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Buchholz A, Deme P, Betz JF, Brandt J, Haughey N, Cervenka MC. A randomized feasibility trial of the modified Atkins diet in older adults with mild cognitive impairment due to Alzheimer's disease. Front Endocrinol (Lausanne) 2024; 15:1182519. [PMID: 38505743 PMCID: PMC10949529 DOI: 10.3389/fendo.2024.1182519] [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] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 02/05/2024] [Indexed: 03/21/2024] Open
Abstract
Background Alzheimer's disease (AD) is increasing in prevalence, but effective treatments for its cognitive impairment remain severely limited. This study investigates the impact of ketone body production through dietary manipulation on memory in persons with mild cognitive impairment due to early AD and explores potential mechanisms of action. Methods We conducted a 12-week, parallel-group, controlled feasibility trial of a ketogenic diet, the modified Atkins diet (MAD), compared to a control diet in patients with cognitive impairments attributed to AD. We administered neuropsychological assessments, including memory tests, and collected blood samples at baseline and after 12 weeks of intervention. We performed untargeted lipidomic and targeted metabolomic analyses on plasma samples to detect changes over time. Results A total of 839 individuals were screened to yield 38 randomized participants, with 20 assigned to receive MAD and 18 assigned to receive a control diet. Due to attrition, only 13 in the MAD arm and nine in the control arm were assessed for the primary endpoint, with two participants meeting ketosis levels used to define MAD adherence criteria. The average change from baseline in the Memory Composite Score was 1.37 (95% CI: -0.87, 4.90) points higher in the MAD group compared to the control group. The effect size of the intervention on baseline MAD change was moderate (Cohen's D = 0.57, 95% CI: -0.67, 1.33). In the 15 participants (nine MAD, six control) assessed for lipidomic and metabolomic-lipidomics and metabolomics, 13 metabolites and 10 lipids showed significant changes from baseline to 12 weeks, including triacylglycerols (TAGs, 50:5, 52:5, and 52:6), sphingomyelins (SM, 44:3, 46:0, 46:3, and 48:1), acetoacetate, fatty acylcarnitines, glycerol-3-phosphate, and hydroxy fatty acids. Conclusions Attrition was greatest between baseline and week 6. All participants retained at week 6 completed the study. Despite low rates of adherence by criteria defined a priori, lipidomic and metabolomic analyses indicate significant changes from baseline in circulating lipids and metabolites between MAD and control participants at 12-week postrandomization, and MAD participants showed greater, albeit nonsignificant, improvement in memory.
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Affiliation(s)
- Alison Buchholz
- Department of Psychiatry & Behavioral Sciences, The Johns Hopkins University School of Medicine, Baltimore, MD, United States
- Department of Neurology, The Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Pragney Deme
- Department of Neurology, The Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Joshua F. Betz
- Department of Biostatistics, The Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, United States
| | - Jason Brandt
- Department of Psychiatry & Behavioral Sciences, The Johns Hopkins University School of Medicine, Baltimore, MD, United States
- Department of Neurology, The Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Norman Haughey
- Department of Psychiatry & Behavioral Sciences, The Johns Hopkins University School of Medicine, Baltimore, MD, United States
- Department of Neurology, The Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Mackenzie C. Cervenka
- Department of Neurology, The Johns Hopkins University School of Medicine, Baltimore, MD, United States
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Yang X, Raman S, Buchholz A, Morra LF, Kang JY, Kim MJ, Del Bene VA, Kamath V. A - 11 Cognitive and Clinical Correlates of Olfactory Function in Adults with Epilepsy. Arch Clin Neuropsychol 2023; 38:1160. [PMID: 37807133 DOI: 10.1093/arclin/acad067.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/10/2023] Open
Abstract
OBJECTIVE Olfactory dysfunction is well-documented in epilepsy. We recently found that olfactory assessment may have clinical utility in identifying surgical candidates with intractable epilepsy who benefit from magnetic resonance-guided laser interstitial thermal therapy (MRgLiTT). However, the demographic, clinical, and cognitive correlates of olfaction in epilepsy remain unclear and could aid in understanding its potential utility in clinical examinations. METHOD We identified 60 outpatients with epilepsy (mean age = 38.22 ± 13.84 years; 50% male; 89.3% right-handed; seizure location: 45.0% left, 33.3% right, 13.3% bilateral, 8.3% unspecified) referred for neuropsychological evaluation in the Johns Hopkins Division of Medical Psychology Clinic. Neuropsychological evaluation included the 16-item Sniffin' Sticks Odor Identification Test. Linear regression models were used to examine associations between 1) olfaction and demographic/clinical characteristics (age, sex, education, duration of illness, seizure laterality) and 2) olfaction and cognition (processing speed, language, auditory-verbal and visuospatial memory, executive functioning; adjusted for demographic/clinical characteristics). RESULTS Olfactory performance was not significantly associated with demographic or clinical characteristics. Across all participants, better olfactory performance was associated with better auditory-verbal memory (B = 5.04, t(46) = 4.16, p < 0.001) and visual confrontation naming (B = 1.53, t(45) = 4.11, p < 0.001) with correction for multiple comparisons. In a subset with lateralizing epilepsy (n = 47), better odor identification performance remained a significant predictor of the aforementioned cognitive measures with adjustment for demographic and clinical characteristics. CONCLUSIONS Consistent with work in other neurologic conditions, our preliminary findings indicate that olfactory function is associated with verbally-mediated neuropsychological measures in epilepsy. Future studies utilizing pre-surgical neuroimaging will examine the association between olfaction, cognition, and radiographic markers of tissue integrity in epilepsy.
