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Milev E, Selby V, Wolfe A, Rohwer A, Tillmann R, Ramsey D, Iodice M, Hogrel JY, Baranello G, Scoto M, Muntoni F. Assessment of the upper limb function, strength, and mobility in treatment-naive children with spinal muscular atrophy Types 2 and 3. Muscle Nerve 2024; 69:340-348. [PMID: 38238963 DOI: 10.1002/mus.28041] [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: 02/01/2023] [Revised: 01/03/2024] [Accepted: 01/05/2024] [Indexed: 02/09/2024]
Abstract
INTRODUCTION/AIMS Current upper limb assessments in pediatric spinal muscular atrophy (SMA) may not adequately capture change with disease progression. Our aim was to examine the relationship between motor function, strength, and hand/finger mobility of the upper limb in treatment-naïve children with SMA Types 2 and 3 to assess new methods to supplement current outcomes. METHODS The Revised Upper Limb Module (RULM), grip and pinch strength, and hand/finger mobility data were collected from 19 children with SMA Types 2 and 3 aged 5.2-16.9 years over a year. RESULTS A median loss between 0.5 and 2.5 points in the RULM was seen across all SMA subgroups with the biggest median loss recorded between 10 and 14 years of age. The grip strength loss was -0.06 kg (-4.69 to 3.49; IQR, 1.21); pinch improvement of 0.05 (-0.65 to 1.27; IQR, 0.48); hand/finger mobility test improvement of 4 points (-24 to 14; IQR, 6.75) for the whole cohort. Significant correlations were found between the RULM and grip strength (p < .001), RULM and pinch strength (p < .001), RULM and revised Brooke (p < .001), grip strength and pinch strength (p < .001). DISCUSSION The combined use of the RULM, dynamometry, and hand mobility provide insight about correlations between function and strength in children with SMA. The RULM and grip strength assessments captured a significant decline in upper limb function, whereas the pinch and finger/hand mobility showed an improvement over the course of 1 year and these results should be considered for future studies.
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Affiliation(s)
- Evelin Milev
- Department of Developmental Neuroscience, Dubowitz Neuromuscular Centre, UCL Great Ormond Street Institute of Child Health, London, UK
- Department of Neurology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | - Victoria Selby
- Department of Developmental Neuroscience, Dubowitz Neuromuscular Centre, UCL Great Ormond Street Institute of Child Health, London, UK
- Department of Neurology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | - Amy Wolfe
- Department of Developmental Neuroscience, Dubowitz Neuromuscular Centre, UCL Great Ormond Street Institute of Child Health, London, UK
- Department of Neurology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | - Annemarie Rohwer
- Department of Developmental Neuroscience, Dubowitz Neuromuscular Centre, UCL Great Ormond Street Institute of Child Health, London, UK
- Department of Neurology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | | | - Danielle Ramsey
- School of Health and Sports Sciences, University of Suffolk, Ipswich, UK
| | - Mario Iodice
- Department of Neurology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | - Jean-Yves Hogrel
- Neuromuscular Physiology and Evaluation Laboratory, Neuromuscular Investigation Centre, Institute of Myology, Paris, France
| | - Giovanni Baranello
- Department of Developmental Neuroscience, Dubowitz Neuromuscular Centre, UCL Great Ormond Street Institute of Child Health, London, UK
- Department of Neurology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | - Mariacristina Scoto
- Department of Developmental Neuroscience, Dubowitz Neuromuscular Centre, UCL Great Ormond Street Institute of Child Health, London, UK
- Department of Neurology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | - Francesco Muntoni
- Department of Developmental Neuroscience, Dubowitz Neuromuscular Centre, UCL Great Ormond Street Institute of Child Health, London, UK
- Department of Neurology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
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Ayyar Gupta V, Pitchforth JM, Domingos J, Ridout D, Iodice M, Rye C, Chesshyre M, Wolfe A, Selby V, Mayhew A, Mazzone ES, Ricotti V, Hogrel JY, Niks EH, de Groot I, Servais L, Straub V, Mercuri E, Manzur AY, Muntoni F. Determining minimal clinically important differences in the North Star Ambulatory Assessment (NSAA) for patients with Duchenne muscular dystrophy. PLoS One 2023; 18:e0283669. [PMID: 37099511 PMCID: PMC10132589 DOI: 10.1371/journal.pone.0283669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 03/14/2023] [Indexed: 04/27/2023] Open
Abstract
The North Star ambulatory assessment (NSAA) is a functional motor outcome measure in Duchenne muscular dystrophy (DMD), widely used in clinical trials and natural history studies, as well as in clinical practice. However, little has been reported on the minimal clinically important difference (MCID) of the NSAA. The lack of established MCID estimates for NSAA presents challenges in interpreting the significance of the results of this outcome measure in clinical trials, natural history studies and clinical practice. Combining statistical approaches and patient perspectives, this study estimated MCID for NSAA using distribution-based estimates of 1/3 standard deviation (SD) and standard error of measurement (SEM), an anchor-based approach, with six-minute walk distance (6MWD) as the anchor, and evaluation of patient and parent perception using participant-tailored questionnaires. The MCID for NSAA in boys with DMD aged 7 to 10 years based on 1/3 SD ranged from 2.3-2.9 points, and that on SEM ranged from 2.9-3.5 points. Anchored on the 6MWD, the MCID for NSAA was estimated as 3.5 points. When the impact on functional abilities was considered using participant response questionnaires, patients and parent perceived a complete loss of function in a single item or deterioration of function in one to two items of the assessment as an important change. Our study examines MCID estimates for total NSAA scores using multiple approaches, including the impact of patient and parent perspective on within scale changes in items based on complete loss of function and deterioration of function, and provides new insight on evaluation of differences in these widely used outcome measure in DMD.
