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Montero-Sandiego E, Ruiz-Robledillo N, Ferrer-Cascales R, Clement-Carbonell V, Alcocer-Bruno C, Albaladejo-Blázquez N. Spanish validation of the simple lifestyle indicator questionnaire: validity and reliability analysis. Front Public Health 2024; 11:1146010. [PMID: 38264245 PMCID: PMC10803412 DOI: 10.3389/fpubh.2023.1146010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Accepted: 12/19/2023] [Indexed: 01/25/2024] Open
Abstract
Introduction It has been shown that lifestyle is a highly modifiable determinant having a direct effect on the health status. Therefore, short and simple questionnaires assessing the lifestyle of the general and clinical population are needed to create interventions on behavioral aspects that can improve the health status. The Simple Lifestyle Indicator Questionnaire (SLIQ) is a validated health scale in English that combines five lifestyle factors: diet, exercise, alcohol consumption, tobacco use, and stress level. The objective of this study was to validate the SLIQ questionnaire in Spanish by analyzing the scale's validity and reliability. Its discriminatory power of the scale was also examined by evaluating the differences in health outcomes according to the levels of adherence to a healthy lifestyle. Methods The sample consisted of 745 participants with an average age of 39.94 (SD: 16.99). A transcultural adaptation process was carried out to validate the SLIQ questionnaire in the Spanish context, to determinate the structural equivalence of the Spanish version as compared to the English version, and to assess the psychometric properties of the scale. PREDIMED and IPAQ scales were used to analyze the convergent validity of the Spanish version of the SLIQ regarding to diet and exercise, and the questionnaires SF-12 and DASS-21 questionnaires were used to assess the capacity of the Spanish version of the SLIQ to discriminate health status related to different levels of reported lifestyles. Results Regarding validity, the results indicate significant correlations between the different dimensions of the SLIQ questionnaire and those used as a reference. As for reliability, the test-retest analyses reveal a high temporal consistency for the scores obtained on the questionnaire. Finally, the differences found in anxiety, depression, and quality of life, with regard to the different levels of adherence in the SLIQ questionnaire, suggest that the questionnaire's Spanish version has adequate discriminatory power. Discussion The obtained correlation coefficients between the SLIQ and the other standardized measures pointed out the adequate convergent validity of the instrument. Moreover, the test-retest results demonstrated the stability of the results obtained through this questionnaire. Finally, the lifestyle categories derived from the SLIQ showed a high ability to discriminate between participants' health profiles. Hence, it can be concluded that the Spanish version of the SLIQ questionnaire is a valid and reliable tool for the quick and effective assessment of lifestyle.
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Affiliation(s)
| | - Nicolás Ruiz-Robledillo
- Department of Health Psychology, Faculty of Health Science, University of Alicante, Alicante, Spain
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Vuletic PR, Kesic MG, Gilic B, Pehar M, Uzicanin E, Idrizovic K, Sekulic D. Evaluation of Physical Literacy in 9- to 11-Year-Old Children: Reliability and Validity of Two Measurement Tools in Three Southeastern European Countries. Children (Basel) 2023; 10:1722. [PMID: 38002813 PMCID: PMC10670011 DOI: 10.3390/children10111722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 10/12/2023] [Accepted: 10/21/2023] [Indexed: 11/26/2023]
Abstract
The awareness of the importance of physical literacy (PL) is globally increasing; however, knowledge of the applicability of PL measurement tools in southeastern Europe is limited. The aim of this study was to evaluate the reliability and validity of translated versions of the CAPL-2 and PLAYself questionnaires in 9- to 11-year-old elementary school children from Croatia, Bosnia and Herzegovina, and Montenegro. The participants were 303 children (141 girls; all 9 to 11 years of age) from Croatia (n = 71), Bosnia and Herzegovina (n = 162), and Montenegro (n = 70), enrolled in regular elementary school. The participants were tested throughout a test-retest procedure using two PL evaluation tools, i.e., the Canadian Assessment of Physical Literacy (shorter version, CAPL-2) and the Physical Literacy Assessment of Youth (PLAYself) questionnaires. With an intraclass correlation (ICC) of 0.70-0.80 for specific questionnaire subscales and 0.84 for the total score, PLAYself was found to be reliable. With Kappa values of 0.11-0.23 and a percentage of absolute agreement of less than 62%, CAPL-2 appeared to be less reliable. Factors related to sport participation were significantly positively associated with the PLAYself score, indicating its proper validity. In conclusion, we suggest the usage of the PLAYself questionnaire in further studies examining PL in children of a similar age in the region. Future studies in other age groups and languages are also warranted.
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Affiliation(s)
- Petra Rajkovic Vuletic
- Faculty of Kinesiology, University of Split, 21000 Split, Croatia; (P.R.V.); (M.G.K.); (B.G.)
- Faculty of Kinesiology, University of Zagreb, 10000 Zagreb, Croatia
| | - Marijana Geets Kesic
- Faculty of Kinesiology, University of Split, 21000 Split, Croatia; (P.R.V.); (M.G.K.); (B.G.)
| | - Barbara Gilic
- Faculty of Kinesiology, University of Split, 21000 Split, Croatia; (P.R.V.); (M.G.K.); (B.G.)
| | - Miran Pehar
- Faculty of Science and Education, University of Mostar, 88000 Mostar, Bosnia and Herzegovina;
| | - Edin Uzicanin
- Faculty of Sport and Physical Education, University of Tuzla, 75000 Tuzla, Bosnia and Herzegovina;
| | - Kemal Idrizovic
- Faculty for Sport and Physical Education, University of Montenegro, 81400 Niksic, Montenegro;
| | - Damir Sekulic
- Faculty of Kinesiology, University of Split, 21000 Split, Croatia; (P.R.V.); (M.G.K.); (B.G.)
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Borowiec J, Kantanista A, Król-Zielińska M. Cross-cultural adaptation of the Contextual Body Image Questionnaire for Athletes for young physically active Polish adults. Ann Agric Environ Med 2023; 30:543-548. [PMID: 37772532 DOI: 10.26444/aaem/162686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/30/2023]
Abstract
INTRODUCTION AND OBJECTIVE Individuals who are not professional and competitive athletes but who engage in regular (even daily) physical activity may experience a different body image in the context of physical activity compared with that in everyday life. The Contextual Body Image Questionnaire for Athletes (CBIQA) has been developed to assess aspects of body image within these two dimensions, but has not yet been validated in the Polish population. This study aimed to conduct a cross-cultural adaptation of the CBIQA for physically active Polish adults. MATERIAL AND METHODS The study sample comprised 90 young Polish adults (49 women and 41 men). All respondents regularly participated in recreational sports. The average age of the sample was 21.4 years. All participants engaged in physical activity at least 3 times per week. The average training experience was 8.6 years. A 3-phase study was conducted: 1) translation of the CBIQA for use in a Polish sample, 2) pretesting and cognitive debriefing, and 3) evaluation of the test-retest reliability. The test-retest interval was 7 days. Interclass correlation coefficients were calculated. RESULTS The 1-week test- retest results (ICC) ranged from 0.83-0.94 in the daily life subscales and from 0.86-0.95 in the athletic subscales among all participants. The reliability of the CBIQA was high. The alpha value for the internal consistency of the translated and adapted instrument was 0.91. After the translation and cognitive interview, 3 sentences were reworded to adapt the instrument to Polish culture. CONCLUSIONS The CBIQA exhibited a high tes-retest reliability and good validity for assessing daily and physical activity-related body image in a Polish population.
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Affiliation(s)
- Joanna Borowiec
- Department of Physical Education and Lifelong Sports, University of Physical Education, Poznań, Poland
| | - Adam Kantanista
- Department of Physical Education and Lifelong Sports, University of Physical Education, Poznań, Poland
| | - Magdalena Król-Zielińska
- Department of Physical Education and Lifelong Sports, University of Physical Education, Poznań, Poland
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Pace CS, Muzi S, Morganti W, Steele H. Attachment Stability and Longitudinal Prediction of Psychotic-like Symptoms in Community Adolescents over Four Months of COVID-19 Pandemic. Int J Environ Res Public Health 2023; 20:6562. [PMID: 37623148 PMCID: PMC10454594 DOI: 10.3390/ijerph20166562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 07/26/2023] [Accepted: 08/03/2023] [Indexed: 08/26/2023]
Abstract
Background: The Friends and Family Interview (FFI) is assumed to be a valid method to study attachment stability and attachment-related psychopathological processes in adolescence, but no studies have yet tested the test-retest reliability of this interview or the longitudinal association of attachment patterns in response to the FFI from adolescents with symptoms such as psychotic-like experiences (e.g., hallucinations, bizarre behavior, dissociation, self-harm) that are known to have increased during the COVID-19 pandemic. Methods: This study involved 102 community adolescents (M = 14.64, SD = 1.63, 46% males) assessed twice: during a severe COVID-19-related lockdown (in Italy) (T1) and four months later (T2). Measures were the FFI (assessing attachment patterns: secure-autonomous, insecure-dismissing, insecure-preoccupied, and insecure-disorganized) and the thought problems scale of the Youth Self-Report to assess psychotic-like symptoms. Results: revealed high stability of four-way attachment classifications over four months (93.5%), with a modest yet significant link between higher disorganization at T1 and higher scores of thought problems at T2, p = 0.010. Conclusions: The FFI shows high test-retest reliability and can be a valid, age-adapted option to assess adolescents' attachment. Attachment disorganization should be further investigated as possibly related to psychotic-like experiences in community adolescents.
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Affiliation(s)
- Cecilia Serena Pace
- Department of Educational Sciences, University of Genoa, 16128 Genoa, Italy; (S.M.); (W.M.)
| | - Stefania Muzi
- Department of Educational Sciences, University of Genoa, 16128 Genoa, Italy; (S.M.); (W.M.)
| | - Wanda Morganti
- Department of Educational Sciences, University of Genoa, 16128 Genoa, Italy; (S.M.); (W.M.)
| | - Howard Steele
- Center for Attachment Research, New School for Social Research, New York, NY 10011, USA;
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Oliveira CM, Hayiou-Thomas ME, Henderson LM. The reliability of the serial reaction time task: meta-analysis of test-retest correlations. R Soc Open Sci 2023; 10:221542. [PMID: 37476512 PMCID: PMC10354485 DOI: 10.1098/rsos.221542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 06/22/2023] [Indexed: 07/22/2023]
Abstract
The Serial Reaction Time task, one of the most widely used tasks to index procedural memory, has been increasingly employed in individual differences research examining the role of procedural memory in language and other cognitive abilities. Yet, despite consistently producing robust procedural learning effects at the group level (i.e. faster responses to sequenced/probable trials versus random/improbable trials), these effects have recently been found to have poor reliability. In this meta-analysis (N = 7), comprising 719 participants (M = 20.81, s.d. = 7.13), we confirm this 'reliability paradox'. The overall retest reliability of the robust procedural learning effect elicited by the SRTT was found to be well below acceptable psychometric standards (r < 0.40). However, split-half reliability within a session is better, with an overall estimate of 0.66. There were no significant effects of sampling (participants' age), methodology (e.g. number of trials, sequence type) and analytical decisions (whether all trials were included when computing the procedural learning scores; using different indexes of procedural learning). Thus, despite producing robust effects at the group-level, until we have a better understanding of the factors that improve the reliability of this task using the SRTT for individual differences research should be done with caution.
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Affiliation(s)
- Cátia M. Oliveira
- Department of Psychology, University of York, York, North Yorkshire, UK
| | | | - Lisa M. Henderson
- Department of Psychology, University of York, York, North Yorkshire, UK
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Mahmud M, Wade C, Jawad S, Hadi Z, Otoul C, Kaminski RM, Muglia P, Kadiu I, Rabiner E, Maguire P, Owen DR, Johnson MR. Translocator protein PET imaging in temporal lobe epilepsy: A reliable test-retest study using asymmetry index. Front Neuroimaging 2023; 2:1142463. [PMID: 37554649 PMCID: PMC10406252 DOI: 10.3389/fnimg.2023.1142463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 02/24/2023] [Indexed: 08/10/2023]
Abstract
Objective Translocator protein (TSPO) targeting positron emission tomography (PET) imaging radioligands have potential utility in epilepsy to assess the efficacy of novel therapeutics for targeting neuroinflammation. However, previous studies in healthy volunteers have indicated limited test-retest reliability of TSPO ligands. Here, we examine test-retest measures using TSPO PET imaging in subjects with epilepsy and healthy controls, to explore whether this biomarker can be used as an endpoint in clinical trials for epilepsy. Methods Five subjects with epilepsy and confirmed mesial temporal lobe sclerosis (mean age 36 years, 3 men) were scanned twice-on average 8 weeks apart-using a second generation TSPO targeting radioligand, [11C]PBR28. We evaluated the test-retest reliability of the volume of distribution and derived hemispheric asymmetry index of [11C]PBR28 binding in these subjects and compared the results with 8 (mean age 45, 6 men) previously studied healthy volunteers. Results The mean (± SD) of the volume of distribution (VT), of all subjects, in patients living with epilepsy for both test and retest scans on all regions of interest (ROI) is 4.49 ± 1.54 vs. 5.89 ± 1.23 in healthy volunteers. The bias between test and retest in an asymmetry index as a percentage was small (-1.5%), and reliability is demonstrated here with Bland-Altman Plots (test mean 1.062, retest mean 2.56). In subjects with epilepsy, VT of [11C]PBR28 is higher in the (ipsilateral) hippocampal region where sclerosis is present than in the contralateral region. Conclusion When using TSPO PET in patients with epilepsy with hippocampal sclerosis (HS), an inter-hemispheric asymmetry index in the hippocampus is a measure with good test-retest reliability. We provide estimates of test-retest variability that may be useful for estimating power where group change in VT represents the clinical outcome.
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Affiliation(s)
- Mohammad Mahmud
- Department of Brain Sciences, Imperial College London, London, United Kingdom
| | - Charles Wade
- Department of Brain Sciences, Imperial College London, London, United Kingdom
| | - Sarah Jawad
- Department of Brain Sciences, Imperial College London, London, United Kingdom
| | - Zaeem Hadi
- Department of Brain Sciences, Imperial College London, London, United Kingdom
| | - Christian Otoul
- Clinical Imaging Translational, UCB Pharma SA, Brussels, Belgium
| | - Rafal M. Kaminski
- Department of Medicinal Chemistry, Faculty of Pharmacy, Jagiellonian University Medical College, Krakow, Poland
| | | | - Irena Kadiu
- Clinical Imaging Translational, UCB Pharma SA, Brussels, Belgium
| | - Eugenii Rabiner
- Translational Applications, Invicro LLC, London, United Kingdom
| | - Paul Maguire
- Clinical Imaging Translational, UCB Pharma SA, Brussels, Belgium
| | - David R. Owen
- Department of Brain Sciences, Imperial College London, London, United Kingdom
| | - Michael R. Johnson
- Department of Brain Sciences, Imperial College London, London, United Kingdom
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Rinderknecht MD, Zanon M, Boonstra TA, Angelini L, Stanev D, Chan GG, Bunn L, Dondelinger F, Hosking R, Freeman J, Hobart J, Marsden J, Craveiro L. An observational study to assess validity and reliability of smartphone sensor-based gait and balance assessments in multiple sclerosis: Floodlight GaitLab protocol. Digit Health 2023; 9:20552076231205284. [PMID: 37868156 PMCID: PMC10588425 DOI: 10.1177/20552076231205284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Accepted: 09/18/2023] [Indexed: 10/24/2023] Open
Abstract
Background Gait and balance impairments are often present in people with multiple sclerosis (PwMS) and have a significant impact on quality of life and independence. Gold-standard quantitative tools for assessing gait and balance such as motion capture systems and force plates usually require complex technical setups. Wearable sensors, including those integrated into smartphones, offer a more frequent, convenient, and minimally burdensome assessment of functional disability in a home environment. We developed a novel smartphone sensor-based application (Floodlight) that is being used in multiple research and clinical contexts, but a complete validation of this technology is still lacking. Methods This protocol describes an observational study designed to evaluate the analytical and clinical validity of Floodlight gait and balance tests. Approximately 100 PwMS and 35 healthy controls will perform multiple gait and balance tasks in both laboratory-based and real-world environments in order to explore the following properties: (a) concurrent validity of the Floodlight gait and balance tests against gold-standard assessments; (b) reliability of Floodlight digital measures derived under different controlled gait and balance conditions, and different on-body sensor locations; (c) ecological validity of the tests; and (d) construct validity compared with clinician- and patient-reported assessments. Conclusions The Floodlight GaitLab study (ISRCTN15993728) represents a critical step in the technical validation of Floodlight technology to measure gait and balance in PwMS, and will also allow the development of new test designs and algorithms.