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Diaz-Arias LA, Henry-Barron BJ, Buchholz A, Cervenka MC. Positive impact of a modified Atkins diet on cognition, seizure control, and abnormal movements in an adult with glucose transporter type 1 deficiency syndrome: case report. Neurol Sci 2022; 43:3449-3452. [DOI: 10.1007/s10072-022-05973-5] [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] [Received: 01/04/2022] [Accepted: 02/21/2022] [Indexed: 11/24/2022]
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Del Bene VA, Crawford JL, Gómez-Gastiasoro A, Vannorsdall TD, Buchholz A, Ojeda N, Harris JC, Jinnah HA, Schretlen DJ. Microstructural white matter abnormalities in Lesch-Nyhan disease. Eur J Neurosci 2022; 55:264-276. [PMID: 34738666 PMCID: PMC9100837 DOI: 10.1111/ejn.15512] [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] [Received: 07/06/2020] [Revised: 09/27/2021] [Accepted: 10/20/2021] [Indexed: 01/03/2023]
Abstract
Lesch-Nyhan disease is a rare, sex-linked, genetic neurodevelopmental disorder that is characterized by hyperuricemia, dystonia, cognitive impairment and recurrent self-injury. We previously found reduced brain white matter volume in patients with Lesch-Nyhan disease compared with healthy adults using voxel-based morphometry. Here, we address the structural integrity of white matter via diffusion tensor imaging. We hypothesized that white matter integrity would be decreased in men with Lesch-Nyhan disease and to a lesser extent in men with a milder variant of the disease (Lesch-Nyhan variant) relative to healthy men. After acquiring diffusion-weighted brain images from Lesch-Nyhan disease (n = 5), Lesch-Nyhan variant (n = 6) and healthy participants (n = 10), we used both tract-based spatial statistics and a regions of interest approach to analyse between-group fractional anisotropy differences. We first replicated earlier findings of reduced intracranial, grey matter and white matter volumes in patients. We then discovered marked reductions of fractional anisotropy relative to the healthy control group. The Lesch-Nyhan disease group showed more pronounced reductions in white matter integrity than the Lesch-Nyhan variant group. In addition to whole brain fractional anisotropy group differences, reductions in white matter integrity were observed in the corpus callosum, corona radiata, cingulum, internal capsule and superior longitudinal fasciculus. Moreover, the variant group had attenuated dystonia severity symptoms and cognitive deficits. These findings highlight the need to better understand the role of white matter in Lesch-Nyhan disease.
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Affiliation(s)
- Victor A. Del Bene
- Department of Psychiatry and Behavioral Sciences, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA,Department of Neurology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Jeffrey L. Crawford
- Department of Psychiatry and Behavioral Sciences, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | | | - Tracy D. Vannorsdall
- Department of Psychiatry and Behavioral Sciences, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA,Department of Neurology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Alison Buchholz
- Department of Psychiatry and Behavioral Sciences, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Natalia Ojeda
- Department of Neurology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - James C. Harris
- Department of Psychiatry and Behavioral Sciences, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Hyder A. Jinnah
- Departments of Neurology and Human Genetics, Emory University School of Medicine, Atlanta, Georgia, USA
| | - David J. Schretlen
- Department of Psychiatry and Behavioral Sciences, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA,Russell M. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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Kirchhoff K, Beirer M, Völk C, Buchholz A, Biberthaler P, Kirchhoff C. [Lesions of the triceps tendon : Diagnostics, management, treatment]. Unfallchirurg 2021; 125:73-82. [PMID: 34910226 DOI: 10.1007/s00113-021-01103-6] [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] [Accepted: 10/18/2021] [Indexed: 11/30/2022]
Abstract
The triceps brachii muscle is the main extender of the elbow joint. Triceps tendon rupture or tearing presents a rare injury pattern in general. Distal tendon ruptures occur most commonly in the area of the insertion of the olecranon. Fractures of the radial head are reported as the most common concomitant injury. In many cases, pre-existing degenerative damage predisposes for tendon injury. These include local steroid injections, anabolic steroid abuse, renal insufficiency requiring dialysis, hyperparathyroidism, lupus erythematosus and Marfan's syndrome. However, the most frequent trauma mechanism is a direct fall onto the extended forearm or a blow to the elbow. Beside clinical examination and sonography, magnetic resonance imaging is the diagnostic gold standard. The treatment of triceps tendon injuries includes conservative as well as operative approaches, whereby the indications for surgical treatment must be generously considered depending on the patient's age, functional demands of the patient, involvement of the dominant extremity as well as on the extent of the tendon rupture.
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Affiliation(s)
- K Kirchhoff
- Klinik und Poliklinik für Unfallchirurgie, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675, München, Deutschland
| | - M Beirer
- Klinik für Unfallchirurgie und Orthopädie, Schwarzwald-Baar Klinikum, Klinikstr. 11, 78052, Villingen-Schwenningen, Deutschland
| | - C Völk
- Klinik und Poliklinik für Unfallchirurgie, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675, München, Deutschland
| | - A Buchholz
- Klinik und Poliklinik für Unfallchirurgie, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675, München, Deutschland
| | - P Biberthaler
- Klinik und Poliklinik für Unfallchirurgie, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675, München, Deutschland
| | - C Kirchhoff
- Klinik und Poliklinik für Unfallchirurgie, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675, München, Deutschland.