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Affiliation(s)
- Vandana Ayyar Gupta
- UCL Great Ormond Street Institute of Child Health, Dubowitz Neuromuscular Centre, Great Ormond Street Hospital for Children, London, United Kingdom
| | - Jacqueline M Pitchforth
- UCL Great Ormond Street Institute of Child Health, Dubowitz Neuromuscular Centre, Great Ormond Street Hospital for Children, London, United Kingdom
| | - Joana Domingos
- UCL Great Ormond Street Institute of Child Health, Dubowitz Neuromuscular Centre, Great Ormond Street Hospital for Children, London, United Kingdom
| | - Deborah Ridout
- Population, Policy & Practice Research and Teaching Department, UCL Great Ormond Street (GOS) Institute of Child Health, London, United Kingdom
- NIHR Great Ormond Street Hospital Biomedical Research Centre, London, United Kingdom
| | - Mario Iodice
- UCL Great Ormond Street Institute of Child Health, Dubowitz Neuromuscular Centre, Great Ormond Street Hospital for Children, London, United Kingdom
| | - Catherine Rye
- UCL Great Ormond Street Institute of Child Health, Dubowitz Neuromuscular Centre, Great Ormond Street Hospital for Children, London, United Kingdom
| | - Mary Chesshyre
- UCL Great Ormond Street Institute of Child Health, Dubowitz Neuromuscular Centre, Great Ormond Street Hospital for Children, London, United Kingdom
| | - Amy Wolfe
- UCL Great Ormond Street Institute of Child Health, Dubowitz Neuromuscular Centre, Great Ormond Street Hospital for Children, London, United Kingdom
| | - Victoria Selby
- UCL Great Ormond Street Institute of Child Health, Dubowitz Neuromuscular Centre, Great Ormond Street Hospital for Children, London, United Kingdom
| | - Anna Mayhew
- The John Walton Muscular Dystrophy Research Centre, Translational and Clinical Research Institute, Newcastle University and Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne, United Kingdom
| | - Elena S Mazzone
- Child Neurology Unite Centro Nemo, IRCCS Fondazione Policlinico Gemelli, Universita Cattolica del Sacro Cuore, Rome, Italy
| | - Valeria Ricotti
- UCL Great Ormond Street Institute of Child Health, Dubowitz Neuromuscular Centre, Great Ormond Street Hospital for Children, London, United Kingdom
- NIHR Great Ormond Street Hospital Biomedical Research Centre, London, United Kingdom
| | | | - Erik H Niks
- Department of Neurology, Leiden University Medical Center, Leiden, The Netherlands
- European Reference Network for Rare Neuromuscular Diseases - ERN EURO NMD
| | - Imelda de Groot
- Department of Rehabilitation, Donders Center for Medical Neuroscience, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Laurent Servais
- Institute of Myology, Paris, France
- Division of Child Neurology, Reference Center for Neuromuscular Disease, Centre Hospitalier Régional de Références des Maladies Neuromusculaires, Department of Paediatrics, University Hospital Liège & University of La Citadelle, Liège, Belgium
- Department of Paediatrics, MDUK Neuromuscular Center, University of Oxford, Oxford, United Kingdom
| | - Volker Straub
- The John Walton Muscular Dystrophy Research Centre, Translational and Clinical Research Institute, Newcastle University and Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne, United Kingdom
| | - Eugenio Mercuri
- Child Neurology Unite Centro Nemo, IRCCS Fondazione Policlinico Gemelli, Universita Cattolica del Sacro Cuore, Rome, Italy
- Child Neurology Unit, Universita Cattolica del Sacro Cuore, Rome, Italy
| | - Adnan Y Manzur
- UCL Great Ormond Street Institute of Child Health, Dubowitz Neuromuscular Centre, Great Ormond Street Hospital for Children, London, United Kingdom
| | - Francesco Muntoni
- UCL Great Ormond Street Institute of Child Health, Dubowitz Neuromuscular Centre, Great Ormond Street Hospital for Children, London, United Kingdom
- NIHR Great Ormond Street Hospital Biomedical Research Centre, London, United Kingdom
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Ricotti V, Kadirvelu B, Selby V, Festenstein R, Mercuri E, Voit T, Faisal AA. Wearable full-body motion tracking of activities of daily living predicts disease trajectory in Duchenne muscular dystrophy. Nat Med 2023; 29:95-103. [PMID: 36658421 PMCID: PMC9873561 DOI: 10.1038/s41591-022-02045-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 09/14/2022] [Indexed: 01/21/2023]
Abstract
Artificial intelligence has the potential to revolutionize healthcare, yet clinical trials in neurological diseases continue to rely on subjective, semiquantitative and motivation-dependent endpoints for drug development. To overcome this limitation, we collected a digital readout of whole-body movement behavior of patients with Duchenne muscular dystrophy (DMD) (n = 21) and age-matched controls (n = 17). Movement behavior was assessed while the participant engaged in everyday activities using a 17-sensor bodysuit during three clinical visits over the course of 12 months. We first defined new movement behavioral fingerprints capable of distinguishing DMD from controls. Then, we used machine learning algorithms that combined the behavioral fingerprints to make cross-sectional and longitudinal disease course predictions, which outperformed predictions derived from currently used clinical assessments. Finally, using Bayesian optimization, we constructed a behavioral biomarker, termed the KineDMD ethomic biomarker, which is derived from daily-life behavioral data and whose value progresses with age in an S-shaped sigmoid curve form. The biomarker developed in this study, derived from digital readouts of daily-life movement behavior, can predict disease progression in patients with muscular dystrophy and can potentially track the response to therapy.