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Affiliation(s)
| | | | | | | | | | | | - Lisa Bunn
- Faculty of Health, University of Plymouth, Plymouth, UK
| | | | | | - Jenny Freeman
- Faculty of Health, University of Plymouth, Plymouth, UK
| | - Jeremy Hobart
- Plymouth University Peninsula Schools of Medicine and Dentistry, Plymouth, UK
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Angelescu I, Kaar SJ, Marques TR, Borgan F, Veronesse M, Sharman A, Sajjala A, Deakin B, Hutchison J, Large C, Howes OD. The effect of AUT00206, a Kv3 potassium channel modulator, on dopamine synthesis capacity and the reliability of [ 18F]-FDOPA imaging in schizophrenia. J Psychopharmacol 2022; 36:1061-1069. [PMID: 36164687 PMCID: PMC9554157 DOI: 10.1177/02698811221122031] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
BACKGROUND Current treatments for schizophrenia act directly on dopamine (DA) receptors but are ineffective for many patients, highlighting the need to develop new treatment approaches. Striatal DA dysfunction, indexed using [18F]-FDOPA imaging, is linked to the pathoetiology of schizophrenia. We evaluated the effect of a novel drug, AUT00206, a Kv3.1/3.2 potassium channel modulator, on dopaminergic function in schizophrenia and its relationship with symptom change. Additionally, we investigated the test-retest reliability of [18F]-FDOPA PET in schizophrenia to determine its potential as a biomarker for drug discovery. METHODS Twenty patients with schizophrenia received symptom measures and [18F]-FDOPA PET scans, before and after being randomised to AUT00206 or placebo groups for up to 28 days treatment. RESULTS AUT00206 had no significant effect on DA synthesis capacity. However, there was a correlation between reduction in striatal dopamine synthesis capacity (indexed as Kicer) and reduction in symptoms, in the AUT00206 group (r = 0.58, p = 0.03). This was not observed in the placebo group (r = -0.15, p = 0.75), although the placebo group may have been underpowered to detect an effect. The intraclass correlation coefficients of [18F]-FDOPA indices in the placebo group ranged from 0.83 to 0.93 across striatal regions. CONCLUSIONS The relationship between reduction in DA synthesis capacity and improvement in symptoms in the AUT00206 group provides evidence for a pharmacodynamic effect of the Kv3 channel modulator. The lack of a significant overall reduction in DA synthesis capacity in the AUT00206 group could be due to variability and the low number of subjects in this study. These findings support further investigation of Kv3 channel modulators for schizophrenia treatment. [18F]-FDOPA PET imaging showed very good test-retest reliability in patients with schizophrenia.
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Affiliation(s)
- Ilinca Angelescu
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK.,Max Planck UCL Centre for Computational Psychiatry and Ageing Research, Institute of Neurology, London, UK
| | - Stephen J Kaar
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Tiago Reis Marques
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK.,Faculty of Medicine, Institute of Clinical Sciences, Imperial College London, London, UK
| | - Faith Borgan
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Mattia Veronesse
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK.,Department of Information Engineering, University of Padua, Padua, Italy
| | - Alice Sharman
- Autifony Therapeutics Limited, Stevenage Bioscience Catalyst, Stevenage, UK
| | - Anil Sajjala
- Autifony Therapeutics Limited, Stevenage Bioscience Catalyst, Stevenage, UK
| | - Bill Deakin
- Division of Neuroscience and Experimental Psychology, University of Manchester, Manchester, UK
| | - John Hutchison
- Autifony Therapeutics Limited, Stevenage Bioscience Catalyst, Stevenage, UK
| | - Charles Large
- Autifony Therapeutics Limited, Stevenage Bioscience Catalyst, Stevenage, UK
| | - Oliver D Howes
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK.,Faculty of Medicine, Institute of Clinical Sciences, Imperial College London, London, UK
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Desanlis J, Gordon D, Calveyrac C, Cottin F, Gernigon M. Intra- and Inter-Day Reliability of the NIRS Portamon Device after Three Induced Muscle Ischemias. Sensors (Basel) 2022; 22:5165. [PMID: 35890846 PMCID: PMC9317239 DOI: 10.3390/s22145165] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Revised: 07/06/2022] [Accepted: 07/07/2022] [Indexed: 06/15/2023]
Abstract
(1) Background: Near-infrared spectroscopy (NIRS) is an innovative and non-invasive technology used to investigate muscular oxygenation. The aim of this study is to assess the within- and between-session reliability of the NIRS Portamon (Artinis, Elst, Netherlands) device following three sets of induced muscle ischemia. (2) Methods: Depending on the experimental group (G1, G2 or G3), a cuff was inflated three times on the left upper arm to 50 mmHg (G1), systolic blood pressure (SBP) + 50 mmHg (G2) or 250 mmHg (G3). Maximum, minimum and reoxygenation rate values were assessed after each occlusion phase, using a Portamon device placed on the left brachioradialis. Reliability was assessed with intraclass correlation coefficient (ICC) value and ICC 95% confidence interval (CI-95%), coefficient of variation (CV) and standard error of measurement (SEM) (3) Results: Our results showed a good to excellent reliability for maximums and minimums within-session. However, the reoxygenation rate within sessions as well as measurements between sessions cannot predominantly show good reliability. (4) Conclusions: Multiple measurements of maximums and minimums within a single session appeared to be reliable which shows that only one measurement is necessary to assess these parameters. However, it is necessary to be cautious with a comparison of maximum, minimum and reoxygenation rate values between sessions.
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Affiliation(s)
- Julien Desanlis
- CIAMS, Université Paris-Saclay, CEDEX, 91405 Orsay, France; (C.C.); (F.C.); (M.G.)
- CIAMS, Université d’Orléans, 45067 Orléans, France
- Anglia Ruskin University, Cambridge CB1 1PT, UK;
| | - Dan Gordon
- Anglia Ruskin University, Cambridge CB1 1PT, UK;
| | - Camille Calveyrac
- CIAMS, Université Paris-Saclay, CEDEX, 91405 Orsay, France; (C.C.); (F.C.); (M.G.)
- CIAMS, Université d’Orléans, 45067 Orléans, France
| | - François Cottin
- CIAMS, Université Paris-Saclay, CEDEX, 91405 Orsay, France; (C.C.); (F.C.); (M.G.)
- CIAMS, Université d’Orléans, 45067 Orléans, France
| | - Marie Gernigon
- CIAMS, Université Paris-Saclay, CEDEX, 91405 Orsay, France; (C.C.); (F.C.); (M.G.)
- CIAMS, Université d’Orléans, 45067 Orléans, France
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Mansur H, Estanislau G, Noronha MD, Marqueti RDC, Fachin-Martins E, Durigan JLQ. Intra- and inter-rater reliability for the measurement of the cross-sectional area of ankle tendons assessed by magnetic resonance imaging. Acta Radiol 2022; 63:481-488. [PMID: 34247515 DOI: 10.1177/02841851211003284] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND The cross-sectional area (CSA) records make an essential measurement for determining the mechanical properties of tendons, such as stress and strength. However, there is no consensus regarding the best method to record the CSA from different tendons. PURPOSE To determine intra- and inter-rater reliability for CSA measures from magnetic resonance imaging (MRI) of the following tendons: tibialis anterior; tibialis posterior; fibularis longus and brevis; and Achilles. MATERIAL AND METHODS We designed an observational study with repeated measures taken from a convenience sample of 20 participants diagnosed with acute or chronic ankle sprain. Two independent raters took three separate records from the CSA of ankle tendon images of each MRI slice. The intra-class correlation coefficient (ICC) and 95% limits of agreement (LoA) defined the quality (associations) and magnitude (differences), respectively, of intra- and inter-rater reliability on the measures plotted by the Bland-Altman method. RESULTS Data showed very high intra- and inter-rater correlations for measures taken from all tendons analyzed (ICC 0.952-0.999). It also revealed an excellent agreement between raters (0.12%-2.3%), with bias no higher than 2 mm2 and LoA in the range of 4.4-7.9 mm2. The differences between repeated measures recorded from the thinnest tendons (fibularis longus and brevis) revealed the lowest bias and narrowest 95% LoA. CONCLUSION Reliability for the CSA of ankle tendons measured from MRI taken by independent rates was very high, with the smallest differences between raters observed when the thinnest tendon was analyzed.
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Affiliation(s)
- Henrique Mansur
- Graduate Program in Physical Education Sciences, University of Brasília (UnB), Brasília, Brazil
- Department of Orthopaedics, Hospital das Forças Armadas (HFA), Brasília, Brazil
| | | | | | - Rita de Cassia Marqueti
- Graduate Program in Rehabilitation Sciences, University of Brasília (UnB), Ceilândia, Brazil
| | - Emerson Fachin-Martins
- Graduate Program in Rehabilitation Sciences, University of Brasília (UnB), Ceilândia, Brazil
| | - João Luiz Quagliotti Durigan
- Graduate Program in Physical Education Sciences, University of Brasília (UnB), Brasília, Brazil
- Graduate Program in Rehabilitation Sciences, University of Brasília (UnB), Ceilândia, Brazil
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Abstract
Objective To evaluate the validity and test–retest reliability of the novel ‘TIB’ Olfactory Test Device (TIB) and to determine its normative values. Methods The study stratified the study subjects into normosmic, hyposmic and anosmic groups according to their olfactory function. The olfactory function of the subjects was evaluated using both the traditional Chinese version of the University of Pennsylvania of Smell Identification Test (UPSIT-TC) and the TIB. The normosmic group was used to retest with the UPSIT-TC and TIB at an inter-test interval of at least 7 days. The cut-off scores of TIB among the three different groups were determined by receiver operating characteristic curve analysis. Results This study enrolled 180 subjects: 60 in each group. The mean scores of TIB were 44.1 for the normosmic group, 27.5 for the hyposmic group and 10.9 for the anosmic group. The TIB scores were significantly different across the three groups. There was a significant correlation between the first and second TIB tests (r = 0.506). The cut-off scores were 41 for normosmic subjects and 24 for hyposmic subjects. Conclusion The validity and test–retest reliability results suggest that the TIB is an appropriate olfactory test for the Taiwanese population.
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Affiliation(s)
- Rong-San Jiang
- Department of Medical Research, 40293Taichung Veterans General Hospital, Taichung Veterans General Hospital, Taichung, Taiwan.,Department of Otolaryngology, 40293Taichung Veterans General Hospital, Taichung Veterans General Hospital, Taichung, Taiwan.,School of Medicine, Chung Shan Medical University, Taichung, Taiwan.,Rong Hsing Research Centre for Translational Medicine, National Chung Hsing University, Taichung, Taiwan
| | - Jing-Jie Wang
- Department of Otolaryngology, 40293Taichung Veterans General Hospital, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Kai-Li Liang
- Department of Otolaryngology, 40293Taichung Veterans General Hospital, Taichung Veterans General Hospital, Taichung, Taiwan.,School of Medicine, Chung Shan Medical University, Taichung, Taiwan.,Faculty of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Kai-Hsiang Shih
- Department of Otolaryngology, 40293Taichung Veterans General Hospital, Taichung Veterans General Hospital, Taichung, Taiwan
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12
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Euler A, Laqua FC, Cester D, Lohaus N, Sartoretti T, Pinto Dos Santos D, Alkadhi H, Baessler B. Virtual Monoenergetic Images of Dual-Energy CT-Impact on Repeatability, Reproducibility, and Classification in Radiomics. Cancers (Basel) 2021; 13:4710. [PMID: 34572937 DOI: 10.3390/cancers13184710] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 09/14/2021] [Accepted: 09/17/2021] [Indexed: 01/06/2023] Open
Abstract
Simple Summary Virtual monoenergetic images from dual-energy CT are incrementally used in routine clinical practice. Thus, radiomic analysis will be more often performed on these images in the future. This study characterized the test–retest repeatability and reproducibility of radiomic features from virtual monoenergetic images and their impact on machine-learning-based lesion classification. The results of this study provide a basis to improve radiomic analyses and identify the role of feature stability in classification tasks when using virtual monoenergetic imaging with different scan or reconstruction parameters in multicenter clinical studies. Abstract The purpose of this study was to (i) evaluate the test–retest repeatability and reproducibility of radiomic features in virtual monoenergetic images (VMI) from dual-energy CT (DECT) depending on VMI energy (40, 50, 75, 120, 190 keV), radiation dose (5 and 15 mGy), and DECT approach (dual-source and split-filter DECT) in a phantom (ex vivo), and (ii) to assess the impact of VMI energy and feature repeatability on machine-learning-based classification in vivo in 72 patients with 72 hypodense liver lesions. Feature repeatability and reproducibility were determined by concordance–correlation–coefficient (CCC) and dynamic range (DR) ≥0.9. Test–retest repeatability was high within the same VMI energies and scan conditions (percentage of repeatable features ranging from 74% for SFDE mode at 40 keV and 15 mGy to 86% for DSDE at 190 keV and 15 mGy), while reproducibility varied substantially across different VMI energies and DECTs (percentage of reproducible features ranging from 32.8% for SFDE at 5 mGy comparing 40 with 190 keV to 99.2% for DSDE at 15 mGy comparing 40 with 50 keV). No major differences were observed between the two radiation doses (<10%) in all pair-wise comparisons. In vivo, machine learning classification using penalized regression and random forests resulted in the best discrimination of hemangiomas and metastases at low-energy VMI (40 keV), and for cysts at high-energy VMI (120 keV). Feature selection based on feature repeatability did not improve classification performance. Our results demonstrate the high repeatability of radiomics features when keeping scan and reconstruction conditions constant. Reproducibility diminished when using different VMI energies or DECT approaches. The choice of optimal VMI energy improved lesion classification in vivo and should hence be adapted to the specific task.
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13
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Löppönen A, Karavirta L, Portegijs E, Koivunen K, Rantanen T, Finni T, Delecluse C, Roie EV, Rantalainen T. Day-to-Day Variability and Year-to-Year Reproducibility of Accelerometer-Measured Free-Living Sit-to-Stand Transitions Volume and Intensity among Community-Dwelling Older Adults. Sensors (Basel) 2021; 21:s21186068. [PMID: 34577275 PMCID: PMC8471908 DOI: 10.3390/s21186068] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 09/03/2021] [Accepted: 09/07/2021] [Indexed: 12/31/2022]
Abstract
(1) Background: The purpose of this study was to evaluate the day-to-day variability and year-to-year reproducibility of an accelerometer-based algorithm for sit-to-stand (STS) transitions in a free-living environment among community-dwelling older adults. (2) Methods: Free-living thigh-worn accelerometry was recorded for three to seven days in 86 (women n = 55) community-dwelling older adults, on two occasions separated by one year, to evaluate the long-term consistency of free-living behavior. (3) Results: Year-to-year intraclass correlation coefficients (ICC) for the number of STS transitions were 0.79 (95% confidence interval, 0.70-0.86, p < 0.001), for mean angular velocity-0.81 (95% ci, 0.72-0.87, p < 0.001), and maximal angular velocity-0.73 (95% ci, 0.61-0.82, p < 0.001), respectively. Day-to-day ICCs were 0.63-0.72 for number of STS transitions (95% ci, 0.49-0.81, p < 0.001) and for mean angular velocity-0.75-0.80 (95% ci, 0.64-0.87, p < 0.001). Minimum detectable change (MDC) was 20.1 transitions/day for volume, 9.7°/s for mean intensity, and 31.7°/s for maximal intensity. (4) Conclusions: The volume and intensity of STS transitions monitored by a thigh-worn accelerometer and a sit-to-stand transitions algorithm are reproducible from day to day and year to year. The accelerometer can be used to reliably study STS transitions in free-living environments, which could add value to identifying individuals at increased risk for functional disability.
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Affiliation(s)
- Antti Löppönen
- Faculty of Sport and Health Sciences, Gerontology Research Center, University of Jyväskylä, 40014 Jyväskylä, Finland; (L.K.); (E.P.); (K.K.); (T.R.); (T.R.)