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Rubin LH, Severson J, Marcotte TD, Savin MJ, Best A, Johnson S, Cosman J, Merickel M, Buchholz A, Del Bene VA, Eldred L, Sacktor NC, Fuchs JB, Althoff KN, Moore RD. Tablet-Based Cognitive Impairment Screening for Adults With HIV Seeking Clinical Care: Observational Study. JMIR Ment Health 2021; 8:e25660. [PMID: 34499048 PMCID: PMC8461534 DOI: 10.2196/25660] [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] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 05/15/2021] [Accepted: 05/25/2021] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Neurological complications including cognitive impairment persist among people with HIV on antiretrovirals; however, cognitive screening is not routinely conducted in HIV clinics. OBJECTIVE Our objective for this study was 3-fold: (1) to determine the feasibility of implementing an iPad-based cognitive impairment screener among adults seeking HIV care, (2) to examine the psychometric properties of the tool, and (3) to examine predictors of cognitive impairment using the tool. METHODS A convenience sample of participants completed Brain Baseline Assessment of Cognition and Everyday Functioning (BRACE), which included (1) Trail Making Test Part A, measuring psychomotor speed; (2) Trail Making Test Part B, measuring set-shifting; (3) Stroop Color, measuring processing speed; and (4) the Visual-Spatial Learning Test. Global neuropsychological function was estimated as mean T score performance on the 4 outcomes. Impairment on each test or for the global mean was defined as a T score ≤40. Subgroups of participants repeated the tests 4 weeks or >6 months after completing the first test to evaluate intraperson test-retest reliability and practice effects (improvements in performance due to repeated test exposure). An additional subgroup completed a lengthier cognitive battery concurrently to assess validity. Relevant factors were abstracted from electronic medical records to examine predictors of global neuropsychological function. RESULTS The study population consisted of 404 people with HIV (age: mean 53.6 years; race: 332/404, 82% Black; 34/404, 8% White, 10/404, 2% American Indian/Alaskan Native; 28/404, 7% other and 230/404, 58% male; 174/404, 42% female) of whom 99% (402/404) were on antiretroviral therapy. Participants completed BRACE in a mean of 12 minutes (SD 3.2), and impairment was demonstrated by 34% (136/404) on Trail Making Test A, 44% (177/404) on Trail Making Test B, 40% (161/404) on Stroop Color, and 17% (67/404) on Visual-Spatial Learning Test. Global impairment was demonstrated by 103 out of 404 (25%). Test-retest reliability for the subset of participants (n=26) repeating the measure at 4 weeks was 0.81 and for the subset of participants (n=67) repeating the measure almost 1 year later (days: median 294, IQR 50) was 0.63. There were no significant practice effects at either time point (P=.20 and P=.68, respectively). With respect for validity, the correlation between global impairment on the lengthier cognitive battery and BRACE was 0.63 (n=61; P<.001), with 84% sensitivity and 94% specificity to impairment on the lengthier cognitive battery. CONCLUSIONS We were able to successfully implement BRACE and estimate cognitive impairment burden in the context of routine clinic care. BRACE was also shown to have good psychometric properties. This easy-to-use tool in clinical settings may facilitate the care needs of people with HIV as cognitive impairment continues to remain a concern in people with HIV.
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Affiliation(s)
- Leah H Rubin
- Johns Hopkins University, Baltimore, MD, United States
| | | | | | | | - Allen Best
- Digital Artefacts LLC, Iowa City, IA, United States
| | | | | | | | | | | | - Lois Eldred
- Johns Hopkins University, Baltimore, MD, United States
| | - Ned C Sacktor
- Johns Hopkins University, Baltimore, MD, United States
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Gronefeld G, Buchholz A, Boecker D, Klein G, Butter C, Suling A, Felk A, Hauser T, Baensch D, Wegscheider K. Who is shocked and who survives? A multi-state analysis of the NORDIC ICD trial. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.0359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background/Purpose
The interaction between the risk of arrhythmic death and a competing non-arrhythmic risk of death in patients suitable for implantable cardioverter defibrillator (ICD) implantation is not well understood. Commonly, identification of subpopulations with the largest benefit of ICD implantation has been performed by separate risk models for the outcomes death and appropriate shock therapy. The interrelation between the outcomes was not sufficiently studied.
Methods
Data were derived from the safety population of the multinational, prospectively randomized NORDIC ICD trial (N=1067) with real-word patients implanted with a single, dual or triple chamber ICD for primary or secondary prevention. Since all outcome adjudication was performed by an independent Clinical Event Committee supported by full telemonitoring data transmission, a high validity of ICD interventions could be achieved. To investigate the impact of baseline characteristics on time to first appropriate shock, death without prior appropriate shock therapy and death after appropriate shock therapy, a multi-state Cox model was computed. Missing data have been multiply imputed before analysis.
Results
At 36 months follow-up, 86.4% of the patients were alive (7.8% after appropriate shock). 11.0% and 2.6% patients died without or after a foregoing appropriate shock, respectively. The primary randomization allocation showed no significant effect on the 3 outcome types. Higher age (per 5 years) and NYHA functional class (≥III vs. ≤II) were associated with an increased risk of death without appropriate shock (HR 1.31, 95% CI 1.14–1.50, p<0.001, and HR 2.17, 95% CI 1.26–3.74, p=0.005, fig.1, accordingly). The presence of diabetes mellitus at baseline was associated with the reduced risk of the occurrence of an appropriate shock (HR 0.57, 95% CI 0.35–0.92, p=0.022). Patients with secondary prevention indication for an ICD had very high risk for an appropriate shock after ICD implantation (HR 3.21, 95% CI 2.02–5.11, p<0.001), but not for death without or with previous appropriate shock (HR 1.42, 95% CI 0.72–2.79, p=0.306, or HR 0.73, 95% CI 0.23–2.34, p=0.594 after ICD shock). Renal insufficiency and ischemic vs. nonischemic disease showed a significantly increased global effect on all three transitions (HR 1.63, 95% CI 1.18–2.24, p=0.003 and HR 1.53, 95% CI 1.06–2.20, p=0.025, respectively).