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Affiliation(s)
- Valeria Ricotti
- National Institute for Health and Care Research Great Ormond Street Hospital Biomedical Research Centre/University College London Great Ormond Street Institute of Child Health, London, UK
- Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | - Balasundaram Kadirvelu
- Brain & Behaviour Lab, Department of Bioengineering, Imperial College London, London, UK
- Brain & Behaviour Lab, Department of Computing, Imperial College London, London, UK
- Behaviour Analytics Lab, Data Science Institute, Imperial College London, London, UK
| | - Victoria Selby
- National Institute for Health and Care Research Great Ormond Street Hospital Biomedical Research Centre/University College London Great Ormond Street Institute of Child Health, London, UK
- Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | - Richard Festenstein
- Gene Control Mechanisms & Disease Group Department of Brain Sciences, Imperial College London, London, UK
- Institute of Neurology, University College London, National Hospital for Neurology and Neurosurgery (University College London Hospitals), London, UK
- Medical Research Council London Institute of Medical Sciences, London, UK
| | - Eugenio Mercuri
- Università Cattolica del Sacro Cuore, Rome, Italy
- Policlinico Universitario Agostino Gemelli University Hospital, Rome, Italy
| | - Thomas Voit
- National Institute for Health and Care Research Great Ormond Street Hospital Biomedical Research Centre/University College London Great Ormond Street Institute of Child Health, London, UK
- Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | - A Aldo Faisal
- Brain & Behaviour Lab, Department of Bioengineering, Imperial College London, London, UK.
- Brain & Behaviour Lab, Department of Computing, Imperial College London, London, UK.
- Behaviour Analytics Lab, Data Science Institute, Imperial College London, London, UK.
- Medical Research Council London Institute of Medical Sciences, London, UK.
- Chair in Digital Health, Faculty of Life Sciences, University of Bayreuth, Bayreuth, Germany.
- Brain & Behaviour Lab, Institute of Artificial & Human Intelligence, University of Bayreuth, Bayreuth, Germany.
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Wadsworth S, Abbott L, Selby V, Scoto M, Main M, Manzur A. Case study evaluating the effectiveness of intensive rehabilitation to improve function in a child with spinal muscular atrophy type 3. Physiotherapy 2022. [DOI: 10.1016/j.physio.2021.12.142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Wenzel K, Selby V, Wildberger J, Lavorato L, Thomas J, Fishman M. Choice of extended release medication for OUD in young adults (buprenorphine or naltrexone): A pilot enhancement of the Youth Opioid Recovery Support (YORS) intervention. J Subst Abuse Treat 2021; 125:108306. [PMID: 34016297 DOI: 10.1016/j.jsat.2021.108306] [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: 07/30/2020] [Revised: 09/18/2020] [Accepted: 01/19/2021] [Indexed: 11/29/2022]
Abstract
BACKGROUND The Youth Opioid Recovery Support (YORS) intervention is a promising approach for the treatment of opioid use disorder (OUD) in young adults that seeks to improve adherence to extended-release medications for OUD (XR-MOUD) and reduce opioid relapse through assertive outreach techniques. YORS was previously tested with individuals seeking extended-release naltrexone (XR-NTX), but has not been tested on individuals pursuing extended-release buprenorphine (XR-BUP). METHODS This pilot study tested the YORS intervention among a group choosing either XR-MOUD compared to historical treatment as usual (H-TAU) and intervention conditions from a previous study. This study also tested feasibility of a stepped care approach using a protocol for transition to standard care. Twenty-two young adults (ages 18-26) with OUD intending to pursue outpatient treatment with XR-NTX (n = 11) or XR-BUP (n = 11) were recruited from inpatient treatment and received 12-24 weeks of the YORS intervention. RESULTS Participants in YORS compared to H-TAU received more outpatient doses at 12 weeks (1.91 vs. 0.40, p < .001) and 24 weeks (3.76 vs. 0.70, p < .001), had lower relapse rates at 12 weeks (36.4% vs.75.0%; p = .012) and 24 weeks(52.9% vs. 95.0%; p = .003), and had greater cumulative relapse-free survival over 24 weeks (HR = 2.65, 95% CI: 1.17-6.02, p < .05). Rates of continuing MOUD in a standard care setting after the intervention ended were extremely poor. Outcomes did not differ by medication choice. CONCLUSIONS These results are consistent with previous findings and demonstrate feasibility and efficacy of YORS with patient choice of medication. The results highlight the need for innovative strategies to sustain positive outcomes and step-down care successfully in these vulnerable young adults.