- Physical Activity, Sports and Health Research Group, Department of Movement Sciences, KU Leuven, 3000 Leuven, Belgium; (C.D.); (E.V.R.)
- Correspondence: ; Tel.: +358-406201771
| | - Laura Karavirta
- Faculty of Sport and Health Sciences, Gerontology Research Center, University of Jyväskylä, 40014 Jyväskylä, Finland; (L.K.); (E.P.); (K.K.); (T.R.); (T.R.)
| | - Erja Portegijs
- Faculty of Sport and Health Sciences, Gerontology Research Center, University of Jyväskylä, 40014 Jyväskylä, Finland; (L.K.); (E.P.); (K.K.); (T.R.); (T.R.)
| | - Kaisa Koivunen
- Faculty of Sport and Health Sciences, Gerontology Research Center, University of Jyväskylä, 40014 Jyväskylä, Finland; (L.K.); (E.P.); (K.K.); (T.R.); (T.R.)
| | - Taina Rantanen
- Faculty of Sport and Health Sciences, Gerontology Research Center, University of Jyväskylä, 40014 Jyväskylä, Finland; (L.K.); (E.P.); (K.K.); (T.R.); (T.R.)
| | - Taija Finni
- Faculty of Sport and Health Sciences, Neuromuscular Research Center, University of Jyväskylä, 40014 Jyväskylä, Finland;
| | - Christophe Delecluse
- Physical Activity, Sports and Health Research Group, Department of Movement Sciences, KU Leuven, 3000 Leuven, Belgium; (C.D.); (E.V.R.)
| | - Evelien Van Roie
- Physical Activity, Sports and Health Research Group, Department of Movement Sciences, KU Leuven, 3000 Leuven, Belgium; (C.D.); (E.V.R.)
| | - Timo Rantalainen
- Faculty of Sport and Health Sciences, Gerontology Research Center, University of Jyväskylä, 40014 Jyväskylä, Finland; (L.K.); (E.P.); (K.K.); (T.R.); (T.R.)
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14
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Abstract
An essential question when computing test-retest and alternate forms reliability coefficients is how many days there should be between tests. This article uses data from reading and math computerized adaptive tests to explore how the number of days between tests impacts alternate forms reliability coefficients. Results suggest that the highest alternate forms reliability coefficients were obtained when the second test was administered at least 2 to 3 weeks after the first test. Even though reliability coefficients after this amount of time were often similar, results suggested a potential tradeoff in waiting longer to retest as student ability tended to grow with time. These findings indicate that if keeping student ability similar is a concern that the best time to retest is shortly after 3 weeks have passed since the first test. Additional analyses suggested that alternate forms reliability coefficients were lower when tests were shorter and that narrowing the first test ability distribution of examinees also impacted estimates. Results did not appear to be largely impacted by differences in first test average ability, student demographics, or whether the student took the test under standard or extended time. It is suggested that for math and reading tests, like the ones analyzed in this article, the optimal retest interval would be shortly after 3 weeks have passed since the first test.
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Affiliation(s)
- Adam E. Wyse
- Renaissance, Arden Hills, MN, USA
- Adam E. Wyse, Renaissance, 1813 Chatham Ave,
Arden Hills, MN 55112, USA.
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15
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McCusker MC, Lew BJ, Wilson TW. Three-Year Reliability of MEG Visual and Somatosensory Responses. Cereb Cortex 2021; 31:2534-2548. [PMID: 33341876 DOI: 10.1093/cercor/bhaa372] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 11/12/2020] [Accepted: 11/12/2020] [Indexed: 12/14/2022] Open
Abstract
A major goal of many translational neuroimaging studies is the identification of biomarkers of disease. However, a prerequisite for any such biomarker is robust reliability, which for magnetoencephalography (MEG) and many other imaging modalities has not been established. In this study, we examined the reliability of visual (Experiment 1) and somatosensory gating (Experiment 2) responses in 19 healthy adults who repeated these experiments for three visits spaced 18 months apart. Visual oscillatory and somatosensory oscillatory and evoked responses were imaged, and intraclass correlation coefficients (ICC) were computed to examine the long-term reliability of these responses. In Experiment 1, ICCs showed good reliability for visual theta and alpha responses in occipital cortices, but poor reliability for gamma responses. In Experiment 2, the time series of somatosensory gamma and evoked responses in the contralateral somatosensory cortex showed good reliability. Finally, analyses of spontaneous baseline activity indicated excellent reliability for occipital alpha, moderate reliability for occipital theta, and poor reliability for visual/somatosensory gamma activity. Overall, MEG responses to visual and somatosensory stimuli show a high degree of reliability across 3 years and therefore may be stable indicators of sensory processing long term and thereby of potential interest as biomarkers of disease.
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Affiliation(s)
- Marie C McCusker
- Institute for Human Neuroscience, Boys Town National Research Hospital, Boys Town, NE, 68010, USA
| | - Brandon J Lew
- Institute for Human Neuroscience, Boys Town National Research Hospital, Boys Town, NE, 68010, USA.,College of Medicine, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Tony W Wilson
- Institute for Human Neuroscience, Boys Town National Research Hospital, Boys Town, NE, 68010, USA.,College of Medicine, University of Nebraska Medical Center, Omaha, NE, 68198, USA
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16
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Hossein A, Rabineau J, Gorlier D, Del Rio JIJ, van de Borne P, Migeotte PF, Nonclercq A. Kinocardiography Derived from Ballistocardiography and Seismocardiography Shows High Repeatability in Healthy Subjects. Sensors (Basel) 2021; 21:815. [PMID: 33530417 PMCID: PMC7865512 DOI: 10.3390/s21030815] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 01/20/2021] [Accepted: 01/21/2021] [Indexed: 01/14/2023]
Abstract
Recent years have witnessed an upsurge in the usage of ballistocardiography (BCG) and seismocardiography (SCG) to record myocardial function both in normal and pathological populations. Kinocardiography (KCG) combines these techniques by measuring 12 degrees-of-freedom of body motion produced by myocardial contraction and blood flow through the cardiac chambers and major vessels. The integral of kinetic energy (iK) obtained from the linear and rotational SCG/BCG signals, and automatically computed over the cardiac cycle, is used as a marker of cardiac mechanical function. The present work systematically evaluated the test-retest (TRT) reliability of KCG iK derived from BCG/SCG signals in the short term (<15 min) and long term (3-6 h) on 60 healthy volunteers. Additionally, we investigated the difference of repeatability with different body positions. First, we found high short-term TRT reliability for KCG metrics derived from SCG and BCG recordings. Exceptions to this finding were limited to metrics computed in left lateral decubitus position where the TRT reliability was moderate-to-high. Second, we found low-to-moderate long-term TRT reliability for KCG metrics as expected and confirmed by blood pressure measurements. In summary, KCG parameters derived from BCG/SCG signals show high repeatability and should be further investigated to confirm their use for cardiac condition longitudinal monitoring.
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Affiliation(s)
- Amin Hossein
- LPHYS, Université Libre de Bruxelles, 1050 Bruxelles, Belgium; (J.R.); (D.G.); (P.-F.M.)
- BEAMS, Université Libre de Bruxelles, 1050 Bruxelles, Belgium;
| | - Jérémy Rabineau
- LPHYS, Université Libre de Bruxelles, 1050 Bruxelles, Belgium; (J.R.); (D.G.); (P.-F.M.)
| | - Damien Gorlier
- LPHYS, Université Libre de Bruxelles, 1050 Bruxelles, Belgium; (J.R.); (D.G.); (P.-F.M.)
| | - Jose Ignacio Juarez Del Rio
- Department of Cardiology, Erasme Hospital, Université Libre de Bruxelles, 1050 Bruxelles, Belgium; (J.I.J.D.R.); (P.v.d.B.)
| | - Philippe van de Borne
- Department of Cardiology, Erasme Hospital, Université Libre de Bruxelles, 1050 Bruxelles, Belgium; (J.I.J.D.R.); (P.v.d.B.)
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17
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Salinas C, Lohith TG, Purohit A, Struyk A, Sur C, Bennacef I, Beaver J, Martarello L. Test-retest characteristic of [ 18F]MK-6240 quantitative outcomes in cognitively normal adults and subjects with Alzheimer's disease. J Cereb Blood Flow Metab 2020; 40:2179-2187. [PMID: 31711342 PMCID: PMC7585918 DOI: 10.1177/0271678x19887781] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
[18F]MK-6240 is a selective, high-affinity PET radiotracer for imaging neurofibrillary tangles (NFT) in Alzheimer's disease (AD). Herein, we report test-retest (T-RT) reproducibility of [18F]MK-6240 in AD and healthy volunteers (HV). Twelve subjects with AD and three cognitively normal HV were enrolled in the study and dynamically scanned for 150 min with [18F]MK-6240 under a T-RT protocol. Two radioactivity doses were investigated: 165 ± 3 MBq (n = 6) and 300 ± 40 MBq (n = 9). Serial arterial blood samples were taken for each scan to obtain metabolite-corrected input functions. Following intravenous administration of [18F]MK-6240, the tracer rapidly partitioned into the brain and its heterogenous distribution pattern was consistent with known NFT pathology in AD. In contrast, uptake in HV was low and uniform across the brain parenchyma. Across all subjects, average T-RT variabilities in NFT-rich regions were ∼21%, ∼14% and ∼6% for various quantitative metrics: total distribution volume (VT), binding potential (BPND), and standardized uptake ratio (SUVR90-120), respectively. No significant differences in SUVR T-RT variability were observed between the high and low injected radioactivity groups (5.6% and 6.1%, respectively). This work suggests [18F]MK-6240 has adequate SUVR T-RT characteristics supporting the use of this outcome in future studies.
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Affiliation(s)
| | - Talakad G Lohith
- Translational Biomarkers, Merck & Co., Inc., West Point, PA, USA
| | | | - Arie Struyk
- Translational Pharmacology, Merck & Co., Inc., North Wales, PA, USA
| | - Cyrille Sur
- Translational Biomarkers, Merck & Co., Inc., West Point, PA, USA
| | - Idriss Bennacef
- Translational Biomarkers, Merck & Co., Inc., West Point, PA, USA
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18
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Devanand DP, Liu X, Cohen H, Budrow J, Schupf N, Manly J, Lee S. Long-Term Test-Retest Reliability of the UPSIT in Cognitively Intact Older Adults. Chem Senses 2020; 44:365-369. [PMID: 31111142 DOI: 10.1093/chemse/bjz025] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The objective of this study was to determine the long-term test-retest reliability of the University of Pennsylvania Smell Identification Test (UPSIT), and its individual items, in cognitively intact older adults. A community sample of older adults received a neuropsychological test battery, including the 12-item, 6-trial Selective Reminding Test (SRT). The UPSIT was administered at baseline and follow-up that occurred between 1 and 4 years after baseline. UPSIT scores of participants who were cognitively intact and did not decline cognitively were examined for test-retest reliability. In 92 older adults with mean age 77.6 years followed for 2.79 (standard deviation [SD] 0.69) years, mean UPSIT score declined from 30.29 (SD 5.83) to 27.80 (SD 5.50). In linear mixed models that adjusted for time, age, sex, and education, intraclass correlation coefficients for UPSIT were 0.65, SRT delayed recall 0.59, and SRT total immediate recall 0.49. Among 4 possible response combinations, the largest proportion of participants had correct responses at both visits for 35 out of 40 items. Consistency of item responses ranged from 50% to 90% across the 2 time points. The long-term test-retest reliability of the UPSIT was moderately strong without practice effects over long periods of time in older adults. These results provide indirect support to prior findings on odor identification impairment predicting cognitive decline and dementia, and suggest potential use of olfactory testing as a biomarker in prevention and treatment trials of cognitive enhancers.
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Affiliation(s)
- Davangere P Devanand
- Division of Geriatric Psychiatry, New York State Psychiatric Institute, New York, NY, USA.,Department of Psychiatry, Columbia University Medical Center, New York, NY, USA
| | - Xinhua Liu
- Department of Biostatistics, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Hannah Cohen
- Division of Geriatric Psychiatry, New York State Psychiatric Institute, New York, NY, USA
| | - John Budrow
- Division of Geriatric Psychiatry, New York State Psychiatric Institute, New York, NY, USA.,New York Medical College, Valhalla, NY, USA
| | - Nicole Schupf
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University, New York, NY, USA
| | - Jennifer Manly
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University, New York, NY, USA
| | - Seonjoo Lee
- Department of Psychiatry, Columbia University Medical Center, New York, NY, USA.,Department of Biostatistics, Mailman School of Public Health, Columbia University, New York, NY, USA.,Division of Mental Health Data Science, New York State Psychiatric Institute, New York, NY, USA
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19
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Zulfarina MS, Sharif R, Sharkawi AM, Tg Abu Bakar Sidik TMI, Mokhtar SA, Shuid AN, Naina-Mohamed I. Reliability of Self-Administered Questionnaire on Dietary Supplement Consumption in Malaysian Adolescents. Nutrients 2020; 12:E2853. [PMID: 32957625 DOI: 10.3390/nu12092853] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 09/15/2020] [Accepted: 09/16/2020] [Indexed: 11/20/2022] Open
Abstract
The repeatability of most questionnaires utilized in previous studies related to the consumption of dietary supplements (DS) among youth has not been well documented. Thus, a simple and easy-to-administer questionnaire to capture the habitual use of DS in the past one year known as the dietary supplement questionnaire (DiSQ) was developed and supported with external reliability evaluation. Analyses were done based on a convenience sample of 46 secondary school students. To elicit information regarding the intake of DS, the questionnaire was partitioned into two domains. The first domain was used to identify vitamin/mineral (VM) supplements, while the second domain was utilized to identify non-vitamin/non-mineral (NVNM) supplements. Cohen’s kappa coefficient (k) was used to evaluate the test–retest reliability of the questionnaire. Questionnaire administration to the respondents was done twice whereby a retest was given two weeks after the first test. Between test and retest, the reliability of individual items ranged from moderate to almost perfect for the VM (k = 0.53–1.00) and NVNM (k = 0.63–1.00) domains. None of the items had “fair” or ”poor” agreement. Various correlation coefficients can be obtained for the DiSQ but are generally reliable over time for assessing information on the consumption of supplements among the adolescent population.
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20
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Płomecka MB, Barańczuk-Turska Z, Pfeiffer C, Langer N. Aging Effects and Test-Retest Reliability of Inhibitory Control for Saccadic Eye Movements. eNeuro 2020; 7:ENEURO. [PMID: 32907833 DOI: 10.1523/ENEURO.0459-19.2020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 08/26/2020] [Accepted: 08/31/2020] [Indexed: 11/21/2022] Open
Abstract
Neuropsychological studies indicate that healthy aging is associated with a decline of inhibitory control of attentional and behavioral systems. A widely accepted measure of inhibitory control is the antisaccade task that requires both the inhibition of a reflexive saccadic response toward a visual target and the initiation of a voluntary eye movement in the opposite direction. To better understand the nature of age-related differences in inhibitory control, we evaluated antisaccade task performance in 78 younger (20-35 years) and 78 older (60-80 years) participants. In order to provide reliable estimates of inhibitory control for individual subjects, we investigated test-retest reliability of the reaction time, error rate, saccadic gain, and peak saccadic velocity and further estimated latent, not directly observable processed contributing to changes in the antisaccade task execution. The intraclass correlation coefficients (ICCs) for an older group of participants emerged as good to excellent for most of our antisaccade task measures. Furthermore, using Bayesian multivariate models, we inspected age-related differences in the performances of healthy younger and older participants. The older group demonstrated higher error rates, longer reaction times, significantly more inhibition failures, and late prosaccades as compared with young adults. The consequently lower ability of older adults to voluntarily inhibit saccadic responses has been interpreted as an indicator of age-related inhibitory control decline. Additionally, we performed a Bayesian model comparison of used computational models and concluded that the Stochastic Early Reaction, Inhibition and Late Action (SERIA) model explains our data better than PRO-Stop-Antisaccade (PROSA) that does not incorporate a late decision process.