Conclusion
The new multi-state model shows the interrelation between appropriate shocks and death, as well a remarkable variation of risk factors for the transitions. Specifically, the presence of higher age and NYHA functional class ≥III at baseline were strong prognostic factors for all-cause mortality without a foregoing shock therapy, but were not predictive for an appropriate shock therapy. In this all-comer study, a significant discriminator predictive for appropriate shock therapy, but not for death was an indication for secondary prevention of sudden cardiac death.
Multi-state graph for NYHA class
Funding Acknowledgement
Type of funding source: Private company. Main funding source(s): This work was supported by Biotronik SE & Co. KG (Berlin, Germany)
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Affiliation(s)
| | - A Buchholz
- University Medical Center Hamburg Eppendorf, Department of Medical Biometry and Epidemiology, Hamburg, Germany
| | - D Boecker
- St. Marien Hospital Hamm, Hamm, Germany
| | - G Klein
- Hannover Heart Center, Hannover, Germany
| | - C Butter
- Brandenburg Heart Center, Bernau bei Berlin, Germany
| | - A Suling
- University Medical Center Hamburg Eppendorf, Department of Medical Biometry and Epidemiology, Hamburg, Germany
| | - A Felk
- BIOTRONIK, Berlin, Germany
| | | | - D Baensch
- KMG Clinic, Department of Rhythmology and Clinical Electrophysiology, Güstrow, Germany
| | - K Wegscheider
- University Medical Center Hamburg Eppendorf, Department of Medical Biometry and Epidemiology, Hamburg, Germany
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Kebbe M, Perez A, Buchholz A, Scott SD, McHugh TLF, Dyson MP, Ball GDC. Health care providers' weight management practices for adolescent obesity and alignment with clinical practice guidelines: a multi-centre, qualitative study. BMC Health Serv Res 2020; 20:850. [PMID: 32912259 PMCID: PMC7488259 DOI: 10.1186/s12913-020-05702-8] [Citation(s) in RCA: 3] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 08/31/2020] [Indexed: 12/02/2022] Open
Abstract
Background Clinical practice guidelines (CPGs) include evidence-based recommendations for managing obesity in adolescents. However, information on how health care providers (HCPs) implement these recommendations in day-to-day practice is limited. Our objectives were to explore how HCPs deliver weight management health services to adolescents with obesity and describe the extent to which their reported practices align with recent CPGs for managing pediatric obesity. Methods From July 2017 to January 2018, we conducted a qualitative study that used purposeful sampling to recruit HCPs with experience in adolescent weight management from multidisciplinary, pediatric weight management clinics in Edmonton and Ottawa, Canada. Data were collected using audio-recorded focus groups (4–6 participants/group; 60–90 min in length). We applied inductive, semantic thematic analysis and the congruent methodological approach to analyze our data, which included transcripts, field notes, and memos. Qualitative data were compared to recent CPGs for pediatric obesity that were published by the Endocrine Society in 2017. Of the 12 obesity ‘treatment-related’ recommendations, four were directly relevant to the current study. Results Data were collected through three focus groups with 16 HCPs (n = 10 Edmonton; n = 6 Ottawa; 94% female; 100% Caucasian), including dietitians, exercise specialists, nurses, pediatricians, psychologists, and social workers. We identified three main themes that we later compared with CPG recommendations, including: (i) discuss realistic expectations regarding weight management (e.g., shift focus from weight to health; explore family cohesiveness; foster delayed vs instant gratification), (ii) personalize weight management (e.g., address personal barriers to change; consider developmental readiness), and (iii) exhibit non-biased attitudes and practices (e.g., de-emphasize individual causes of obesity; avoid making assumptions about lifestyle behaviors based on weight). Based on these qualitative findings, HCPs applied all four CPG recommendations in their practices. Conclusions HCPs provided practical insights into what and how they delivered weight management for adolescents, which included operationalizing relevant CPG recommendations in their practices.
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Affiliation(s)
- M Kebbe
- Department of Pediatrics, Faculty of Medicine & Dentistry, Edmonton Clinic Health Academy, University of Alberta, 11405 - 87 Avenue, Edmonton, Alberta, T6G 1C9, Canada
| | - A Perez
- Department of Pediatrics, Faculty of Medicine & Dentistry, Edmonton Clinic Health Academy, University of Alberta, 11405 - 87 Avenue, Edmonton, Alberta, T6G 1C9, Canada
| | - A Buchholz
- Centre for Healthy Active Living, Children's Hospital of Eastern Ontario, Ottawa, Ontario, Canada
| | - S D Scott
- Faculty of Nursing, University of Alberta, Edmonton, Alberta, Canada
| | - T-L F McHugh
- Faculty of Kinesiology, Sport, and Recreation, University of Alberta, Edmonton, Alberta, Canada
| | - M P Dyson
- Department of Pediatrics, Faculty of Medicine & Dentistry, Edmonton Clinic Health Academy, University of Alberta, 11405 - 87 Avenue, Edmonton, Alberta, T6G 1C9, Canada
| | - G D C Ball
- Department of Pediatrics, Faculty of Medicine & Dentistry, Edmonton Clinic Health Academy, University of Alberta, 11405 - 87 Avenue, Edmonton, Alberta, T6G 1C9, Canada.