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Affiliation(s)
- Kevin Wenzel
- Mountain Manor Treatment Center, 3800 Frederick Avenue, Baltimore 21229, MD, USA.
| | - Victoria Selby
- Mountain Manor Treatment Center, 3800 Frederick Avenue, Baltimore 21229, MD, USA; University of Maryland School of Nursing, Baltimore, MD, USA
| | - Jared Wildberger
- Mountain Manor Treatment Center, 3800 Frederick Avenue, Baltimore 21229, MD, USA
| | - Luciana Lavorato
- Mountain Manor Treatment Center, 3800 Frederick Avenue, Baltimore 21229, MD, USA
| | - Julia Thomas
- Mountain Manor Treatment Center, 3800 Frederick Avenue, Baltimore 21229, MD, USA
| | - Marc Fishman
- Mountain Manor Treatment Center, 3800 Frederick Avenue, Baltimore 21229, MD, USA; Johns Hopkins University School of Medicine, Department of Psychiatry and Behavioral Sciences, Baltimore, MD, USA
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Catapano F, Scaglioni D, Maresh K, Ala P, Domingos J, Selby V, Ricotti V, Phillips L, Servais L, Seferian A, Groot ID, Krom YD, Voit T, Verschuuren JJGM, Niks EH, Straub V, Morgan J, Muntoni F. Novel free-circulating and extracellular vesicle-derived miRNAs dysregulated in Duchenne muscular dystrophy. Epigenomics 2020; 12:1899-1915. [PMID: 33215544 DOI: 10.2217/epi-2020-0052] [Citation(s) in RCA: 4] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Aim: To perform cross-sectional and longitudinal miRNA profiling in plasma from Duchenne muscular dystrophy (DMD) subjects and find non-invasive biomarkers in DMD. Subjects/materials & methods: Plasma was collected from 14 age and sex matched controls and 46 DMD subjects. Free-circulating and extracellular vesicle (EV)-derived miRNA expression was measured by RT-qPCR. Results: Free-circulating and EVs derived miR-29c-3p and miR-133a-3p are dysregulated in DMD subjects. Free-circulating and EV-derived miR-29c-3p are reduced in DMD subjects undergoing daily corticosteroid treatment. Free-circulating miR-1-3p and miR-122-5p are longitudinally upregulated in ambulant DMD subjects. Conclusion: We detected novel free-circulating and EV-derived dysregulated miRNAs in plasma from DMD subjects and characterized the longitudinal profile of free-circulating miRNA on plasma from DMD subjects.
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Affiliation(s)
- Francesco Catapano
- The Dubowitz Neuromuscular Centre, UCL Great Ormond Street Institute of Child Health, 30 Guildford Street, London, WC1N 1EH, United Kingdom
| | - Dominic Scaglioni
- The Dubowitz Neuromuscular Centre, UCL Great Ormond Street Institute of Child Health, 30 Guildford Street, London, WC1N 1EH, United Kingdom
| | - Kate Maresh
- The Dubowitz Neuromuscular Centre, UCL Great Ormond Street Institute of Child Health, 30 Guildford Street, London, WC1N 1EH, United Kingdom
| | - Pierpaolo Ala
- The Dubowitz Neuromuscular Centre, UCL Great Ormond Street Institute of Child Health, 30 Guildford Street, London, WC1N 1EH, United Kingdom
| | - Joana Domingos
- The Dubowitz Neuromuscular Centre, UCL Great Ormond Street Institute of Child Health, 30 Guildford Street, London, WC1N 1EH, United Kingdom
| | - Victoria Selby
- The Dubowitz Neuromuscular Centre, UCL Great Ormond Street Institute of Child Health, 30 Guildford Street, London, WC1N 1EH, United Kingdom
| | - Valeria Ricotti
- National Institute for Health Research, Great Ormond Street Institute of Child Health Biomedical Research Centre, University College London, London WC1N 1EH, United Kingdom
| | - Lauren Phillips
- John Walton Muscular Dystrophy Research Centre, MRC Centre for Neuromuscular Diseases, Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Laurent Servais
- Institute I-Motion, Hôpital Armand Trousseau, Paris, France.,Centre de Référence des maladies Neuromusculaires, CHU de Liège, Liège, Belgium
| | | | - Imelda de Groot
- Department of Rehabilitation, Amalia Children's Hospital, Radboud university medical centre, Nijmegen, Netherlands
| | - Yvonne D Krom
- Department of Neurology, Leiden University Medical Center, RC Leiden, Netherlands.,Duchenne Center Netherlands
| | - Thomas Voit
- National Institute for Health Research, Great Ormond Street Institute of Child Health Biomedical Research Centre, University College London, London WC1N 1EH, United Kingdom
| | - J J G M Verschuuren
- Department of Neurology, Leiden University Medical Center, RC Leiden, Netherlands.,Duchenne Center Netherlands
| | - E H Niks
- Department of Neurology, Leiden University Medical Center, RC Leiden, Netherlands.,Duchenne Center Netherlands
| | - Volker Straub
- Northern Genetics Service, Newcastle upon Tyne Hospitals NHS Foundation Trust, Institute of Human Genetics, International Centre for Life, Central Parkway, Newcastle upon Tyne, United Kingdom
| | - Jennifer Morgan
- The Dubowitz Neuromuscular Centre, UCL Great Ormond Street Institute of Child Health, 30 Guildford Street, London, WC1N 1EH, United Kingdom.,National Institute for Health Research, Great Ormond Street Institute of Child Health Biomedical Research Centre, University College London, London WC1N 1EH, United Kingdom
| | - Francesco Muntoni
- The Dubowitz Neuromuscular Centre, UCL Great Ormond Street Institute of Child Health, 30 Guildford Street, London, WC1N 1EH, United Kingdom.,National Institute for Health Research, Great Ormond Street Institute of Child Health Biomedical Research Centre, University College London, London WC1N 1EH, United Kingdom
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Selby V, Ramdharry G, Muntoni F. OUTCOME MEASURES. Neuromuscul Disord 2020. [DOI: 10.1016/j.nmd.2020.08.242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Mayhew AG, Coratti G, Mazzone ES, Klingels K, James M, Pane M, Straub V, Goemans N, Mercuri E, Muntoni F, Ridout D, Selby V. Performance of Upper Limb module for Duchenne muscular dystrophy. Dev Med Child Neurol 2020; 62:633-639. [PMID: 31538331 DOI: 10.1111/dmcn.14361] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/26/2019] [Indexed: 11/28/2022]
Abstract
AIM To report the differences between Performance of Upper Limb (PUL) versions 1.2 and 2.0, compare the measurement ability of the two versions, and compare their longitudinal performance in Duchenne muscular dystrophy. METHOD Rasch analysis was performed on the dual data from three centres to confirm whether the two scales measure the same construct. Change scores in natural history for the different domains were compared for the two versions. RESULTS Rasch analysis demonstrated that both versions measure the same construct and that the PUL 2.0 was a better fit to the construct of motor performance and better able to detect change at 12 months in all levels of ability than the PUL 1.2. This was also true when change scores were reviewed over 2 years. INTERPRETATION Our results confirm that the PUL 1.2 and 2.0 versions detect change in all domains over 2 years. They also demonstrate that simplifying the original scoring of the PUL 1.2 for the revised PUL 2.0 maintains the validity of the construct and enhances the scale measurement qualities. WHAT THIS PAPER ADDS The original and revised Performance of Upper Limb (PUL) scales measure the same construct. Both scales detected change in all domains over 2 years. The PUL 2.0 enhances the measurement qualities of the scale.