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21
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Novi SL, Forero EJ, Rubianes Silva JAI, de Souza NGSR, Martins GG, Quiroga A, Wu ST, Mesquita RC. Integration of Spatial Information Increases Reproducibility in Functional Near-Infrared Spectroscopy. Front Neurosci 2020; 14:746. [PMID: 32848543 PMCID: PMC7399018 DOI: 10.3389/fnins.2020.00746] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 06/24/2020] [Indexed: 11/13/2022] Open
Abstract
As functional near-infrared spectroscopy (fNIRS) is developed as a neuroimaging technique and becomes an option to study a variety of populations and tasks, the reproducibility of the fNIRS signal is still subject of debate. By performing test-retest protocols over different functional tasks, several studies agree that the fNIRS signal is reproducible over group analysis, but the inter-subject and within-subject reproducibility is poor. The high variability at the first statistical level is often attributed to global systemic physiology. In the present work, we revisited the reproducibility of the fNIRS signal during a finger-tapping task across multiple sessions on the same and different days. We expanded on previous studies by hypothesizing that the lack of spatial information of the optodes contributes to the low reproducibility in fNIRS, and we incorporated a real-time neuronavigation protocol to provide accurate cortical localization of the optodes. Our proposed approach was validated in 10 healthy volunteers, and our results suggest that the addition of neuronavigation can increase the within-subject reproducibility of the fNIRS data, particularly in the region of interest. Unlike traditional approaches to positioning the optodes, in which low intra-subject reproducibility has been found, we were able to obtain consistent and robust activation of the contralateral primary motor cortex at the intra-subject level using a neuronavigation protocol. Overall, our findings support the hypothesis that at least part of the variability in fNIRS cannot be only attributed to global systemic physiology. The use of neuronavigation to guide probe positioning, as proposed in this work, has impacts to longitudinal protocols performed with fNIRS.
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Affiliation(s)
- Sergio Luiz Novi
- “Gleb Wataghin” Institute of Physics, University of Campinas, Campinas, Brazil
- Brazilian Institute of Neuroscience and Neurotechnology, Campinas, Brazil
| | - Edwin Johan Forero
- “Gleb Wataghin” Institute of Physics, University of Campinas, Campinas, Brazil
- Brazilian Institute of Neuroscience and Neurotechnology, Campinas, Brazil
| | - Jose Angel Ivan Rubianes Silva
- Brazilian Institute of Neuroscience and Neurotechnology, Campinas, Brazil
- School of Electrical and Computer Engineering, University of Campinas, Campinas, Brazil
| | - Nicolas Gabriel S. R. de Souza
- “Gleb Wataghin” Institute of Physics, University of Campinas, Campinas, Brazil
- Brazilian Institute of Neuroscience and Neurotechnology, Campinas, Brazil
| | - Giovani Grisotti Martins
- “Gleb Wataghin” Institute of Physics, University of Campinas, Campinas, Brazil
- Brazilian Institute of Neuroscience and Neurotechnology, Campinas, Brazil
| | - Andres Quiroga
- “Gleb Wataghin” Institute of Physics, University of Campinas, Campinas, Brazil
- Brazilian Institute of Neuroscience and Neurotechnology, Campinas, Brazil
| | - Shin-Ting Wu
- Brazilian Institute of Neuroscience and Neurotechnology, Campinas, Brazil
- School of Electrical and Computer Engineering, University of Campinas, Campinas, Brazil
| | - Rickson C. Mesquita
- “Gleb Wataghin” Institute of Physics, University of Campinas, Campinas, Brazil
- Brazilian Institute of Neuroscience and Neurotechnology, Campinas, Brazil
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22
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Garrett JM, Graham SR, Eston RG, Burgess DJ, Garrett LJ, Jakeman J, Norton K. Comparison of a Countermovement Jump Test and Submaximal Run Test to Quantify the Sensitivity for Detecting Practically Important Changes Within High-Performance Australian Rules Football. Int J Sports Physiol Perform 2020; 15:68-72. [PMID: 31034296 DOI: 10.1123/ijspp.2019-0150] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 04/04/2019] [Accepted: 04/04/2019] [Indexed: 10/27/2023]
Abstract
PURPOSE To determine the typical variation of variables from a countermovement jump (CMJ) test and a submaximal run test (SRT), along with comparing the sensitivity of each test for the detection of practically important changes within high-performance Australian rules football players. METHODS A total of 23 professional and semiprofessional Australian rules football players performed 6 CMJs and three 8-second 50-m runs every 30 seconds (SRT), 7 days apart. Absolute and trial-to-trial reliability was represented as a coefficient of variation, CV (±90% confidence intervals). Test-retest reliability was examined using the magnitude of the difference (effect size [±90% confidence interval]) from week 1 to week 2. The smallest worthwhile change was calculated as 0.25 × SD. RESULTS Good reliability (CVs = 6.6%-9.3%) was determined for all variables except eccentric displacement (CV = 12.8%), with no clear changes observed in any variables between week 1 and week 2. All variables from the SRT possessed a CV less than smallest worthwhile change, indicating an ability to detect practically important changes in performance. Only peak velocity from the CMJ test possessed a CV less than smallest worthwhile change, exhibiting a limitation of this test in detecting practically meaningful changes within this environment. CONCLUSIONS The results suggest that while all variables possess acceptable reliability, a SRT might offer to be a more sensitive monitoring tool than a CMJ test within high-performance Australian rules football, due to its greater ability for detecting practically important changes in performance.
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23
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Bullich S, Barret O, Constantinescu C, Sandiego C, Mueller A, Berndt M, Papin C, Perrotin A, Koglin N, Kroth H, Pfeifer A, Tamagnan G, Madonia J, Seibyl JP, Marek K, De Santi S, Dinkelborg LM, Stephens AW. Evaluation of Dosimetry, Quantitative Methods, and Test-Retest Variability of 18F-PI-2620 PET for the Assessment of Tau Deposits in the Human Brain. J Nucl Med 2019; 61:920-927. [PMID: 31712324 DOI: 10.2967/jnumed.119.236240] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 11/04/2019] [Indexed: 02/01/2023] Open
Abstract
18F-PI-2620 is a next-generation tau PET tracer that has demonstrated ability to image the spatial distribution of suspected tau pathology. The objective of this study was to assess the tracer biodistribution, dosimetry, and quantitative methods of 18F-PI-2620 in the human brain. Full kinetic modeling to quantify tau load was investigated. Noninvasive kinetic modeling and semiquantitative methods were evaluated against the full tracer kinetics. Finally, the reproducibility of PET measurements from test and retest scans was assessed. Methods: Three healthy controls (HCs) and 4 Alzheimer disease (AD) subjects underwent 2 dynamic PET scans, including arterial sampling. Distribution volume ratio (DVR) was estimated using full tracer kinetics (reversible 2-tissue-compartment [2TC] model and Logan graphical analysis [LGA]) and noninvasive kinetic models (noninvasive LGA [NI-LGA] and the multilinear reference tissue model [MRTM2]). SUV ratio (SUVR) was determined at different imaging windows after injection. The correlation between DVR and SUVR, effect size (Cohen's d), and test-retest variability (TRV) were evaluated. Additionally, 6 HCs received 1 tracer administration and underwent whole-body PET for dosimetry calculation. Organ doses and the whole-body effective dose were calculated using OLINDA 2.0. Results: A strong correlation was found across different kinetic models (R 2 > 0.97) and between DVR(2TC) and SUVR between 30 and 90 min, with an R 2 of more than 0.95. Secular equilibrium was reached at around 40 min after injection in most regions and subjects. TRV and effect size for SUVR across different regions were similar at 30-60 min (TRV, 3.8%; Cohen's d, 3.80), 45-75 min (TRV, 4.3%; Cohen's d, 3.77) and 60-90 min (TRV, 4.9%; Cohen's d, 3.73) and increased at later time points. Elimination was via the hepatobiliary and urinary systems. The whole-body effective dose was 33.3 ± 2.1 μSv/MBq for an adult female and 33.1 ± 1.4 μSv/MBq for an adult male, with a 1.5-h urinary bladder voiding interval. Conclusion: 18F-PI-2620 exhibits fast kinetics, suitable dosimetry, and low TRV. DVR measured using the 2TC model with arterial sampling correlated strongly with DVR measured by NI-LGA, MRTM2, and SUVR. SUVR can be used for 18F-PI-2620 PET quantification of tau deposits, avoiding arterial blood sampling. Static 18F-PI-2620 PET scans between 45 and 75 min after injection provide excellent quantification accuracy, a large effect size, and low TRV.
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Affiliation(s)
| | | | | | | | | | | | - Caroline Papin
- Life Molecular Imaging GmbH, Berlin, Germany.,Invicro, New Haven, Connecticut
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24
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Golla SS, Verfaillie SC, Boellaard R, Adriaanse SM, Zwan MD, Schuit RC, Timmers T, Groot C, Schober P, Scheltens P, van der Flier WM, Windhorst AD, van Berckel BN, Lammertsma AA. Quantification of [ 18F]florbetapir: A test-retest tracer kinetic modelling study. J Cereb Blood Flow Metab 2019; 39:2172-2180. [PMID: 29897009 PMCID: PMC6826855 DOI: 10.1177/0271678x18783628] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Accumulation of amyloid beta can be visualized using [18F]florbetapir positron emission tomography. The aim of this study was to identify the optimal model for quantifying [18F]florbetapir uptake and to assess test-retest reliability of corresponding outcome measures. Eight Alzheimer's disease patients (age: 67 ± 6 years, Mini-Mental State Examination (MMSE): 23 ± 3) and eight controls (age: 63 ± 4 years, MMSE: 30 ± 0) were included. Ninety-minute dynamic positron emission tomography scans, together with arterial blood sampling, were acquired immediately following a bolus injection of 294 ± 32 MBq [18F]florbetapir. Several plasma input models and the simplified reference tissue model (SRTM) were evaluated. The Akaike information criterion was used to identify the preferred kinetic model. Compared to controls, Alzheimer's disease patients had lower MMSE scores and evidence for cortical Aβ pathology. A reversible two-tissue compartment model with fitted blood volume fraction (2T4k_VB) was the preferred model for describing [18F]florbetapir kinetics. SRTM-derived non-displaceable binding potential (BPND) correlated well (r2 = 0.83, slope = 0.86) with plasma input-derived distribution volume ratio. Test-retest reliability for plasma input-derived distribution volume ratio, SRTM-derived BPND and SUVr(50-70) were r = 0.88, r = 0.91 and r = 0.86, respectively. In vivo kinetics of [18F]florbetapir could best be described by a reversible two-tissue compartmental model and [18F]florbetapir BPND can be reliably estimated using an SRTM.
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Affiliation(s)
- Sandeep Sv Golla
- Department of Radiology & Nuclear Medicine, Amsterdam Neuroscience, VU University Medical Center, Amsterdam, the Netherlands
| | - Sander Cj Verfaillie
- Department of Radiology & Nuclear Medicine, Amsterdam Neuroscience, VU University Medical Center, Amsterdam, the Netherlands.,Department of Neurology & Alzheimer Center, Amsterdam Neuroscience, VU University Medical Center, Amsterdam, the Netherlands
| | - Ronald Boellaard
- Department of Radiology & Nuclear Medicine, Amsterdam Neuroscience, VU University Medical Center, Amsterdam, the Netherlands.,Department of Nuclear Medicine & Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands
| | - Sofie M Adriaanse
- Department of Radiology & Nuclear Medicine, Amsterdam Neuroscience, VU University Medical Center, Amsterdam, the Netherlands
| | - Marissa D Zwan
- Department of Neurology & Alzheimer Center, Amsterdam Neuroscience, VU University Medical Center, Amsterdam, the Netherlands
| | - Robert C Schuit
- Department of Radiology & Nuclear Medicine, Amsterdam Neuroscience, VU University Medical Center, Amsterdam, the Netherlands
| | - Tessa Timmers
- Department of Radiology & Nuclear Medicine, Amsterdam Neuroscience, VU University Medical Center, Amsterdam, the Netherlands.,Department of Neurology & Alzheimer Center, Amsterdam Neuroscience, VU University Medical Center, Amsterdam, the Netherlands
| | - Colin Groot
- Department of Radiology & Nuclear Medicine, Amsterdam Neuroscience, VU University Medical Center, Amsterdam, the Netherlands
| | - Patrick Schober
- Department of Anaesthesiology, Amsterdam Neuroscience, VU University Medical Center, Amsterdam, the Netherlands
| | - Philip Scheltens
- Department of Neurology & Alzheimer Center, Amsterdam Neuroscience, VU University Medical Center, Amsterdam, the Netherlands
| | - Wiesje M van der Flier
- Department of Neurology & Alzheimer Center, Amsterdam Neuroscience, VU University Medical Center, Amsterdam, the Netherlands.,Department of Epidemiology & Biostatistics, Amsterdam Neuroscience, VU University Medical Center, Amsterdam, the Netherlands
| | - Albert D Windhorst
- Department of Radiology & Nuclear Medicine, Amsterdam Neuroscience, VU University Medical Center, Amsterdam, the Netherlands
| | - Bart Nm van Berckel
- Department of Radiology & Nuclear Medicine, Amsterdam Neuroscience, VU University Medical Center, Amsterdam, the Netherlands
| | - Adriaan A Lammertsma
- Department of Radiology & Nuclear Medicine, Amsterdam Neuroscience, VU University Medical Center, Amsterdam, the Netherlands
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25
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Niedzwiedzka E, Wadolowska L, Kowalkowska J. Reproducibility of A Non-Quantitative Food Frequency Questionnaire (62-Item FFQ-6) and PCA-Driven Dietary Pattern Identification in 13-21-Year-Old Females. Nutrients 2019; 11:nu11092183. [PMID: 31514354 PMCID: PMC6770086 DOI: 10.3390/nu11092183] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Revised: 09/06/2019] [Accepted: 09/08/2019] [Indexed: 01/08/2023] Open
Abstract
The aim of this study was to evaluate the test-retest reproducibility of a non-quantitative food frequency questionnaire (acronym: 62-item FFQ-6) and the possibility of identifying dietary patterns (DPs) in 13-21-year-old females. The study involved 97 females within three age groups: 13-15, 16-18, and 19-21 years, including 31, 38, and 28 subjects, respectively. The questionnaire was completed twice with a two-week interval (test and retest). For the total sample, using a principal component analysis (PCA), two similar PCA-driven DPs (DP1 and DP2) were identified separately from test data and retest data, considering two sets of input variables. 60-item-DP1 and 60-item-DP2 were identified after excluding two items-vegetables and fruits in general-due to including single items of various kinds of vegetables and fruits. After an aggregation of some items of the questionnaire, 25-item-DP1 and 25-item-DP2 were identified. The kappa statistic (test vs. retest) in the total sample averaged at 0.52 (0.32-0.72 for food items), while within age groups, it averaged at 0.41, 0.53, and 0.65, respectively. The percentage of subjects classified into the same food frequency category (test vs. retest) in the total sample averaged at 68% (51%-89% for food items), while within age groups, it averaged at 60%, 68%, and 77%, respectively. The Spearman correlations between dietary pattern scores (test vs. retest) in the total sample were: 0.84 (within age groups 0.83, 0.81, and 0.78, respectively) for 60-item-DP1, 0.68 (within age groups 0.24, 0.79, and 0.76, respectively) for 60-item-DP2, 0.76 (within age groups 0.56, 0.82, and 0.89, respectively) for 25-item-DP1, and 0.48 (within age groups 0.40, 0.57, and 0.53, respectively) for 25-item-DP2 (p < 0.05 for all). In conclusion, the test-retest reproducibility of the 62-item FFQ-6 was good or very good for most food items, with a tendency to be higher in older age groups of females under study. Due to the acceptable-to-good reproducibility of dietary pattern identification, the use of a 62-item FFQ-6 to describe the overall diet of young Polish females can be recommended.
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Affiliation(s)
- Ewa Niedzwiedzka
- Department of Human Nutrition, University of Warmia and Mazury in Olsztyn, Sloneczna 45F, 10-718 Olsztyn, Poland
| | - Lidia Wadolowska
- Department of Human Nutrition, University of Warmia and Mazury in Olsztyn, Sloneczna 45F, 10-718 Olsztyn, Poland
| | - Joanna Kowalkowska
- Department of Human Nutrition, University of Warmia and Mazury in Olsztyn, Sloneczna 45F, 10-718 Olsztyn, Poland.