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Brandt J, Buchholz A, Henry-Barron B, Vizthum D, Avramopoulos D, Cervenka MC. Preliminary Report on the Feasibility and Efficacy of the Modified Atkins Diet for Treatment of Mild Cognitive Impairment and Early Alzheimer's Disease. J Alzheimers Dis 2020; 68:969-981. [PMID: 30856112 DOI: 10.3233/jad-180995] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [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: 11/15/2022]
Abstract
Ketone bodies, the products of fat metabolism, are a source of energy for the brain and are available even when glucose supplies are inadequate (such as with severe carbohydrate deprivation) or its metabolism is faulty (as it is in Alzheimer's disease). This phase I/II randomized clinical trial examined the feasibility of using a modified Atkins diet (MAD) to induce ketogenesis in persons with mild cognitive impairment (MCI) or early AD, and the effect of this diet on memory and other clinical outcomes. In the first 2.5 years of active recruitment, only 27 eligible and willing patients enrolled. After extensive assessment and education, they and their study partners were randomly assigned for 12 weeks to either the MAD or the National Institute on Aging (NIA) recommended diet for seniors. As of April 2018, 9 patients in the MAD arm and 5 in the NIA arm have completed the trial. In spite of extensive teaching, coaching, and monitoring, adherence to both diets was only fair. Among those in the MAD arm who generated at least trace amounts of urinary ketones, there was a large (effect size = 0.53) and statistically significant (p = 0.03) increase in Memory Composite Score between the baseline and week-6 assessment. MAD participants also reported increased energy between baseline and week-6 assessment. Despite challenges to implementing this trial, resulting in a small sample, our preliminary data suggest that the generation of even trace ketones might enhance episodic memory and patient-reported vitality in very early AD.
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Affiliation(s)
- Jason Brandt
- Department of Psychiatry & Behavioral Sciences, The Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Department of Neurology, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Alison Buchholz
- Department of Psychiatry & Behavioral Sciences, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Bobbie Henry-Barron
- Institute for Clinical and Translational Research, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Diane Vizthum
- Institute for Clinical and Translational Research, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Dimitrios Avramopoulos
- Department of Psychiatry & Behavioral Sciences, The Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Institute of Genetic Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Mackenzie C Cervenka
- Department of Neurology, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
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Spies M, Meyer-Steinkamp R, Stracke R, Buchholz A. Development of a modular ICF-based core set for the German substance use disorders treatment. Disabil Rehabil 2020; 44:1234-1242. [PMID: 32723115 DOI: 10.1080/09638288.2020.1799246] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 10/23/2022]
Abstract
PURPOSE We aimed to develop a modular Core Set based on the International Classification of Functioning, Disability and Health (ICF) for describing functioning in patients with substance use disorders (SUDs). To match the structure of the German health service system, the Core Set was split into modules for different service segments. METHODS We followed a consensus process including several preparatory studies. To identify candidate ICF categories, we performed an ICF linking of guideline-recommended assessments, patient focus groups and patient and expert surveys. Categories were prioritized for different service segments and compiled into preliminary modules. The Core Set was tested in 13 treatment sites. Health professionals rated each category's relevance, and contents of the Modular ICF-based Core Set for SUDs (MCSS) were compared to patient-reported treatment goals. An advisory board decided on revisions to the MCSS. RESULTS The MCSS consists of a basic module (25 categories) and five additional modules for these treatment segments: counselling (8), qualified withdrawal (6), orientation (7), rehabilitation (32), and social integration services (10). CONCLUSIONS The MCSS provides a framework for harmonizing communication, documentation and interface management in German SUD health services. The basic module, consisting of 25 categories, can be employed as a Brief ICF Core Set.Implications for rehabilitationThe MCSS can serve as a standard for describing functioning in patients with SUDs in Germany, as well as harmonize communication and reporting of treatment relevant information.In clinical practice, the MCSS can be used for the structured assessment of psychosocial problems and participation restrictions, goal setting, and outcome evaluation.Although the MCSS was developed in Germany, its proximity to the themes frequently identified in the literature regarding SUDs internationally suggests that it may be of use in other countries as well.The basic module may be employed as a Brief ICF Core Set.