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Affiliation(s)
- Anna G Mayhew
- The John Walton Muscular Dystrophy Research Centre, Institute of Genetic Medicine, Newcastle University and Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | - Giorgia Coratti
- Child Neurology Unit e Centro Nemo, IRCCS Fondazione Policlinico Gemelli, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Elena Stacy Mazzone
- Child Neurology Unit e Centro Nemo, IRCCS Fondazione Policlinico Gemelli, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Katrijn Klingels
- Department of Rehabilitation Sciences, KU Leuven - University of Leuven, Heverlee, Belgium.,Faculty of Rehabilitation Sciences, REVAL, Hasselt University, Hasselt, Belgium
| | - Meredith James
- The John Walton Muscular Dystrophy Research Centre, Institute of Genetic Medicine, Newcastle University and Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | - Marika Pane
- Child Neurology Unit e Centro Nemo, IRCCS Fondazione Policlinico Gemelli, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Volker Straub
- The John Walton Muscular Dystrophy Research Centre, Institute of Genetic Medicine, Newcastle University and Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | - Natalie Goemans
- Child Neurology, University Hospitals Leuven, Leuven, Belgium
| | - Eugenio Mercuri
- Child Neurology Unit e Centro Nemo, IRCCS Fondazione Policlinico Gemelli, Università Cattolica del Sacro Cuore, Rome, Italy
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Pula S, Urankar K, Norman A, Pierre G, Langton-Hewer S, Selby V, Mason F, Vijayakumar K, McFarland R, Taylor RW, Majumdar A. A novel de novo ACTA1 variant in a patient with nemaline myopathy and mitochondrial Complex I deficiency. Neuromuscul Disord 2020; 30:159-164. [PMID: 32005493 DOI: 10.1016/j.nmd.2019.11.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 11/23/2019] [Accepted: 11/28/2019] [Indexed: 12/30/2022]
Abstract
We describe the presentation and follow-up of a three-year-old girl with nemaline myopathy due to a de-novo variant in ACTA1 (encoding skeletal alpha actin) and moderately low enzyme level of Complex I of the mitochondrial respiratory chain. She presented in the neonatal period with hypotonia, followed by weakness in the facial, bulbar, respiratory and neck flexors muscles. A biopsy of her quadriceps muscle at the age of one year showed nemaline rods. Based on her clinical presentation of a congenital myopathy and histopathological features on a muscle biopsy, ACTA1 was sequenced, and this revealed a novel sequence variant, c.760 A>C p. (Asn254His). In addition, mitochondrial respiratory chain enzymatic activity of skeletal muscle biopsy showed a moderately low activity of complex I (nicotinamide adenine dinucleotide (NADH): ubiquinone oxidoreductase). Disturbances of Complex I of the respiratory chain have been reported in patients with nemaline myopathy, although the mechanism remains unclear.
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Affiliation(s)
- Shpresa Pula
- Department of Paediatric Neurology, University Hospitals Bristol NHS Foundation Trust, 6th Floor Education Centre, Upper Maudlin St, Bristol BS2 8BJ, United Kingdom
| | - Kathryn Urankar
- Department of Neuropathology, North Bristol Hospital NHS Foundation Trust, Bristol, United Kingdom
| | - Andrew Norman
- Department of Clinical Genetics, University Hospitals Bristol NHS Foundation Trust, Bristol, United Kingdom
| | - Germaine Pierre
- Department of Paediatric Neurology, University Hospitals Bristol NHS Foundation Trust, 6th Floor Education Centre, Upper Maudlin St, Bristol BS2 8BJ, United Kingdom
| | - Simon Langton-Hewer
- Department of Paediatric Respiratory Medicine, Bristol Royal Hospital for Children, University Hospitals Bristol NHS Foundation Trust, Bristol, United Kingdom
| | - Victoria Selby
- Department of Paediatric Neurology, University Hospitals Bristol NHS Foundation Trust, 6th Floor Education Centre, Upper Maudlin St, Bristol BS2 8BJ, United Kingdom
| | - Faye Mason
- Department of Paediatric Neurology, University Hospitals Bristol NHS Foundation Trust, 6th Floor Education Centre, Upper Maudlin St, Bristol BS2 8BJ, United Kingdom
| | - Kayal Vijayakumar
- Department of Paediatric Neurology, University Hospitals Bristol NHS Foundation Trust, 6th Floor Education Centre, Upper Maudlin St, Bristol BS2 8BJ, United Kingdom
| | - Robert McFarland
- Wellcome Centre for Mitochondrial Research, Institute of Neurosciences, Newcastle University, Newcastle, United Kingdom
| | - Robert W Taylor
- Wellcome Centre for Mitochondrial Research, Institute of Neurosciences, Newcastle University, Newcastle, United Kingdom
| | - Anirban Majumdar
- Department of Paediatric Neurology, University Hospitals Bristol NHS Foundation Trust, 6th Floor Education Centre, Upper Maudlin St, Bristol BS2 8BJ, United Kingdom.