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26
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Wu Z, Cimetta R, Caruso E, Guymer RH. Performance of a Defect-Mapping Microperimetry Approach for Characterizing Progressive Changes in Deep Scotomas. Transl Vis Sci Technol 2019; 8:16. [PMID: 31388468 PMCID: PMC6675515 DOI: 10.1167/tvst.8.4.16] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 06/18/2019] [Indexed: 12/12/2022] Open
Abstract
Purpose To examine whether a microperimetry testing strategy based on quantifying the spatial extent of functional abnormalities (termed “defect-mapping” strategy) could improve the detection of progressive changes in deep scotomas compared to the conventional thresholding strategy. Methods A total of 30 healthy participants underwent two microperimetry examinations, each using the defect-mapping and thresholding strategies at the first visit to examine the test–retest variability of each method. Testing was performed using an isotropic stimulus pattern centered on the optic nerve head (ONH), which acted as a model of a deep scotoma. These tests were repeated at a second visit, except using a smaller stimulus pattern and thereby increasing the proportion of test locations falling within the ONH (to simulate the progressive enlargement of a deep scotoma). The extent of change detected between visits relative to measurement variability was compared between the two strategies. Results Relative to their effective dynamic ranges, the test–retest variability of the defect-mapping strategy (1.8%) was significantly lower compared to the thresholding strategy (3.3%; P < 0.001). The defect-mapping strategy also captured a significantly greater extent of change between visits relative to variability (−4.70 t−1) compared to the thresholding strategy (2.74 t−1; P < 0.001). Conclusions A defect-mapping microperimetry testing strategy shows promise for capturing the progressive enlargement of deep scotomas more effectively than the conventional thresholding strategy. Translational Relevance Microperimetry testing with the defect-mapping strategy could provide a more accurate clinical trial outcome measure for capturing progressive changes in deep scotomas in eyes with atrophic retinal diseases, warranting further investigations.
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Affiliation(s)
- Zhichao Wu
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, East Melbourne, Australia.,Ophthalmology, Department of Surgery, The University of Melbourne, Melbourne, Australia
| | - Roberta Cimetta
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, East Melbourne, Australia.,Ophthalmology, Department of Surgery, The University of Melbourne, Melbourne, Australia
| | - Emily Caruso
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, East Melbourne, Australia.,Ophthalmology, Department of Surgery, The University of Melbourne, Melbourne, Australia
| | - Robyn H Guymer
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, East Melbourne, Australia.,Ophthalmology, Department of Surgery, The University of Melbourne, Melbourne, Australia
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27
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Yuan JP, Henje Blom E, Flynn T, Chen Y, Ho TC, Connolly CG, Dumont Walter RA, Yang TT, Xu D, Tymofiyeva O. Test-Retest Reliability of Graph Theoretic Metrics in Adolescent Brains. Brain Connect 2018; 9:144-154. [PMID: 30398373 DOI: 10.1089/brain.2018.0580] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Graph theory analysis of structural brain networks derived from diffusion tensor imaging (DTI) has become a popular analytical method in neuroscience, enabling advanced investigations of neurological and psychiatric disorders. The purpose of this study was to investigate (1) the effects of edge weighting schemes and (2) the effects of varying interscan periods on graph metrics within the adolescent brain. We compared a binary (B) network definition with three weighting schemes: fractional anisotropy (FA), streamline count, and streamline count with density and length correction (SDL). Two commonly used global and two local graph metrics were examined. The analysis was conducted with two groups of adolescent volunteers who received DTI scans either 12 weeks apart (16.62 ± 1.10 years) or within the same scanning session (30 min apart) (16.65 ± 1.14 years). The intraclass correlation coefficient was used to assess test-retest reliability and the coefficient of variation (CV) was used to assess precision. On average, each edge scheme produced reliable results at both time intervals. Weighted measures outperformed binary measures, with SDL weights producing the most reliable metrics. All edge schemes except FA displayed high CV values, leaving FA as the only edge scheme that consistently showed high precision while also producing reliable results. Overall findings suggest that FA weights are more suited for DTI connectome studies in adolescents.
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Affiliation(s)
- Justin P Yuan
- 1 Department of Radiology & Biomedical Imaging, University of California, San Francisco, San Francisco, California
| | - Eva Henje Blom
- 2 Department of Clinical Science, Child- and Adolescent Psychiatry, Umeå University, Umeå, Sweden.,3 Department of Psychiatry and the Langley Porter Psychiatric Institute, Division of Child and Adolescent Psychiatry, University of California, San Francisco, San Francisco, California
| | - Trevor Flynn
- 1 Department of Radiology & Biomedical Imaging, University of California, San Francisco, San Francisco, California
| | - Yiran Chen
- 1 Department of Radiology & Biomedical Imaging, University of California, San Francisco, San Francisco, California
| | - Tiffany C Ho
- 3 Department of Psychiatry and the Langley Porter Psychiatric Institute, Division of Child and Adolescent Psychiatry, University of California, San Francisco, San Francisco, California.,4 Department of Psychiatry and Behavioral Sciences, Stanford University, Stanford, California
| | - Colm G Connolly
- 3 Department of Psychiatry and the Langley Porter Psychiatric Institute, Division of Child and Adolescent Psychiatry, University of California, San Francisco, San Francisco, California.,5 Department of Biomedical Sciences, Florida State University, Tallahassee, Florida
| | - Rebecca A Dumont Walter
- 1 Department of Radiology & Biomedical Imaging, University of California, San Francisco, San Francisco, California
| | - Tony T Yang
- 3 Department of Psychiatry and the Langley Porter Psychiatric Institute, Division of Child and Adolescent Psychiatry, University of California, San Francisco, San Francisco, California
| | - Duan Xu
- 1 Department of Radiology & Biomedical Imaging, University of California, San Francisco, San Francisco, California
| | - Olga Tymofiyeva
- 1 Department of Radiology & Biomedical Imaging, University of California, San Francisco, San Francisco, California
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28
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Kurland BF, Peterson LM, Shields AT, Lee JH, Byrd DW, Novakova-Jiresova A, Muzi M, Specht JM, Mankoff DA, Linden HM, Kinahan PE. Test-Retest Reproducibility of 18F-FDG PET/CT Uptake in Cancer Patients Within a Qualified and Calibrated Local Network. J Nucl Med 2018; 60:608-614. [PMID: 30361381 DOI: 10.2967/jnumed.118.209544] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Accepted: 10/01/2018] [Indexed: 11/16/2022] Open
Abstract
Calibration and reproducibility of quantitative 18F-FDG PET measures are essential for adopting integral 18F-FDG PET/CT biomarkers and response measures in multicenter clinical trials. We implemented a multicenter qualification process using National Institute of Standards and Technology-traceable reference sources for scanners and dose calibrators, and similar patient and imaging protocols. We then assessed SUV in patient test-retest studies. Methods: Five 18F-FDG PET/CT scanners from 4 institutions (2 in a National Cancer Institute-designated Comprehensive Cancer Center, 3 in a community-based network) were qualified for study use. Patients were scanned twice within 15 d, on the same scanner (n = 10); different but same model scanners within an institution (n = 2); or different model scanners at different institutions (n = 11). SUVmax was recorded for lesions, and SUVmean for normal liver uptake. Linear mixed models with random intercept were fitted to evaluate test-retest differences in multiple lesions per patient and to estimate the concordance correlation coefficient. Bland-Altman plots and repeatability coefficients were also produced. Results: In total, 162 lesions (82 bone, 80 soft tissue) were assessed in patients with breast cancer (n = 17) or other cancers (n = 6). Repeat scans within the same institution, using the same scanner or 2 scanners of the same model, had an average difference in SUVmax of 8% (95% confidence interval, 6%-10%). For test-retest on different scanners at different sites, the average difference in lesion SUVmax was 18% (95% confidence interval, 13%-24%). Normal liver uptake (SUVmean) showed an average difference of 5% (95% confidence interval, 3%-10%) for the same scanner model or institution and 6% (95% confidence interval, 3%-11%) for different scanners from different institutions. Protocol adherence was good; the median difference in injection-to-acquisition time was 2 min (range, 0-11 min). Test-retest SUVmax variability was not explained by available information on protocol deviations or patient or lesion characteristics. Conclusion: 18F-FDG PET/CT scanner qualification and calibration can yield highly reproducible test-retest tumor SUV measurements. Our data support use of different qualified scanners of the same model for serial studies. Test-retest differences from different scanner models were greater; more resolution-dependent harmonization of scanner protocols and reconstruction algorithms may be capable of reducing these differences to values closer to same-scanner results.
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Affiliation(s)
- Brenda F Kurland
- Department of Biostatistics, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Lanell M Peterson
- Division of Medical Oncology, University of Washington/Seattle Cancer Care Alliance, Seattle, Washington
| | - Andrew T Shields
- Department of Radiology, University of Washington, Seattle, Washington; and
| | - Jean H Lee
- Department of Radiology, University of Washington, Seattle, Washington; and
| | - Darrin W Byrd
- Department of Radiology, University of Washington, Seattle, Washington; and
| | - Alena Novakova-Jiresova
- Division of Medical Oncology, University of Washington/Seattle Cancer Care Alliance, Seattle, Washington
| | - Mark Muzi
- Department of Radiology, University of Washington, Seattle, Washington; and
| | - Jennifer M Specht
- Division of Medical Oncology, University of Washington/Seattle Cancer Care Alliance, Seattle, Washington
| | - David A Mankoff
- Department of Radiology, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Hannah M Linden
- Division of Medical Oncology, University of Washington/Seattle Cancer Care Alliance, Seattle, Washington
| | - Paul E Kinahan
- Department of Radiology, University of Washington, Seattle, Washington; and
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29
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Jeannis H, Goldberg M, Seelman K, Schmeler M, Cooper RA. Participation in science and engineering laboratories for students with physical disabilities: survey development and psychometrics. Disabil Rehabil Assist Technol 2018; 14:692-709. [PMID: 30317937 DOI: 10.1080/17483107.2018.1499049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Purpose: The purpose of this study is to address the development of the Full Participation Science and Engineering Accessibility (FPSEA) self-report survey that gathers experiences from students with physical disabilities (SwD-P) using a postsecondary laboratory and to evaluate the survey's stability. Methods: Survey items were generated from an extensive literature review and recommendations articulated by experts. Think-aloud sessions and content validity index (CVI) were used to determine survey content validity and help finalize survey items. Individuals with physical disabilities (n = 20) who have taken a postsecondary science or engineering laboratory course completed the survey and took it again 10-14 days apart. The test-retest reliability was assessed using Spearman Rho coefficients for Likert-scale items, Chi-square and Fisher's exact test for the dichotomous items. Missing data completely at random (MCAR) test was computed before reliability data analysis. Results: Each sub-item passed the MCAR test, indicating that the data are missing completely at random and can be imputed to perform the analysis. Reliability analysis was completed on 20 individuals. The FPSEA had good content reliability: the item-level CVI of items kept ranged from 0.86 to 1. The scale-level CVI was 0.94. Stability was demonstrated with adequate Spearman correlation ranged from 0.56 to 0.86. Conclusions: No previous survey had been developed linking SwD-P and the postsecondary science and engineering (S&E) laboratory setting prior to this work. Overall, FPSEA is reliable and stable for reporting the barriers and facilitators to use S&E laboratories from the SwD-P's perspective. Implications for rehabilitation The barriers students with disabilities encounter in S&E laboratory environments are largely unknown. The FPSEA survey may help identify barriers and facilitators to using S&E laboratories for SwD-P. The FPSEA Survey allows former and current SwD-P to share their experiences using a postsecondary S&E instructional laboratory.
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Affiliation(s)
- H Jeannis
- a Department of Rehabilitation Science and Technology, University of Pittsburgh , Pittsburgh , PA , USA.,b Human Engineering Research Laboratories, Department of Veterans Affairs , Pittsburgh , PA , USA
| | - M Goldberg
- a Department of Rehabilitation Science and Technology, University of Pittsburgh , Pittsburgh , PA , USA.,b Human Engineering Research Laboratories, Department of Veterans Affairs , Pittsburgh , PA , USA
| | - K Seelman
- a Department of Rehabilitation Science and Technology, University of Pittsburgh , Pittsburgh , PA , USA
| | - M Schmeler
- a Department of Rehabilitation Science and Technology, University of Pittsburgh , Pittsburgh , PA , USA
| | - R A Cooper
- a Department of Rehabilitation Science and Technology, University of Pittsburgh , Pittsburgh , PA , USA.,b Human Engineering Research Laboratories, Department of Veterans Affairs , Pittsburgh , PA , USA
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30
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Abstract
The developmental eye movement (DEM) test is a practical and simple method for assessing and quantifying ocular motor skills in children. Different studies have previously assessed the reliability of the DEM test and they have generally found high values for vertical and horizontal time, whereas those for Ratio and Errors were medium and low, respectively. In the second application of test were found an improvement in performance in all subtests. Our aim was to evaluate the reliability of the DEM test using seconds and percentile scoring and looking in depth at the improvement in performance when the test is repeated. We tested the reliability of the DEM test on a group of 115 children from the 2nd to the 5th grade using different statistical methods: correlations, ANOVA, limits of agreement for results expressed in seconds and as percentile scoring and pass-fail diagnostic classification. We found high reliability with excellent values for vertical and adjusted horizontal time, medium-to-high for ratio and medium for errors. We have re-confirmed the presence of a significant improvement of performance on the second session for vertical time, horizontal time and ratio. The stability of binary classification of Pass–Fail criteria appears to be medium. We found high reliability for the DEM test when compared with the published results of other research but the improvement of performance, the learning effect was still present, but at a lower level than previously found. With the awareness of these limitations the DEM test can be used in clinical practice in evaluating performance over time.
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Affiliation(s)
- Alessio Facchin
- Department of Psychology, University of Milano-Bicocca, Milan, Italy.,COMiB - Research Center in Optics and Optometry, University of Milano-Bicocca, Milan, Italy.,NeuroMi - Milan Center for Neuroscience, Milan, Italy.,IRSOO - Institute for Research and Studies in Optics and Optometry, Vinci, Italy
| | - Silvio Maffioletti
- IRSOO - Institute for Research and Studies in Optics and Optometry, Vinci, Italy.,Optics and Optometry, University of Turin, Turin, Italy
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31
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Kerry MJ. Empirical Tryout of a New Statistic for Detecting Temporally Inconsistent Responders. Front Psychol 2018; 9:518. [PMID: 29692754 PMCID: PMC5902740 DOI: 10.3389/fpsyg.2018.00518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2017] [Accepted: 03/27/2018] [Indexed: 12/05/2022] Open
Abstract
Statistical screening of self-report data is often advised to support the quality of analyzed responses – For example, reduction of insufficient effort responding (IER). One recently introduced index based on Mahalanobis’s D for detecting outliers in cross-sectional designs replaces centered scores with difference scores between repeated-measure items: Termed person temporal consistency (D2ptc). Although the adapted D2ptc index demonstrated usefulness in simulation datasets, it has not been applied to empirical data. The current study addresses D2ptc’s low uptake by critically appraising its performance across three empirical applications. Independent samples were selected to represent a range of scenarios commonly encountered by organizational researchers. First, in Sample 1, a repeat-measure of future time perspective (FTP) inexperienced working adults (age >40-years; n = 620) indicated that temporal inconsistency was significantly related to respondent age and item reverse-scoring. Second, in repeat-measure of team efficacy aggregations, D2ptc successfully detected team-level inconsistency across repeat-performance cycles. Thirdly, the usefulness of the D2ptc was examined in an experimental study dataset of subjective life expectancy indicated significantly more stable responding in experimental conditions compared to controls. The empirical findings support D2ptc’s flexible and useful application to distinct study designs. Discussion centers on current limitations and further extensions that may be of value to psychologists screening self-report data for strengthening response quality and meaningfulness of inferences from repeated-measures self-reports. Taken together, the findings support the usefulness of the newly devised statistic for detecting IER and other extreme response patterns.