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Affiliation(s)
- M Spies
- Department for Medical Psychology, University Medical Centre, Hamburg, Germany
| | | | - R Stracke
- Alida Schmidt-Stiftung, Hamburg, Germany
| | - A Buchholz
- Department for Medical Psychology, University Medical Centre, Hamburg, Germany
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Yan C, Nie W, Vogel AL, Dada L, Lehtipalo K, Stolzenburg D, Wagner R, Rissanen MP, Xiao M, Ahonen L, Fischer L, Rose C, Bianchi F, Gordon H, Simon M, Heinritzi M, Garmash O, Roldin P, Dias A, Ye P, Hofbauer V, Amorim A, Bauer PS, Bergen A, Bernhammer AK, Breitenlechner M, Brilke S, Buchholz A, Mazon SB, Canagaratna MR, Chen X, Ding A, Dommen J, Draper DC, Duplissy J, Frege C, Heyn C, Guida R, Hakala J, Heikkinen L, Hoyle CR, Jokinen T, Kangasluoma J, Kirkby J, Kontkanen J, Kürten A, Lawler MJ, Mai H, Mathot S, Mauldin RL, Molteni U, Nichman L, Nieminen T, Nowak J, Ojdanic A, Onnela A, Pajunoja A, Petäjä T, Piel F, Quéléver LLJ, Sarnela N, Schallhart S, Sengupta K, Sipilä M, Tomé A, Tröstl J, Väisänen O, Wagner AC, Ylisirniö A, Zha Q, Baltensperger U, Carslaw KS, Curtius J, Flagan RC, Hansel A, Riipinen I, Smith JN, Virtanen A, Winkler PM, Donahue NM, Kerminen VM, Kulmala M, Ehn M, Worsnop DR. Size-dependent influence of NO x on the growth rates of organic aerosol particles. Sci Adv 2020; 6:eaay4945. [PMID: 32518819 PMCID: PMC7253163 DOI: 10.1126/sciadv.aay4945] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Accepted: 03/19/2020] [Indexed: 05/24/2023]
Abstract
Atmospheric new-particle formation (NPF) affects climate by contributing to a large fraction of the cloud condensation nuclei (CCN). Highly oxygenated organic molecules (HOMs) drive the early particle growth and therefore substantially influence the survival of newly formed particles to CCN. Nitrogen oxide (NOx) is known to suppress the NPF driven by HOMs, but the underlying mechanism remains largely unclear. Here, we examine the response of particle growth to the changes of HOM formation caused by NOx. We show that NOx suppresses particle growth in general, but the suppression is rather nonuniform and size dependent, which can be quantitatively explained by the shifted HOM volatility after adding NOx. By illustrating how NOx affects the early growth of new particles, a critical step of CCN formation, our results help provide a refined assessment of the potential climatic effects caused by the diverse changes of NOx level in forest regions around the globe.
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Affiliation(s)
- C. Yan
- Institute for Atmospheric and Earth System Research/INAR–Physics, Faculty of Science, University of Helsinki, 00560 Helsinki, Finland
| | - W. Nie
- Joint International Research Laboratory of Atmospheric and Earth System Sciences, School of Atmospheric Sciences, Nanjing University, Nanjing, China
| | - A. L. Vogel
- CERN, CH-1211, Geneva, Switzerland
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - L. Dada
- Institute for Atmospheric and Earth System Research/INAR–Physics, Faculty of Science, University of Helsinki, 00560 Helsinki, Finland
| | - K. Lehtipalo
- Institute for Atmospheric and Earth System Research/INAR–Physics, Faculty of Science, University of Helsinki, 00560 Helsinki, Finland
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland
- Finnish Meteorological Institute, Erik Palménin aukio 1, 00560 Helsinki, Finland
| | - D. Stolzenburg
- University of Vienna, Faculty of Physics, Boltzmanngasse 5, 1090 Wien, Austria
| | - R. Wagner
- Institute for Atmospheric and Earth System Research/INAR–Physics, Faculty of Science, University of Helsinki, 00560 Helsinki, Finland
| | - M. P. Rissanen
- Institute for Atmospheric and Earth System Research/INAR–Physics, Faculty of Science, University of Helsinki, 00560 Helsinki, Finland
| | - M. Xiao
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - L. Ahonen
- Institute for Atmospheric and Earth System Research/INAR–Physics, Faculty of Science, University of Helsinki, 00560 Helsinki, Finland
| | - L. Fischer
- University of Innsbruck, Institute for Ion and Applied Physics, 6020 Innsbruck, Austria
| | - C. Rose
- Institute for Atmospheric and Earth System Research/INAR–Physics, Faculty of Science, University of Helsinki, 00560 Helsinki, Finland
| | - F. Bianchi
- Institute for Atmospheric and Earth System Research/INAR–Physics, Faculty of Science, University of Helsinki, 00560 Helsinki, Finland
- Aerosol and Haze Laboratory, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, China
| | - H. Gordon
- CERN, CH-1211, Geneva, Switzerland
- University of Leeds, Leeds LS2 9JT, UK
| | - M. Simon
- Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, Altenhöferallee 1, 60438 Frankfurt am Main, Germany
| | - M. Heinritzi
- Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, Altenhöferallee 1, 60438 Frankfurt am Main, Germany
| | - O. Garmash
- Institute for Atmospheric and Earth System Research/INAR–Physics, Faculty of Science, University of Helsinki, 00560 Helsinki, Finland
| | - P. Roldin
- Division of Nuclear Physics, Department of Physics, Lund University, P. O. Box 118, SE-221 00 Lund, Sweden
| | - A. Dias
- CERN, CH-1211, Geneva, Switzerland
- CENTRA and FCUL, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal
| | - P. Ye
- Carnegie Mellon University Center for Atmospheric Particle Studies, 5000 Forbes Ave., Pittsburgh, PA 15213, USA
- Aerodyne Research Inc., Billerica, MA 01821, USA
| | - V. Hofbauer
- Carnegie Mellon University Center for Atmospheric Particle Studies, 5000 Forbes Ave., Pittsburgh, PA 15213, USA
| | - A. Amorim
- CENTRA and FCUL, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal
| | - P. S. Bauer
- University of Vienna, Faculty of Physics, Boltzmanngasse 5, 1090 Wien, Austria
| | - A. Bergen
- Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, Altenhöferallee 1, 60438 Frankfurt am Main, Germany
| | - A.-K. Bernhammer