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Ricotti V, Kadirvelu B, Auepanwiriyakul C, Zeng S, Selby V, Voit T, Faisal A. P.205Daily life digital biomarkers for longitudinal monitoring of Duchenne muscular dystrophy with wearable sensors. Neuromuscul Disord 2019. [DOI: 10.1016/j.nmd.2019.06.260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Ricotti V, Kadirvelu B, Rabinowicz S, Selby V, Voit T, Faisal A. P.204Full-body behaviour analytics reveals DMD disease state within the first few steps of the 6-minute-walk test. Neuromuscul Disord 2019. [DOI: 10.1016/j.nmd.2019.06.259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Ricotti V, Kadirvelu B, Selby V, Voit T, Faisal A. P.203Towards high-resolution clinical digital biomarkers for Duchenne muscular dystrophy. Neuromuscul Disord 2019. [DOI: 10.1016/j.nmd.2019.06.258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Abbott L, Selby V, Wolfe A, Main M, Manzur A, Muntoni F. P.268Does 6 minute walk test distance correlate with motor function assessment and timed tests in ambulant boys with Becker muscular dystrophy? Neuromuscul Disord 2019. [DOI: 10.1016/j.nmd.2019.06.382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Catapano F, Scaglioni D, Maresh K, Selby V, Ala P, Domingos J, Ricotti V, Phillips L, van der Holst M, Servais L, Seferian A, de Groot I, Krom Y, Voit T, Verschuuren J, Niks E, Straub V, Morgan J, Muntoni F. P.144A cross sectional and longitudinal miRNA profiling study identified a set of novel free-circulating and exosomal miRNAs dysregulated in plasma from Duchenne muscular dystrophy patients. Neuromuscul Disord 2019. [DOI: 10.1016/j.nmd.2019.06.200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Ricotti V, Selby V, Ridout D, Domingos J, Decostre V, Mayhew A, Eagle M, Butler J, Guglieri M, Van der Holst M, Jansen M, Verschuuren JJGM, de Groot IJM, Niks EH, Servais L, Straub V, Voit T, Hogrel JY, Muntoni F. Respiratory and upper limb function as outcome measures in ambulant and non-ambulant subjects with Duchenne muscular dystrophy: A prospective multicentre study. Neuromuscul Disord 2019; 29:261-268. [PMID: 30852071 DOI: 10.1016/j.nmd.2019.02.002] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [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: 12/17/2018] [Revised: 02/05/2019] [Accepted: 02/08/2019] [Indexed: 11/19/2022]
Abstract
The field of translational research in Duchenne muscular dystrophy (DMD) has been transformed in the last decade by a number of therapeutic targets, mostly studied in ambulant patients. A paucity of studies focus on measures that capture the non-ambulant stage of the disease, and the transition between the ambulant and non-ambulant phase. In this prospective natural history study, we report the results of a comprehensive assessment of respiratory, upper limb function and upper limb muscle strength in a group of 89 DMD boys followed in 3 European countries, 81 receiving corticosteroids, spanning a wide age range (5-18 years) and functional abilities, from ambulant (n = 60) to non-ambulant (n = 29). Respiratory decline could be detected in the early ambulatory phase using Peak Expiratory Flow percentage predicted (PEF%), despite glucocorticoid use (mean annual decline: 4.08, 95% CI [-7.44,-0.72], p = 0.02 in ambulant; 4.81, 95% CI [-6.79,-2.82], p < 0.001 in non-ambulant). FVC% captured disease progression in non-ambulant DMD subjects, with an annual loss of 5.47% (95% CI [-6.48,-4.45], p < 0.001). Upper limb function measured with the Performance of Upper Limb (PUL 1.2) showed an annual loss of 4.13 points (95% CI [-4.79,3.47], p < 0.001) in the non-ambulant cohort. Measures of upper limb strength (MyoGrip and MyoPinch) showed a continuous decline independent of the ambulatory status, when reported as percentage predicted (grip force -5.51%, 95% CI [-6.54,-4.48], p < 0.001 in ambulant and a slower decline -2.86%; 95% CI -3.29,-2.43, p < 0.001, in non-ambulant; pinch force: -2.66%, 95% CI [-3.82,-1.51], p < 0.001 in ambulant and -2.23%, 95% CI [-2.92,-1.53], p < 0.001 in non-ambulant). Furthermore, we also explored the novel concept of a composite endpoint by combining respiratory, upper limb function and force domains: we were able to identify clear clinical progression in patients in whom an isolated measurement of only one of these domains failed to appreciate the yearly change. Our study contributes to the field of natural history of DMD, linking the ambulant and non-ambulant phases of the disease, and suggests that composite scores should be explored further.