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Affiliation(s)
- Matthew J Kerry
- Department of Management, Technology and Economics, The Swiss Federal Institute of Technology, Zurich, Switzerland
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Abstract
OBJECTIVES The Snap & Sniff® Threshold Test (S&S) has been recently developed to determine the olfactory threshold. The aim of this study was to further evaluate the validity and test-retest reliability of the S&S. METHODS The olfactory thresholds of 120 participants were determined using both the Smell Threshold Test (STT) and the S&S. The participants included 30 normosmic volunteers and 90 patients (60 hyposmic, 30 anosmic). The normosmic participants were retested using the STT and S&S at an intertest interval of at least 1 day. RESULTS The mean olfactory threshold determined with the S&S was -6.76 for the normosmic participants, -3.79 for the hyposmic patients, and -2 for the anosmic patients. The olfactory thresholds were significantly different across the 3 groups ( P < .001). Snap & Sniff-based and STT-based olfactory thresholds were correlated weakly in the normosmic group (correlation coefficient = 0.162, P = .391) but more strongly correlated in the patient groups (hyposmic: correlation coefficient = 0.376, P = .003; anosmic: correlation coefficient = 1.0). The test-retest correlation for the S&S-based olfactory thresholds was 0.384 ( P = .036). CONCLUSION Based on validity and test-retest reliability, we concluded that the S&S is a proper test for olfactory thresholds.
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Affiliation(s)
- Rong-San Jiang
- 1 Department of Medical Research, Taichung Veterans General Hospital, Taichung, Taiwan.,2 Department of Otolaryngology, Taichung Veterans General Hospital, Taichung, Taiwan.,3 School of Medicine, Chung Shan Medical University, Taichung, Taiwan.,4 Department of Nursing, HungKuang University, Taichung, Taiwan
| | - Kai-Li Liang
- 2 Department of Otolaryngology, Taichung Veterans General Hospital, Taichung, Taiwan.,3 School of Medicine, Chung Shan Medical University, Taichung, Taiwan.,5 Faculty of Medicine, National Yang-Ming Medical University, Taipei, Taiwan
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Di X, Biswal BB. Psychophysiological Interactions in a Visual Checkerboard Task: Reproducibility, Reliability, and the Effects of Deconvolution. Front Neurosci 2017; 11:573. [PMID: 29089865 PMCID: PMC5651039 DOI: 10.3389/fnins.2017.00573] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Accepted: 10/02/2017] [Indexed: 11/18/2022] Open
Abstract
Psychophysiological interaction (PPI) is a regression based method to study task modulated brain connectivity. Despite its popularity in functional MRI (fMRI) studies, its reliability and reproducibility have not been evaluated. We investigated reproducibility and reliability of PPI effects during a simple visual task, and examined the effect of deconvolution on the PPI results. A large open-access dataset was analyzed (n = 138), where a visual task was scanned twice with repetition times (TRs) of 645 and 1,400 ms, respectively. We first replicated our previous results by using the left and right middle occipital gyrus as seeds. Then regions of interest (ROI)-wise analysis was performed among 20 visual-related thalamic and cortical regions, and negative PPI effects were found between many ROIs with the posterior fusiform gyrus as a hub region. Both the seed-based and ROI-wise results were similar between the two runs and between the two PPI methods with and without deconvolution. The non-deconvolution method and the short TR run in general had larger effect sizes and greater extents. However, the deconvolution method performed worse in the 645 ms TR run than the 1,400 ms TR run in the voxel-wise analysis. Given the general similar results between the two methods and the uncertainty of deconvolution, we suggest that deconvolution may be not necessary for PPI analysis on block-designed data. Lastly, intraclass correlations (ICC) between the two runs were much lower for the PPI effects than the activation main effects, which raise cautions on performing inter-subject correlations and group comparisons on PPI effects.
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Affiliation(s)
- Xin Di
- Department of Biomedical Engineering, New Jersey Institute of Technology, Newark, NJ, United States
| | - Bharat B Biswal
- Department of Biomedical Engineering, New Jersey Institute of Technology, Newark, NJ, United States
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Adhikarla V, Dunlop BW, Jarkas N, Goodman MM, Mayberg H, Owens MJ, Nye JA. Test-Retest Reliability of the SERT Imaging Agent 11C-HOMADAM in Healthy Humans. J Nucl Med 2017; 59:315-319. [PMID: 28935840 DOI: 10.2967/jnumed.117.196915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Accepted: 07/18/2017] [Indexed: 11/16/2022] Open
Abstract
The aim of this study was to measure the test-retest reliability of 11C-N,N-dimethyl-2-(2'-amino-4'-hydroxymethylphenylthio)benzylamine (11C-HOMADAM) imaging of serotonin transporter (SERT) density in healthy control subjects. Methods: Two female and 2 male volunteers participated in the study, with each undergoing three 90-min 11C-HOMADAM PET scans. Time-activity curves were derived from SERT-rich structures and fit to 2 models: a simplified reference tissue model and a multilinear graphical model. Binding potential, the ratio of specifically bound uptake to nondisplaceable uptake at equilibrium, was calculated from the model parameter estimates. Ninety-five percent confidence intervals and the intraclass correlation coefficient (ICC) were calculated and adjusted for repeated measures. Results: The ICC values ranged from -0.13 in the dorsal raphe to 0.88 in the caudate nucleus. The highest average ICC values were in the striatum, but other regions were sensitive to measurement outliers. Conclusion: Good-to-excellent test-retest reliability was observed for SERT binding in the striatum. The dorsal raphe ICC value was sensitive to a measurement outlier. 11C-HOMADAM binding potential calculated from the simplified reference tissue model and the multilinear graphical model were robust and in good agreement.
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Affiliation(s)
- Vikram Adhikarla
- Department of Radiology and Imaging Sciences, Emory University, Atlanta, Georgia; and
| | - Boadie W Dunlop
- Department of Psychiatry and Behavioral Sciences, Emory University, Atlanta, Georgia
| | - Nashwa Jarkas
- Department of Radiology and Imaging Sciences, Emory University, Atlanta, Georgia; and
| | - Mark M Goodman
- Department of Radiology and Imaging Sciences, Emory University, Atlanta, Georgia; and.,Department of Psychiatry and Behavioral Sciences, Emory University, Atlanta, Georgia
| | - Helen Mayberg
- Department of Psychiatry and Behavioral Sciences, Emory University, Atlanta, Georgia
| | - Michael J Owens
- Department of Psychiatry and Behavioral Sciences, Emory University, Atlanta, Georgia
| | - Jonathon A Nye
- Department of Radiology and Imaging Sciences, Emory University, Atlanta, Georgia; and
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DeLorenzo C, Gallezot JD, Gardus J, Yang J, Planeta B, Nabulsi N, Ogden RT, Labaree DC, Huang YH, Mann JJ, Gasparini F, Lin X, Javitch JA, Parsey RV, Carson RE, Esterlis I. In vivo variation in same-day estimates of metabotropic glutamate receptor subtype 5 binding using [ 11C]ABP688 and [ 18F]FPEB. J Cereb Blood Flow Metab 2017; 37:2716-2727. [PMID: 27742888 PMCID: PMC5536783 DOI: 10.1177/0271678x16673646] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 08/02/2016] [Accepted: 09/12/2016] [Indexed: 01/11/2023]
Abstract
Positron emission tomography tracers [11C]ABP688 and [18F]FPEB target the metabotropic glutamate receptor subtype 5 providing quantification of the brain glutamatergic system in vivo. Previous [11C]ABP688 positron emission tomography human test-retest studies indicate that, when performed on the same day, significant binding increases are observed; however, little deviation is reported when scans are >7 days apart. Due to the small cohorts examined previously (eight and five males, respectively), we aimed to replicate the same-day test-retest studies in a larger cohort including both males and females. Results confirmed large within-subject binding differences (ranging from -23% to 108%), suggesting that measurements are greatly affected by study design. We further investigated whether this phenomenon was specific to [11C]ABP688. Using [18F]FPEB and methodology that accounts for residual radioactivity from the test scan, four subjects were scanned twice on the same day. In these subjects, binding estimates increased between 5% and 39% between scans. Consistent with [11C]ABP688, mean absolute test-retest variability was previously reported as <12% when scans were >21 days apart. This replication study and pilot extension to [18F]FPEB suggest that observed within-day binding variation may be due to characteristics of mGluR5; for example, diurnal variation in mGluR5 may affect measurement of this receptor.
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Affiliation(s)
- Christine DeLorenzo
- Department of Psychiatry, Stony Brook University, Stony Brook, USA
- Department of Biomedical Engineering, Stony Brook University, Stony Brook, USA
- Department of Psychiatry, Columbia University, New York, USA
| | | | - John Gardus
- Department of Psychiatry, Stony Brook University, Stony Brook, USA
| | - Jie Yang
- Department of Preventive Medicine, Stony Brook University, Stony Brook, USA
| | - Beata Planeta
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, USA
| | - Nabeel Nabulsi
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, USA
| | - R Todd Ogden
- Department of Psychiatry, Columbia University, New York, USA
| | - David C Labaree
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, USA
| | - Yiyun H Huang
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, USA
| | - J John Mann
- Department of Psychiatry, Columbia University, New York, USA
| | | | - Xin Lin
- Department of Psychiatry, Columbia University, New York, USA
- Division of Molecular Therapeutics, New York State Psychiatric Institute, New York, USA
| | - Jonathan A Javitch
- Department of Psychiatry, Columbia University, New York, USA
- Division of Molecular Therapeutics, New York State Psychiatric Institute, New York, USA
- Department of Pharmacology, Columbia University, New York, USA
| | - Ramin V Parsey
- Department of Psychiatry, Stony Brook University, Stony Brook, USA
- Department of Biomedical Engineering, Stony Brook University, Stony Brook, USA
- Department of Radiology, Stony Brook University, Stony Brook, USA
| | - Richard E Carson
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, USA
- Department of Biomedical Engineering, Yale University, New Haven, USA
| | - Irina Esterlis
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, USA
- Department of Psychiatry, Yale University, New Haven, USA
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Hofheinz F, Apostolova I, Oehme L, Kotzerke J, van den Hoff J. Test-Retest Variability in Lesion SUV and Lesion SUR in 18F-FDG PET: An Analysis of Data from Two Prospective Multicenter Trials. J Nucl Med 2017; 58:1770-1775. [PMID: 28473598 DOI: 10.2967/jnumed.117.190736] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Accepted: 04/14/2017] [Indexed: 01/20/2023] Open
Abstract
Quantitative assessment of radio- and chemotherapy response with 18F-FDG whole-body PET has attracted increasing interest in recent years. In most published work, SUV has been used for this purpose. In the context of therapy response assessment, the reliability of lesion SUVs, notably their test-retest stability, thus becomes crucial. However, a recent study demonstrated substantial test-retest variability (TRV) in SUVs. The purpose of the present study was to investigate whether the tumor-to-blood SUV ratio (SUR) can improve TRV in tracer uptake. Methods: 73 patients with advanced non-small cell lung cancer from the prospective multicenter trials ACRIN 6678 (n = 34) and MK-0646-008 (n = 39) were included in this study. All patients underwent two 18F-FDG PET/CT investigations on two different days (time difference, 3.6 ± 2.1 d; range, 1-7 d) before therapy. For each patient, up to 7 tumor lesions were evaluated. For each lesion, SUVmax and SUVpeak were determined. Blood SUV was determined as the mean value of a 3-dimensional aortic region of interest that was delineated on the attenuation CT image and transferred to the PET image. SURs were computed as the ratio of tumor SUV to blood SUV and were uptake time-corrected to 75 min after injection. TRV was quantified as 1.96 multiplied by the root-mean-square deviation of the fractional paired differences in SUV and SUR. The combined effect of blood normalization and uptake time correction was inspected by considering RTRV (TRVSUR/TRVSUV), a ratio reflecting the reduction in the TRV in SUR relative to SUV. RTRV was correlated with the group-averaged-value difference (δ) in CFmean (δCFmean) of the quantity δCF = |CF - 1|, where CF is the numeric factor that converts individual ratios of paired SUVs into corresponding SURs. This correlation analysis was performed by successively increasing a threshold value δCFmin and computing δCFmean and RTRV for the remaining subgroup of patients/lesions with δCF ≥ δCFminResults: The group-averaged TRVSUV and TRVSUR were 32.1 and 29.0, respectively, which correspond to a reduction of variability in SUR by an RTRV factor of 0.9 in comparison to SUV. This rather marginal improvement can be understood to be a consequence of the atypically low intrasubject variability in blood SUV and uptake time and the accordingly small δCF values in the investigated prospective study groups. In fact, subgroup analysis with increasing δCFmin thresholds revealed a pronounced negative correlation (Spearman ρ = -0.99, P < 0.001) between RTRV and δCFmean, where RTRV ≈ 0.4 in the δCFmin = 20% subgroup, corresponding to a more than 2-fold reduction of TRVSUR compared with TRVSUVConclusion: Variability in blood SUV and uptake time has been identified as a causal factor in the TRV in lesion SUV. Therefore, TRV in lesion uptake measurements can be reduced by replacing SUV with SUR as the uptake measure. The improvement becomes substantial for the level of variability in blood SUV and uptake time typically observed in the clinical context.
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Affiliation(s)
- Frank Hofheinz
- Helmholtz-Zentrum Dresden-Rossendorf, PET Center, Institute of Radiopharmaceutical Cancer Research, Dresden, Germany
| | - Ivayla Apostolova
- Klinik für Radiologie Nuklearmedizin, Universitätsklinikum Magdeburg A.ö.R., Magdeburg, Germany; and
| | - Liane Oehme
- Department of Nuclear Medicine, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Jörg Kotzerke
- Department of Nuclear Medicine, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Jörg van den Hoff
- Helmholtz-Zentrum Dresden-Rossendorf, PET Center, Institute of Radiopharmaceutical Cancer Research, Dresden, Germany.,Department of Nuclear Medicine, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
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Abstract
OBJECTIVE To estimate normative values and repeatability of thresholds for the TEN(HL) test for diagnosing dead regions in the cochlea, as a function of signal frequency, TEN(HL) level, age and gender. DESIGN The TEN(HL) test was administered twice for each ear of each participant using signal frequencies from 0.5 to 4 kHz and TEN(HL) levels of 30, 50 and 70 dB HL/ERBN. STUDY SAMPLE In all, 29 young participants and 8 older participants were tested. All had normal audiograms with no history of hearing problems. RESULTS There was good repeatability across sessions. There was no significant effect of ear, gender or age group. The average signal-to-TEN ratio (STR) at threshold was close to 0 dB. For low signal frequencies, the STR at threshold varied only slightly with TEN(HL) level, but for the signal frequencies of 3 and 4 kHz the STR at threshold increased to about +2.7 dB for the TEN(HL) level of 70 dB/ERBN. CONCLUSIONS For a high TEN(HL) level, the "normal" STR at threshold at 3 and 4 kHz is closer to +2 dB than to 0 dB. Further research is needed to assess whether the TEN(HL)-test criteria need to be modified when testing at high frequencies and high levels.
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Affiliation(s)
- Andreas S Hansen
- a Audiology Program, Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences , Norwegian University of Science and Technology (NTNU) , Trondheim , Norway and
| | - Øyvind Raen
- a Audiology Program, Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences , Norwegian University of Science and Technology (NTNU) , Trondheim , Norway and
| | - Brian C J Moore
- b Department of Experimental Psychology , University of Cambridge , Cambridge , UK
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van Timmeren JE, Leijenaar RTH, van Elmpt W, Wang J, Zhang Z, Dekker A, Lambin P. Test-Retest Data for Radiomics Feature Stability Analysis: Generalizable or Study-Specific? ACTA ACUST UNITED AC 2016; 2:361-365. [PMID: 30042967 PMCID: PMC6037932 DOI: 10.18383/j.tom.2016.00208] [Citation(s) in RCA: 106] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Radiomics is an objective method for extracting quantitative information from medical images. However, in radiomics, standardization, overfitting, and generalization are major challenges to be overcome. Test–retest experiments can be used to select robust radiomic features that have minimal variation. Currently, it is unknown whether they should be identified for each disease (disease specific) or are only imaging device-specific (computed tomography [CT]-specific). Here, we performed a test–retest analysis on CT scans of 40 patients with rectal cancer in a clinical setting. Correlation between radiomic features was assessed using the concordance correlation coefficient (CCC). In total, only 9/542 features have a CCC > 0.85. Furthermore, results were compared with the test–retest results on CT scans of 27 patients with lung cancer with a 15-minute interval. Results show that 446/542 features have a higher CCC for the test–retest analysis of the data set of patients with lung cancer than for patients with rectal cancer. The importance of controlling factors such as scanners, imaging protocol, reconstruction methods, and time points in a radiomics analysis is shown. Moreover, the results imply that test–retest analyses should be performed before each radiomics study. More research is required to independently evaluate the effect of each factor.