- University of Innsbruck, Institute for Ion and Applied Physics, 6020 Innsbruck, Austria
| | - M. Breitenlechner
- University of Innsbruck, Institute for Ion and Applied Physics, 6020 Innsbruck, Austria
| | - S. Brilke
- University of Vienna, Faculty of Physics, Boltzmanngasse 5, 1090 Wien, Austria
- Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, Altenhöferallee 1, 60438 Frankfurt am Main, Germany
| | - A. Buchholz
- University of Eastern Finland, Department of Applied Physics, P.O. Box 1627, 70211 Kuopio, Finland
| | - S. Buenrostro Mazon
- Institute for Atmospheric and Earth System Research/INAR–Physics, Faculty of Science, University of Helsinki, 00560 Helsinki, Finland
| | | | - X. Chen
- Institute for Atmospheric and Earth System Research/INAR–Physics, Faculty of Science, University of Helsinki, 00560 Helsinki, Finland
| | - A. Ding
- Joint International Research Laboratory of Atmospheric and Earth System Sciences, School of Atmospheric Sciences, Nanjing University, Nanjing, China
| | - J. Dommen
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - D. C. Draper
- Department of Chemistry, University of California, Irvine, CA 92697, USA
| | - J. Duplissy
- Institute for Atmospheric and Earth System Research/INAR–Physics, Faculty of Science, University of Helsinki, 00560 Helsinki, Finland
| | - C. Frege
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - C. Heyn
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - R. Guida
- CERN, CH-1211, Geneva, Switzerland
| | - J. Hakala
- Institute for Atmospheric and Earth System Research/INAR–Physics, Faculty of Science, University of Helsinki, 00560 Helsinki, Finland
| | - L. Heikkinen
- Institute for Atmospheric and Earth System Research/INAR–Physics, Faculty of Science, University of Helsinki, 00560 Helsinki, Finland
| | - C. R. Hoyle
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - T. Jokinen
- Institute for Atmospheric and Earth System Research/INAR–Physics, Faculty of Science, University of Helsinki, 00560 Helsinki, Finland
| | - J. Kangasluoma
- Institute for Atmospheric and Earth System Research/INAR–Physics, Faculty of Science, University of Helsinki, 00560 Helsinki, Finland
- Aerosol and Haze Laboratory, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, China
| | - J. Kirkby
- CERN, CH-1211, Geneva, Switzerland
- Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, Altenhöferallee 1, 60438 Frankfurt am Main, Germany
| | - J. Kontkanen
- Institute for Atmospheric and Earth System Research/INAR–Physics, Faculty of Science, University of Helsinki, 00560 Helsinki, Finland
| | - A. Kürten
- Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, Altenhöferallee 1, 60438 Frankfurt am Main, Germany
| | - M. J. Lawler
- Department of Chemistry, University of California, Irvine, CA 92697, USA
| | - H. Mai
- California Institute of Technology, 210-41, Pasadena, CA 91125, USA
| | | | - R. L. Mauldin
- Carnegie Mellon University Center for Atmospheric Particle Studies, 5000 Forbes Ave., Pittsburgh, PA 15213, USA
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309, USA
| | - U. Molteni
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - L. Nichman
- School of Earth and Environmental Science, University of Manchester, Manchester M13 9PL, UK
| | - T. Nieminen
- Institute for Atmospheric and Earth System Research/INAR–Physics, Faculty of Science, University of Helsinki, 00560 Helsinki, Finland
| | - J. Nowak
- Aerodyne Research Inc., Billerica, MA 01821, USA
| | - A. Ojdanic
- University of Vienna, Faculty of Physics, Boltzmanngasse 5, 1090 Wien, Austria
| | | | - A. Pajunoja
- University of Eastern Finland, Department of Applied Physics, P.O. Box 1627, 70211 Kuopio, Finland
| | - T. Petäjä
- Institute for Atmospheric and Earth System Research/INAR–Physics, Faculty of Science, University of Helsinki, 00560 Helsinki, Finland
- Joint International Research Laboratory of Atmospheric and Earth System Sciences, School of Atmospheric Sciences, Nanjing University, Nanjing, China
| | - F. Piel
- Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, Altenhöferallee 1, 60438 Frankfurt am Main, Germany
| | - L. L. J. Quéléver
- Institute for Atmospheric and Earth System Research/INAR–Physics, Faculty of Science, University of Helsinki, 00560 Helsinki, Finland
| | - N. Sarnela
- Institute for Atmospheric and Earth System Research/INAR–Physics, Faculty of Science, University of Helsinki, 00560 Helsinki, Finland
| | - S. Schallhart
- Institute for Atmospheric and Earth System Research/INAR–Physics, Faculty of Science, University of Helsinki, 00560 Helsinki, Finland
| | | | - M. Sipilä
- Institute for Atmospheric and Earth System Research/INAR–Physics, Faculty of Science, University of Helsinki, 00560 Helsinki, Finland
| | - A. Tomé
- IDL Universidade da Beira Interior, Covilhã, Portugal
| | - J. Tröstl
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - O. Väisänen
- University of Eastern Finland, Department of Applied Physics, P.O. Box 1627, 70211 Kuopio, Finland
| | - A. C. Wagner
- Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, Altenhöferallee 1, 60438 Frankfurt am Main, Germany
| | - A. Ylisirniö
- University of Eastern Finland, Department of Applied Physics, P.O. Box 1627, 70211 Kuopio, Finland
| | - Q. Zha
- Institute for Atmospheric and Earth System Research/INAR–Physics, Faculty of Science, University of Helsinki, 00560 Helsinki, Finland
| | - U. Baltensperger
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | | | - J. Curtius
- Goethe University Frankfurt, Institute for Atmospheric and Environmental Sciences, Altenhöferallee 1, 60438 Frankfurt am Main, Germany
| | - R. C. Flagan
- California Institute of Technology, 210-41, Pasadena, CA 91125, USA
| | - A. Hansel
- Institute for Atmospheric and Earth System Research/INAR–Physics, Faculty of Science, University of Helsinki, 00560 Helsinki, Finland
- University of Innsbruck, Institute for Ion and Applied Physics, 6020 Innsbruck, Austria