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Affiliation(s)
- V Ricotti
- NIHR Great Ormond Street Hospital Biomedical Research Centre, Great Ormond Street Institute of Child Health, Great Ormond Street Hospital Trust, University College London, London, UK; Solid Biosciences, London, UK.
| | - V Selby
- NIHR Great Ormond Street Hospital Biomedical Research Centre, Great Ormond Street Institute of Child Health, Great Ormond Street Hospital Trust, University College London, London, UK; Dubowitz Neuromuscular Centre, UCL Great Ormond Street Institute of Child Health, Great Ormond Street Hospital Trust, London, UK
| | - D Ridout
- NIHR Great Ormond Street Hospital Biomedical Research Centre, Great Ormond Street Institute of Child Health, Great Ormond Street Hospital Trust, University College London, London, UK; Population, Policy and Practice Program, UCL Great Ormond Street Institute of Child Health, London, UK
| | - J Domingos
- Dubowitz Neuromuscular Centre, UCL Great Ormond Street Institute of Child Health, Great Ormond Street Hospital Trust, London, UK
| | - V Decostre
- Groupe Hospitalier Pitié Salpêtrière, Institut de Myologie, Paris, France
| | - A Mayhew
- John Walton Muscular Dystrophy Research Centre, Newcastle University, Newcastle, UK
| | - M Eagle
- John Walton Muscular Dystrophy Research Centre, Newcastle University, Newcastle, UK
| | - J Butler
- Dubowitz Neuromuscular Centre, UCL Great Ormond Street Institute of Child Health, Great Ormond Street Hospital Trust, London, UK
| | - M Guglieri
- John Walton Muscular Dystrophy Research Centre, Newcastle University, Newcastle, UK
| | | | - M Jansen
- Department of Rehabilitation, Donders Centre of Neuroscience, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | | | - I J M de Groot
- Department of Rehabilitation, Donders Centre of Neuroscience, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - E H Niks
- Leiden University Medical Centre, Leiden, The Netherlands
| | - L Servais
- Groupe Hospitalier Pitié Salpêtrière, Institut de Myologie, Paris, France
| | - V Straub
- John Walton Muscular Dystrophy Research Centre, Newcastle University, Newcastle, UK
| | - T Voit
- NIHR Great Ormond Street Hospital Biomedical Research Centre, Great Ormond Street Institute of Child Health, Great Ormond Street Hospital Trust, University College London, London, UK; Dubowitz Neuromuscular Centre, UCL Great Ormond Street Institute of Child Health, Great Ormond Street Hospital Trust, London, UK
| | - J Y Hogrel
- Groupe Hospitalier Pitié Salpêtrière, Institut de Myologie, Paris, France
| | - F Muntoni
- NIHR Great Ormond Street Hospital Biomedical Research Centre, Great Ormond Street Institute of Child Health, Great Ormond Street Hospital Trust, University College London, London, UK; Dubowitz Neuromuscular Centre, UCL Great Ormond Street Institute of Child Health, Great Ormond Street Hospital Trust, London, UK.
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Ricotti V, Haar S, Selby V, Voit T, Faisal A. DUCHENNE MUSCULAR DYSTROPHY - PHYSIOTHERAPY. Neuromuscul Disord 2018. [DOI: 10.1016/j.nmd.2018.06.362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Selby V, Ramdharry G, Hanna M, Muntoni F. CONGENITAL MYASTHENIC SYNDROMES AND MYASTHENIA. Neuromuscul Disord 2018. [DOI: 10.1016/j.nmd.2018.06.103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Selby V, Ricotti V, Mayhew A, Ridout D, Pitchforth J, Niks E, Servais L, de Groot I, Straub V, Mercuri E, Muntoni F. DUCHENNE MUSCULAR DYSTROPHY - PHYSIOTHERAPY. Neuromuscul Disord 2018. [DOI: 10.1016/j.nmd.2018.06.351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Psotka M, Selby V, Janmohamed M, De Marco T, Klein L, Wieselthaler G. Minimally-invasive Implantation of a Centrifugal Continuous-flow Left Ventricular Assist Device is Associated With Decreased Early Right Ventricular Failure. J Heart Lung Transplant 2018. [DOI: 10.1016/j.healun.2018.01.233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
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Domingos J, Eagle M, Moraux A, Butler J, Decostre V, Ridout D, Mayhew A, Selby V, Guglieri M, Holst MVD, Jansen M, Verschuuren JGM, Groot ID, Niks E, Servais L, Hogrel JY, Straub V, Voit T, Ricotti V, Muntoni F. PO195 Outcome measures for duchenne muscular dystrophy: implications for trials. J Neurol Psychiatry 2017. [DOI: 10.1136/jnnp-2017-abn.216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Selby V, Ramdharry G, Hogrel J, Milev E, Hanna M, Muntoni F. Functional fatigue in a sample of the UK myasthenic population. Neuromuscul Disord 2017. [DOI: 10.1016/j.nmd.2017.06.463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Domingos J, Eagle M, Moraux A, Butler J, Decostre V, Ridout D, Mayhew A, Selby V, Guglieri M, Van der Holst M, Jansen M, Verschuuren J, de Groot I, Niks E, Servais L, Hogrel J, Straub V, Voit T, Ricotti V, Muntoni F. Outcome measures for Duchenne muscular dystrophy from ambulant to non-ambulant patients: implications for clinical trials. Neuromuscul Disord 2017. [DOI: 10.1016/j.nmd.2017.06.495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Selby V, Ramdharry G, Hanna M, Muntoni F. Development of a specific home based assessment tool for monitoring fluctuations in physical function and muscle performance in adult and paediatric myasthenia patients. Neuromuscul Disord 2017. [DOI: 10.1016/j.nmd.2017.06.462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Svetlichnaya