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Affiliation(s)
- Janna E van Timmeren
- Department of Radiation Oncology (MAASTRO), GROW-School for Oncology and Developmental Biology, Maastricht University Medical Centre (MUMC), Maastricht, The Netherlands
| | - Ralph T H Leijenaar
- Department of Radiation Oncology (MAASTRO), GROW-School for Oncology and Developmental Biology, Maastricht University Medical Centre (MUMC), Maastricht, The Netherlands
| | - Wouter van Elmpt
- Department of Radiation Oncology (MAASTRO), GROW-School for Oncology and Developmental Biology, Maastricht University Medical Centre (MUMC), Maastricht, The Netherlands
| | - Jiazhou Wang
- Department of Radiation Oncology, Fudan University Shanghai Cancer Center, China; and.,Department of Oncology, Shanghai Medical College, Fudan University, China
| | - Zhen Zhang
- Department of Radiation Oncology, Fudan University Shanghai Cancer Center, China; and.,Department of Oncology, Shanghai Medical College, Fudan University, China
| | - André Dekker
- Department of Radiation Oncology (MAASTRO), GROW-School for Oncology and Developmental Biology, Maastricht University Medical Centre (MUMC), Maastricht, The Netherlands
| | - Philippe Lambin
- Department of Radiation Oncology (MAASTRO), GROW-School for Oncology and Developmental Biology, Maastricht University Medical Centre (MUMC), Maastricht, The Netherlands
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Arlinghaus LR, Dortch RD, Whisenant JG, Kang H, Abramson RG, Yankeelov TE. Quantitative Magnetization Transfer Imaging of the Breast at 3.0 T: Reproducibility in Healthy Volunteers. ACTA ACUST UNITED AC 2016; 2:260-266. [PMID: 28090588 PMCID: PMC5228602 DOI: 10.18383/j.tom.2016.00142] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Quantitative magnetization transfer magnetic resonance imaging provides a means for indirectly detecting changes in the macromolecular content of tissue noninvasively. A potential application is the diagnosis and assessment of treatment response in breast cancer; however, before quantitative magnetization transfer imaging can be reliably used in such settings, the technique's reproducibility in healthy breast tissue must be established. Thus, this study aims to establish the reproducibility of the measurement of the macromolecular-to-free water proton pool size ratio (PSR) in healthy fibroglandular (FG) breast tissue. Thirteen women with no history of breast disease were scanned twice within a single scanning session, with repositioning between scans. Eleven women had appreciable FG tissue for test–retest measurements. Mean PSR values for the FG tissue ranged from 9.5% to 16.7%. The absolute value of the difference between 2 mean PSR measurements for each volunteer ranged from 0.1% to 2.1%. The 95% confidence interval for the mean difference was ±0.75%, and the repeatability value was 2.39%. These results indicate that the expected measurement variability would be ±0.75% for a cohort of a similar size and would be ±2.39% for an individual, suggesting that future studies of change in PSR in patients with breast cancer are feasible.
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Affiliation(s)
- Lori R Arlinghaus
- Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Richard D Dortch
- Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, Tennessee; Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, Tennessee; Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee
| | - Jennifer G Whisenant
- Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Hakmook Kang
- Department of Biostatistics, Vanderbilt University Medical Center, Nashville, Tennessee; Center for Quantitative Sciences, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Richard G Abramson
- Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, Tennessee; Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, Tennessee; Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Thomas E Yankeelov
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas; Department of Internal Medicine, The University of Texas at Austin, Austin, Texas; Institute for Computational and Engineering Sciences, The University of Texas at Austin, Austin, Texas; Livestrong Cancer Institutes, The University of Texas at Austin, Austin, Texas
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Bisio A, Pedullà L, Bonzano L, Ruggeri P, Brichetto G, Bove M. Evaluation of Handwriting Movement Kinematics: From an Ecological to a Magnetic Resonance Environment. Front Hum Neurosci 2016; 10:488. [PMID: 27746727 PMCID: PMC5040726 DOI: 10.3389/fnhum.2016.00488] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Accepted: 09/14/2016] [Indexed: 11/24/2022] Open
Abstract
Writing is a means of communication which requires complex motor, perceptual, and cognitive skills. If one of these abilities gets lost following traumatic events or due to neurological diseases, handwriting could deteriorate. Occupational therapy practitioners provide rehabilitation services for people with impaired handwriting. However, to determine the effectiveness of handwriting interventions no studies assessed whether the proposed treatments improved the kinematics of writing movement or had an effect at the level of the central nervous system. There is need to find new quantitative methodologies able to describe the behavioral and the neural outcomes of the rehabilitative interventions for handwriting. In the present study we proposed a combined approach that allowed evaluating the kinematic parameters of handwriting movements, acquired by means of a magnetic resonance-compatible tablet, and their neural correlates obtained simultaneously from a functional magnetic resonance imaging examination. Results showed that the system was reliable in term of reproducibility of the kinematic data during a test/re-test procedure. Further, despite the modifications with respect to an ecological writing movement condition, the kinematic parameters acquired inside the MR-environment were descriptive of individuals’ movement features. At last, the imaging protocol succeeded to show the activation of the cerebral regions associated with the production of writing movement in healthy people. From these findings, this methodology seems to be promising to evaluate the handwriting movement deficits and the potential alterations in the neural activity in those individuals who have handwriting difficulties. Finally, it would provide a mean to quantitatively assess the effect of a rehabilitative treatment.
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Affiliation(s)
- Ambra Bisio
- Department of Experimental Medicine, Section of Human Physiology and Centro Polifunzionale di Scienze Motorie, University of Genoa Genoa, Italy
| | - Ludovico Pedullà
- Department of Experimental Medicine, Section of Human Physiology and Centro Polifunzionale di Scienze Motorie, University of GenoaGenoa, Italy; Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, University of GenoaGenoa, Italy
| | - Laura Bonzano
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, University of Genoa Genoa, Italy
| | - Piero Ruggeri
- Department of Experimental Medicine, Section of Human Physiology and Centro Polifunzionale di Scienze Motorie, University of Genoa Genoa, Italy
| | - Giampaolo Brichetto
- Scientific Research Area, Italian Multiple Sclerosis Foundation Genoa, Italy
| | - Marco Bove
- Department of Experimental Medicine, Section of Human Physiology and Centro Polifunzionale di Scienze Motorie, University of Genoa Genoa, Italy
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Duc DM, Bergström A, Eriksson L, Selling K, Thi Thu Ha B, Wallin L. Response process and test-retest reliability of the Context Assessment for Community Health tool in Vietnam. Glob Health Action 2016; 9:31572. [PMID: 27293124 PMCID: PMC4904068 DOI: 10.3402/gha.v9.31572] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Revised: 04/17/2016] [Accepted: 04/19/2016] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND The recently developed Context Assessment for Community Health (COACH) tool aims to measure aspects of the local healthcare context perceived to influence knowledge translation in low- and middle-income countries. The tool measures eight dimensions (organizational resources, community engagement, monitoring services for action, sources of knowledge, commitment to work, work culture, leadership, and informal payment) through 49 items. OBJECTIVE The study aimed to explore the understanding and stability of the COACH tool among health providers in Vietnam. DESIGNS To investigate the response process, think-aloud interviews were undertaken with five community health workers, six nurses and midwives, and five physicians. Identified problems were classified according to Conrad and Blair's taxonomy and grouped according to an estimation of the magnitude of the problem's effect on the response data. Further, the stability of the tool was examined using a test-retest survey among 77 respondents. The reliability was analyzed for items (intraclass correlation coefficient (ICC) and percent agreement) and dimensions (ICC and Bland-Altman plots). RESULTS In general, the think-aloud interviews revealed that the COACH tool was perceived as clear, well organized, and easy to answer. Most items were understood as intended. However, seven prominent problems in the items were identified and the content of three dimensions was perceived to be of a sensitive nature. In the test-retest survey, two-thirds of the items and seven of eight dimensions were found to have an ICC agreement ranging from moderate to substantial (0.5-0.7), demonstrating that the instrument has an acceptable level of stability. CONCLUSIONS This study provides evidence that the Vietnamese translation of the COACH tool is generally perceived to be clear and easy to understand and has acceptable stability. There is, however, a need to rephrase and add generic examples to clarify some items and to further review items with low ICC.
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Affiliation(s)
- Duong M Duc
- Faculty of Social Science - Behaviours and Health Education, Hanoi School of Public Health, Hanoi, Vietnam.,International Maternal and Child Health, Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden;
| | - Anna Bergström
- International Maternal and Child Health, Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden.,Institute for Global Health, University College London, London, UK
| | - Leif Eriksson
- International Maternal and Child Health, Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden
| | - Katarina Selling
- International Maternal and Child Health, Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden
| | - Bui Thi Thu Ha
- Faculty of Social Science - Behaviours and Health Education, Hanoi School of Public Health, Hanoi, Vietnam
| | - Lars Wallin
- School of Education, Health and Social Studies, Dalarna University, Falun, Sweden.,Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
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Turner KV, Moreton BM, Walsh DA, Lincoln NB. Reliability and responsiveness of measures of pain in people with osteoarthritis of the knee: a psychometric evaluation. Disabil Rehabil 2016; 39:822-829. [PMID: 27027698 PMCID: PMC5327871 DOI: 10.3109/09638288.2016.1161840] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Purpose: To examine the fit between data from the Short Form McGill Pain Questionnaire (SF-MPQ-2) and the Rasch model, and to explore the reliability and internal responsiveness of measures of pain in people with knee osteoarthritis. Methods: Participants with knee osteoarthritis completed the SF-MPQ-2, Intermittent and Constant Osteoarthritis Pain questionnaire (ICOAP) and painDETECT. Participants were sent the same questionnaires 3 and 6 months later. Results: Fit to the Rasch model was not achieved for the SF-MPQ-2 Total scale. The Continuous subscale yielded adequate fit statistics after splitting item 10 on uniform DIF for gender, and removing item 9. The Intermittent subscale fit the Rasch model after rescoring items. The Neuropathic subscale had relatively good fit to the model. Test–retest reliability was satisfactory for most scales using both original and Rasch scoring ranging from fair to substantial. Effect sizes ranged from 0.13 to 1.79 indicating good internal responsiveness for most scales. Conclusions: These findings support the use of ICOAP subscales as reliable and responsive measure of pain in people with knee osteoarthritis. The MPQ-SF-2 subscales found to be acceptable alternatives. Implications for Rehabilitation The McGill Pain Questionnaire short version 2 is not a unidimensional scale in people with knee osteoarthritis, whereas three of the subscales are unidimensional. The McGill Pain Questionnaire short version 2 Affective subscale does not have good measurement properties for people with knee osteoarthritis. The McGill Pain Questionnaire short version 2 and the Intermittent and Constant Osteoarthritis Pain scales can be used to assess change over time. The painDETECT performs better as a screening measure than as an outcome measure.
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Affiliation(s)
- Katie V Turner
- a Arthritis Research UK Pain Centre , University of Nottingham , Nottingham , UK
| | - Bryan M Moreton
- a Arthritis Research UK Pain Centre , University of Nottingham , Nottingham , UK
| | - David A Walsh
- a Arthritis Research UK Pain Centre , University of Nottingham , Nottingham , UK
| | - Nadina B Lincoln
- a Arthritis Research UK Pain Centre , University of Nottingham , Nottingham , UK
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Funk L, Thiessen D, Wright V, Andrysek J, Rispin K. Reliability and validity of the Lower Limb Function Questionnaire when completed by young adult orthotic and prosthetic device users. Disabil Rehabil Assist Technol 2016; 12:262-271. [PMID: 26883010 DOI: 10.3109/17483107.2015.1129458] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Purpose The Lower Limb Function Questionnaire (LLFQ) was developed as a self-report assessment of lower-limb functional ability for orthotic and prosthetic (O&P) device users to be suitable for a wide range of conditions, cultures, and ages. The measure aims to address an existing gap in tools for the assessment of functional ability in this population. The purpose of this study is to evaluate LLFQ reliability and validity in a sample of young adult O&P users. Methods Adolescents from a secondary school in Kenya completed the LLFQ twice, 6 d apart, and test-retest reliability was assessed using intra-class correlation coefficients. Validity evaluations involved Timed Up-and-Go, 6-min walk, 6-min obstacle course, and/or spatiotemporal gait assessments. Oxygen consumption was measured during walk tests. Associations between the LLFQ and each measure were evaluated using Pearson correlation coefficients for construct validity. Results LLFQ reliability was acceptable (ICC = 0.79, 95% CIs 0.64-0.89). Construct validity was demonstrated via moderate correlation (r > 0.60) with obstacle course distance, gait velocity, stride length, and stance/single support/double support percent of gait cycle. Conclusions Both LLFQ reliability and validity were acceptable in the sample of youth in Kenya. Further testing is required to determine applicability in other cultural contexts. Implications for Rehabilitation The LLFQ may be clinically useful across a variety of cultures and conditions to provide feedback on the effectiveness of rehabilitative treatment or assistive devices for youth with lower limb impairments. The LLFQ may enable specific strengths and challenges to lower limb function to be identified to enable planning of well-targeted rehabilitation.
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Affiliation(s)
- Luke Funk
- a Department of Biology , LeTourneau University , Longview , TX , USA
| | - Danielle Thiessen
- a Department of Biology , LeTourneau University , Longview , TX , USA
| | - Virginia Wright
- b Bloorview Research Institute, Holland Bloorview Kids Rehabilitation Hospital , Toronto , ON , Canada.,c Department of Physical Therapy , University of Toronto , Toronto , ON , Canada
| | - Jan Andrysek
- b Bloorview Research Institute, Holland Bloorview Kids Rehabilitation Hospital , Toronto , ON , Canada.,d Institute of Biomaterials and Biomedical Engineering, University of Toronto , Toronto , ON , Canada
| | - Karen Rispin
- a Department of Biology , LeTourneau University , Longview , TX , USA
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Boileau I, Rusjan PM, Williams B, Mansouri E, Mizrahi R, De Luca V, Johnson DS, Wilson AA, Houle S, Kish SJ, Tong J. Blocking of fatty acid amide hydrolase activity with PF-04457845 in human brain: a positron emission tomography study with the novel radioligand [(11)C]CURB. J Cereb Blood Flow Metab 2015; 35:1827-35. [PMID: 26082009 PMCID: PMC4635238 DOI: 10.1038/jcbfm.2015.133] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Revised: 04/20/2015] [Accepted: 05/15/2015] [Indexed: 02/03/2023]
Abstract
Positron emission tomography with [(11)C]CURB was recently developed to quantify fatty acid amide hydrolase (FAAH), the enzyme responsible for hydrolyzing the endocannabinoid anandamide. This study investigated the test-retest reliability of [(11)C]CURB as well as its in vivo specificity and the validity of the kinetic model by using the highly specific FAAH inhibitor, PF-04457845. Five healthy volunteers completed test-retest [(11)C]CURB scans 1 to 2 months apart and six subjects completed baseline and blocking scans on the same day after PF-04457845 (p.o.) administration (1, 4, or 20 mg; n=2 each). The composite parameter λk3 (an index of FAAH activity, λ=K1/k2) was estimated using an irreversible two-tissue compartment model with plasma input function. There were no clinically observable responses to oral PF-04457845 or [(11)C]CURB injection. Oral administration of PF-04457845 reduced [(11)C]CURB binding to a homogeneous level at all three doses, with λk3 values decreased by ⩾91%. Excellent reproducibility and good reliability (test-retest variability=9%; intraclass correlation coefficient=0.79) were observed across all regions of interest investigated. Our findings suggest that λk3/[(11)C]CURB is a reliable, highly sensitive, and selective tool to measure FAAH activity in human brain in vivo. Moreover, PF-04457845 is a highly potent FAAH inhibitor (>95% inhibition at 1 mg) in living human brain.