J, Manicardi M, Selby V, Klein L, Janmohamed M, De Marco T. Doppler Echocardiography Provides a Reliable Estimate of Elevated Pulmonary Vascular Resistance in Patients with Advanced Lung and Liver Disease. J Heart Lung Transplant 2017. [DOI: 10.1016/j.healun.2017.01.442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Selby V, Ramdharry G, Hogrel J, Milev E, Hanna M, Muntoni F. Functional fatigue in a sample of the UK myasthenic population. Neuromuscul Disord 2017. [DOI: 10.1016/s0960-8966(17)30327-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Domingos J, Eagle M, Moraux A, Butler J, Decostre V, Ridout D, Mayhew A, Selby V, Guglieri M, Van der Holst M, Jansen M, Verschuuren J, de Groot I, Niks E, Servais L, Hogrel J, Straub V, Voit T, Ricotti V, Muntoni F. Outcome measures for Duchenne muscular dystrophy from ambulant to non-ambulant: Implications for clinical trials. Neuromuscul Disord 2016. [DOI: 10.1016/j.nmd.2016.06.358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Metkus T, Tampakakis E, Mullin C, Kolb T, Mathai S, Damico R, Selby V, De Marco T, Hassoun P, Brower R, Tedford R. Elevated Diastolic Pulmonary Gradient Is Common in the Acute Respiratory Distress Syndrome but Does Not Predict Mortality. J Heart Lung Transplant 2016. [DOI: 10.1016/j.healun.2016.01.409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Selby V, Ramdharry G, Balls D, James N, Hogrel J, Hanna M, Muntoni F. Fatigability during functional outcome measures in participants with myasthenic conditions. Neuromuscul Disord 2015. [DOI: 10.1016/j.nmd.2015.06.099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Svetlichnaya J, Selby V, Singer J, Klein L, Janmohamed M, Hays S, Kukreja J, De Marco T. Right Ventricular Outflow Tract Doppler Envelope Mid-Systolic Notching Predicts Pulmonary Vascular Disease in Patients With Advanced Lung Disease. J Heart Lung Transplant 2015. [DOI: 10.1016/j.healun.2015.01.974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Vaduganathan M, Tabtabai S, Steiner J, Stone J, Estep J, Witteles R, Feltrin G, Zucker M, Baran D, Seldin D, Patel J, Hanna M, Cordero-Reyes A, Selby V, Semigran M, Maurer M. Modified BMI Does Not Predict Adverse Outcomes in Patients With Cardiac Amyloid Undergoing Heart Transplantation: A Report From iCCAT (International Consortium for Cardiac Amyloid Transplantation). J Heart Lung Transplant 2015. [DOI: 10.1016/j.healun.2015.01.820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Tabtabai S, Steiner J, Vaduganathan M, Stone J, Estep J, Witteles R, Giuseppe F, Zucker M, Baran D, Seldin D, Patel J, Hanna M, Cordero-Reyes A, Selby V, Maurer M, Semigran M. The Use of Circulatory Support While Awaiting Heart Transplant in Patients With AL and TTR: Amyloidosis: A Report From iCCAT, the International Consortium for Cardiac Amyloid Transplant. J Heart Lung Transplant 2015. [DOI: 10.1016/j.healun.2015.01.254] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Abstract
Scientists have known for decades that persons who volunteer for behavioral research may be different from those who decline participation and that characteristics differentiating volunteers from non-volunteers may vary depending on the nature of the research. There is evidence that volunteer self-selection can impact representativeness of samples in studies involving physically or psychologically stressful procedures, such as electric shocks, sensory isolation, or drug effects. However, the degree to which self-selection influences sample characteristics in "stressful" studies involving positron emission tomography (PET) has not been evaluated. Since estimation of population parameters, robustness of findings, and validity of inferred relationships can all be impacted by volunteer bias, it is important to determine if self-selection may act as an unrecognized confound in such studies. In the present investigation, we obtained baseline data on 114 (56M, 58F) subjects who participated in a study involving completion of several self-report questionnaires and behavioral performance tasks. Participants were later given the opportunity to enroll in an [11C]raclopride PET study involving intravenous amphetamine (AMPH) administration. Demographic characteristics, personality traits, and task performance of subjects who consented to the latter study were compared with those who declined participation. Findings showed that the principal personality trait that distinguished the two groups was sensation-seeking; volunteers scored significantly higher on this dimension than non-volunteers. Males were more likely to volunteer than females. However, results of mediation analysis suggested that the relationship between gender and volunteer status was mediated by greater sensation-seeking traits in the males. Implications of these findings are discussed.
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Affiliation(s)
- Lynn M Oswald
- Department of Family and Community Health, University of Maryland School of Nursing, Baltimore, MD 21201, USA.
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Main M, Hiscock A, Selby V, Muntoni F. S.P.19 Using the Motor Function Measure (MFM) in the assessment of children with Charcot–Marie–Tooth (CMT)1A; strengths and limitations. Neuromuscul Disord 2012. [DOI: 10.1016/j.nmd.2012.06.294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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