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Affiliation(s)
- Isabelle Boileau
- Addiction Imaging Research Group, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.,Human Brain Lab, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.,Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.,Research Imaging Centre, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.,Department of Pharmacology, University of Toronto, Toronto, Ontario, Canada.,Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada.,Institute of Medical Sciences, University of Toronto, Toronto, Ontario, Canada
| | - Pablo M Rusjan
- Research Imaging Centre, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.,Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada
| | - Belinda Williams
- Addiction Imaging Research Group, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.,Human Brain Lab, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.,Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.,Research Imaging Centre, Centre for Addiction and Mental Health, Toronto, Ontario, Canada
| | - Esmaeil Mansouri
- Addiction Imaging Research Group, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.,Human Brain Lab, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.,Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.,Research Imaging Centre, Centre for Addiction and Mental Health, Toronto, Ontario, Canada
| | - Romina Mizrahi
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.,Research Imaging Centre, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.,Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada.,Institute of Medical Sciences, University of Toronto, Toronto, Ontario, Canada
| | - Vincenzo De Luca
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.,Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada.,Institute of Medical Sciences, University of Toronto, Toronto, Ontario, Canada
| | - Douglas S Johnson
- Pfizer Worldwide Research and Development, Cambridge, Massachusetts, USA
| | - Alan A Wilson
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.,Research Imaging Centre, Centre for Addiction and Mental Health, Toronto, Ontario, Canada
| | - Sylvain Houle
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.,Research Imaging Centre, Centre for Addiction and Mental Health, Toronto, Ontario, Canada
| | - Stephen J Kish
- Human Brain Lab, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.,Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.,Research Imaging Centre, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.,Department of Pharmacology, University of Toronto, Toronto, Ontario, Canada.,Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada.,Institute of Medical Sciences, University of Toronto, Toronto, Ontario, Canada
| | - Junchao Tong
- Human Brain Lab, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.,Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.,Research Imaging Centre, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.,Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada
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Froklage FE, Boellaard R, Bakker E, Hendrikse NH, Reijneveld JC, Schuit RC, Windhorst AD, Schober P, van Berckel BNM, Lammertsma AA, Postnov A. Quantification of 11C-Laniquidar Kinetics in the Brain. J Nucl Med 2015; 56:1730-5. [PMID: 26294297 DOI: 10.2967/jnumed.115.157586] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Accepted: 08/03/2015] [Indexed: 11/16/2022] Open
Abstract
UNLABELLED Overexpression of the multidrug efflux transport P-glycoprotein may play an important role in pharmacoresistance. (11)C-laniquidar is a newly developed tracer of P-glycoprotein expression. The aim of this study was to develop a pharmacokinetic model for quantification of (11)C-laniquidar uptake and to assess its test-retest variability. METHODS Two (test-retest) dynamic (11)C-laniquidar PET scans were obtained in 8 healthy subjects. Plasma input functions were obtained using online arterial blood sampling with metabolite corrections derived from manual samples. Coregistered T1 MR images were used for region-of-interest definition. Time-activity curves were analyzed using various plasma input compartmental models. RESULTS (11)C-laniquidar was metabolized rapidly, with a parent plasma fraction of 50% at 10 min after tracer injection. In addition, the first-pass extraction of (11)C-laniquidar was low. (11)C-laniquidar time-activity curves were best fitted to an irreversible single-tissue compartment (1T1K) model using conventional models. Nevertheless, significantly better fits were obtained using 2 parallel single-tissue compartments, one for parent tracer and the other for labeled metabolites (dual-input model). Robust K1 results were also obtained by fitting the first 5 min of PET data to the 1T1K model, at least when 60-min plasma input data were used. For both models, the test-retest variability of (11)C-laniquidar rate constant for transfer from arterial plasma to tissue (K1) was approximately 19%. CONCLUSION The accurate quantification of (11)C-laniquidar kinetics in the brain is hampered by its fast metabolism and the likelihood that labeled metabolites enter the brain. Best fits for the entire 60 min of data were obtained using a dual-input model, accounting for uptake of (11)C-laniquidar and its labeled metabolites. Alternatively, K1 could be obtained from a 5-min scan using a standard 1T1K model. In both cases, the test-retest variability of K1 was approximately 19%.
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Affiliation(s)
- Femke E Froklage
- Department of Neurology, Stichting Epilepsie Instellingen Nederland (SEIN), Heemstede, The Netherlands Department of Neurology, VU University Medical Center, Amsterdam, The Netherlands
| | - Ronald Boellaard
- Department of Radiology and Nuclear Medicine, VU University Medical Center, Amsterdam, The Netherlands
| | - Esther Bakker
- Department of Radiology and Nuclear Medicine, VU University Medical Center, Amsterdam, The Netherlands
| | - N Harry Hendrikse
- Department of Radiology and Nuclear Medicine, VU University Medical Center, Amsterdam, The Netherlands Department of Clinical Pharmacology and Pharmacy, VU University Medical Center, Amsterdam, The Netherlands; and
| | - Jaap C Reijneveld
- Department of Neurology, VU University Medical Center, Amsterdam, The Netherlands
| | - Robert C Schuit
- Department of Radiology and Nuclear Medicine, VU University Medical Center, Amsterdam, The Netherlands
| | - Albert D Windhorst
- Department of Radiology and Nuclear Medicine, VU University Medical Center, Amsterdam, The Netherlands
| | - Patrick Schober
- Department of Anesthesiology, VU University Medical Center, Amsterdam, The Netherlands
| | - Bart N M van Berckel
- Department of Radiology and Nuclear Medicine, VU University Medical Center, Amsterdam, The Netherlands
| | - Adriaan A Lammertsma
- Department of Radiology and Nuclear Medicine, VU University Medical Center, Amsterdam, The Netherlands
| | - Andrey Postnov
- Department of Radiology and Nuclear Medicine, VU University Medical Center, Amsterdam, The Netherlands
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Studenic P, Stamm T, Smolen JS, Aletaha D. Reliability of patient-reported outcomes in rheumatoid arthritis patients: an observational prospective study. Rheumatology (Oxford) 2015; 55:41-8. [PMID: 26261357 DOI: 10.1093/rheumatology/kev282] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVE Patient-reported outcomes (PROs) such as pain, patient global assessment (PGA) and fatigue are regularly assessed in RA patients. In the present study, we aimed to explore the reliability and smallest detectable differences (SDDs) of these PROs, and whether the time between assessments has an impact on reliability. METHODS Forty RA patients on stable treatment reported the three PROs daily over two subsequent months. We assessed the reliability of these measures by calculating intraclass correlation coefficients (ICCs) and the SDDs for 1-, 7-, 14- and 28-day test-retest intervals. RESULTS Overall, SDD and ICC were 25 mm and 0.67 for pain, 25 mm and 0.71 for PGA and 30 mm and 0.66 for fatigue, respectively. SDD was higher with longer time period between assessments, ranging from 19 mm (1-day intervals) to 30 mm (28-day intervals) for pain, 19 to 33 mm for PGA, and 26 to 34 mm for fatigue; correspondingly, ICC was smaller with longer intervals, and ranged between the 1- and the 28-day interval from 0.80 to 0.50 for pain, 0.83 to 0.57 for PGA and 0.76 to 0.58 for fatigue. The baseline simplified disease activity index did not have any influence on reliability. Lower baseline PRO scores led to smaller SDDs. CONCLUSION Reliability of pain, PGA and fatigue measurements is dependent on the tested time interval and the baseline levels. The relatively high SDDs, even for patients in the lowest tertiles of their PROs, indicate potential issues for assessment of the presence of remission.
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Affiliation(s)
- Paul Studenic
- Division of Rheumatology, Department of Internal Medicine 3, Medical University Vienna and
| | - Tanja Stamm
- Division of Rheumatology, Department of Internal Medicine 3, Medical University Vienna and
| | - Josef S Smolen
- Division of Rheumatology, Department of Internal Medicine 3, Medical University Vienna and 2nd Department of Medicine, Hietzing Hospital, Vienna, Austria
| | - Daniel Aletaha
- Division of Rheumatology, Department of Internal Medicine 3, Medical University Vienna and
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Normandin MD, Zheng MQ, Lin KS, Mason NS, Lin SF, Ropchan J, Labaree D, Henry S, Williams WA, Carson RE, Neumeister A, Huang Y. Imaging the cannabinoid CB1 receptor in humans with [11C]OMAR: assessment of kinetic analysis methods, test-retest reproducibility, and gender differences. J Cereb Blood Flow Metab 2015; 35:1313-22. [PMID: 25833345 DOI: 10.1038/jcbfm.2015.46] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Revised: 02/05/2015] [Accepted: 02/08/2015] [Indexed: 12/13/2022]
Abstract
The Radiotracer [(11)C]OMAR was developed for positron emission tomography (PET) imaging of cannabinoid type-1 receptors (CB1R). The objectives of the present study were to evaluate kinetic analysis methods, determine test-retest reliability, and assess gender differences in receptor availability. Dynamic PET data were acquired in 10 human subjects, and analyzed with one-tissue (1T) and two-tissue (2T) compartment models and by the Logan and multilinear analysis (MA1) methods to estimate regional volume of distribution (VT). The 2T model inclusive of a vascular component (2TV) and MA1 were the preferred techniques. Test-retest reliability of VT was good (mean absolute deviation ~9%; intraclass correlation coefficient ~0.7). Tracer parent fraction in plasma was lower in women (P<0.0001). Cerebral uptake normalized by body weight and injected dose was higher in men by 17% (P<0.0001), but VT was significantly greater in women by 23% (P<0.0001). These findings show that [(11)C]OMAR binding can be reliably quantified by the 2T model or MA1 method and demonstrate the utility of this tracer for in vivo imaging of CB1R. In addition, results from the present study indicate that gender difference in receptor binding should be taken into consideration when [(11)C]OMAR is used to quantify CB1R availability in neuropsychiatric disorders.
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Alakurtti K, Johansson JJ, Joutsa J, Laine M, Bäckman L, Nyberg L, Rinne JO. Long-term test-retest reliability of striatal and extrastriatal dopamine D2/3 receptor binding: study with [(11)C]raclopride and high-resolution PET. J Cereb Blood Flow Metab 2015; 35:1199-205. [PMID: 25853904 PMCID: PMC4640276 DOI: 10.1038/jcbfm.2015.53] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Revised: 02/27/2015] [Accepted: 03/02/2015] [Indexed: 01/13/2023]
Abstract
We measured the long-term test-retest reliability of [(11)C]raclopride binding in striatal subregions, the thalamus and the cortex using the bolus-plus-infusion method and a high-resolution positron emission scanner. Seven healthy male volunteers underwent two positron emission tomography (PET) [(11)C]raclopride assessments, with a 5-week retest interval. D2/3 receptor availability was quantified as binding potential using the simplified reference tissue model. Absolute variability (VAR) and intraclass correlation coefficient (ICC) values indicated very good reproducibility for the striatum and were 4.5%/0.82, 3.9%/0.83, and 3.9%/0.82, for the caudate nucleus, putamen, and ventral striatum, respectively. Thalamic reliability was also very good, with VAR of 3.7% and ICC of 0.92. Test-retest data for cortical areas showed good to moderate reproducibility (6.1% to 13.1%). Our results are in line with previous test-retest studies of [(11)C]raclopride binding in the striatum. A novel finding is the relatively low variability of [(11)C]raclopride binding, providing suggestive evidence that extrastriatal D2/3 binding can be studied in vivo with [(11)C]raclopride PET to be verified in future studies.
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Affiliation(s)
- Kati Alakurtti
- Turku PET Centre, University of Turku and Turku University Hospital, Turku, Finland
| | - Jarkko J Johansson
- Turku PET Centre, University of Turku and Turku University Hospital, Turku, Finland
| | - Juho Joutsa
- Turku PET Centre, University of Turku and Turku University Hospital, Turku, Finland
| | - Matti Laine
- Department of Psychology and Logopedics, Abo Akademi University, Turku, Finland
| | - Lars Bäckman
- Aging Research Center, Karolinska Institute, Stockholm, Sweden
| | - Lars Nyberg
- Department of Radiation Sciences, Umeå University, Umeå, Sweden
| | - Juha O Rinne
- 1] Turku PET Centre, University of Turku and Turku University Hospital, Turku, Finland [2] Department of Neurology, Turku University Hospital, Turku, Finland
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Nessen T, Demmelmaier I, Nordgren B, Opava CH. The Swedish Exercise Self-Efficacy Scale (ESES-S): reliability and validity in a rheumatoid arthritis population. Disabil Rehabil 2015; 37:2130-4. [PMID: 25572319 PMCID: PMC4720053 DOI: 10.3109/09638288.2014.998780] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Purpose: The aim of the present study was to investigate aspects of reliability and validity of the Exercise Self-Efficacy Scale (ESES-S) in a rheumatoid arthritis (RA) population. Methods: A total of 244 people with RA participating in a physical activity stkudy were included. The six-item ESES-S, exploring confidence in performing exercise, was assessed for test–retest reliability over 4–6 months, and for internal consistency. Construct validity investigated correlation with similar and other constructs. Results: An intraclass correlation coefficient (ICC) of 0.59 (95% CI 0.37–0.73) was found for 84 participants with stable health perceptions between measurement occasions. Cronbach’s alpha coefficients of 0.87 and 0.89 were found at the first and second measurements. Corrected item-total correlation single ESES-S items ranged between 0.53 and 0.73. Construct convergent validity for the ESES-S was partly confirmed by correlations with health-enhancing physical activity and outcome expectations respectively (Pearson’s r = 0.18, p < 0.01). Construct divergent validity was confirmed by the absence of correlations with age or gender. No floor or ceiling effects were found for ESES-S. Conclusions: The results indicate that the ESES-S has moderate test–retest reliability and respectable internal consistency in people with RA. Construct validity was partially supported in the present sample. Further research on construct validity of the ESES-S is recommended.Implications for Rehabilitation Physical exercise is crucial for management of symptoms and co-morbidity in rheumatoid arthritis. Self-efficacy for exercise is important to address in rehabilitation as it regulates exercise motivation and behavior. Measurement properties of self-efficacy scales need to be assessed in specific populations and different languages.
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Affiliation(s)
- Thomas Nessen
- a Division of Physiotherapy, Department of Neurobiology , Care Sciences and Society, Karolinska Institutet , Stockholm , Sweden and
| | - Ingrid Demmelmaier
- a Division of Physiotherapy, Department of Neurobiology , Care Sciences and Society, Karolinska Institutet , Stockholm , Sweden and
| | - Birgitta Nordgren
- a Division of Physiotherapy, Department of Neurobiology , Care Sciences and Society, Karolinska Institutet , Stockholm , Sweden and
| | - Christina H Opava
- a Division of Physiotherapy, Department of Neurobiology , Care Sciences and Society, Karolinska Institutet , Stockholm , Sweden and.,b Department of Rheumatology , Karolinska University Hospital , Stockholm , Sweden
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Adams V, Mathisen B, Baines S, Lazarus C, Callister R. Reliability of measurements of tongue and hand strength and endurance using the Iowa Oral Performance Instrument with elderly adults. Disabil Rehabil 2014; 37:389-95. [PMID: 24854105 DOI: 10.3109/09638288.2014.921245] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
PURPOSE This study investigated the reliability of tongue and hand strength and endurance measurements in old adults using the Iowa Oral Performance Instrument (IOPI). METHOD Thirty aged-care residents (6 males and 24 females) aged 79-97 years were tested on four occasions two weeks apart to determine test-retest reliability. The primary outcome measures were isometric anterior and posterior tongue and hand strength (best of three trials) and isometric tongue and hand endurance time at 50% of maximal strength. RESULTS Changes in the mean between sessions for tongue and hand strength indicated acceptable (< 10%) reliability particularly with familiarisation. The within-subject variation (mean-typical error expressed as a coefficient of variation, CV) indicated higher than acceptable variation for anterior and posterior tongue and hand strength. Intra-class correlations (ICC) indicated moderate to strong reliability for anterior (ICC 0.58-0.77) and posterior (ICC 0.77-0.84) tongue strength and hand strength (ICC 0.79-0.96). No tongue or hand endurance measures were regarded as reliable. CONCLUSION These findings indicate that overall tongue and hand strength values demonstrate acceptable reliability in the elderly, especially where familiarisation with the IOPI is provided. Further investigation to reduce sources of variability in tongue endurance measurements is warranted.
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Affiliation(s)
- Valerie Adams
- Faculty of Health and Medicine, Priority Research Centre in Physical Activity and Nutrition, and School of Biomedical Sciences and Pharmacy, The University of Newcastle , Callaghan, NSW , Australia
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