- IONICON GesmbH, Innsbruck, Austria
| | - I. Riipinen
- Department of Environmental Science and Analytical Chemistry (ACES) and Bolin Centre for Climate Research, Stockholm University, 10691 Stockholm, Sweden
| | - J. N. Smith
- Department of Chemistry, University of California, Irvine, CA 92697, USA
| | - A. Virtanen
- University of Eastern Finland, Department of Applied Physics, P.O. Box 1627, 70211 Kuopio, Finland
| | - P. M. Winkler
- University of Vienna, Faculty of Physics, Boltzmanngasse 5, 1090 Wien, Austria
| | - N. M. Donahue
- Carnegie Mellon University Center for Atmospheric Particle Studies, 5000 Forbes Ave., Pittsburgh, PA 15213, USA
| | - V.-M. Kerminen
- Institute for Atmospheric and Earth System Research/INAR–Physics, Faculty of Science, University of Helsinki, 00560 Helsinki, Finland
| | - M. Kulmala
- Institute for Atmospheric and Earth System Research/INAR–Physics, Faculty of Science, University of Helsinki, 00560 Helsinki, Finland
- Joint International Research Laboratory of Atmospheric and Earth System Sciences, School of Atmospheric Sciences, Nanjing University, Nanjing, China
- Aerosol and Haze Laboratory, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, China
- Helsinki Institute of Physics, FI-00014 Helsinki, Finland
| | - M. Ehn
- Institute for Atmospheric and Earth System Research/INAR–Physics, Faculty of Science, University of Helsinki, 00560 Helsinki, Finland
| | - D. R. Worsnop
- Institute for Atmospheric and Earth System Research/INAR–Physics, Faculty of Science, University of Helsinki, 00560 Helsinki, Finland
- Aerodyne Research Inc., Billerica, MA 01821, USA
- University of Eastern Finland, Department of Applied Physics, P.O. Box 1627, 70211 Kuopio, Finland
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Specka M, Buchholz A, Kuhlmann T, Haasen C, Scherbaum N. Outcome of inpatient opiate detoxification treatment in immigrants as compared to native Germans. Eur Psychiatry 2020; 25:242-8. [DOI: 10.1016/j.eurpsy.2009.03.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2008] [Revised: 03/04/2009] [Accepted: 03/07/2009] [Indexed: 10/20/2022] Open
Abstract
AbstractBackgroundImmigration is a factor with effects on the course of substance abuse and treatment response, however there is little consistent data regarding outcome of inpatient opiate detoxification treatment in immigrants as compared to native patients.MethodsPatient history and the success of current detoxification treatment were systematically documented in a multicenter study in Germany which included 10 psychiatric hospitals with specialized detoxification wards.ResultsOut of 893 patients, 240 (27%) had a migration history. We further analyzed the three main groups (German, n = 653; Turkish, n = 58; Russian origin, n = 103). There were significant differences between groups regarding sociodemographic data, drug history, treatment experience and success of current treatment. However, considering the younger age of patients with Russian origin, analysis of younger patients (< 31 years) detected only minor group differences. In multiple logistic regressions age and center showed statistically significant associations with all outcome variables (early dropout, achievement of drug-free urine screen, regular completion of detoxification treatment, and referral to further treatment), while (Russian) origin was associated only with premature termination of treatment.ConclusionYoung men were the main problem group regardless of origin. Significant center effects raise doubts regarding results from monocenter research.
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Kebbe M, Perez A, Buchholz A, McHugh TLF, Scott SD, Richard C, Dyson MP, Ball GDC. End-user perspectives to inform policy and program decisions: a qualitative and quantitative content analysis of lifestyle treatment recommendations by adolescents with obesity. BMC Pediatr 2019; 19:418. [PMID: 31699060 PMCID: PMC6839254 DOI: 10.1186/s12887-019-1749-3] [Citation(s) in RCA: 3] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Accepted: 09/25/2019] [Indexed: 11/12/2022] Open
Abstract
Background Lifestyle modifications represent the first line of treatment in obesity management; however, many adolescents with obesity do not meet lifestyle recommendations. Given that adolescents are rarely consulted during health policy development and in the design of lifestyle interventions, their first-hand experiences, preferences, and priorities may not be represented. Accordingly, our purpose was to explore adolescents’ lifestyle treatment recommendations to inform policy and program decisions. Methods Conducted from July 2017 to January 2018, this study adhered to a qualitative, crosslanguage, patient-oriented design. We recruited 19 13–17-year-old adolescents (body mass index [BMI] ≥85th percentile) seeking multidisciplinary treatment for obesity in geographically and culturally diverse regions of Canada. Adolescents participated in one-on-one, in-person, semi-structured interviews in English or French. Interviews were audio-recorded, transcribed verbatim, managed using NVivo 11, and analyzed using quantitative and qualitative content analysis by two independent researchers. Results Adolescents’ recommendations were organized into five categories, each of which denotes health as a collective responsibility: (i) establish parental support within limits, (ii) improve accessibility and availability of ‘healthy foods’, (iii) limit deceptive practices in food marketing, (iv) improve accessibility and availability of varied physical activity opportunities, and (v) delay school start times. Respect for individual autonomy and decision-making capacity were identified as particularly important, however these were confronted with adolescents’ partial knowledge on nutrition and food literacy. Conclusions Adolescents’ recommendations highlighted multi-level, multi-component factors that influenced their ability to lead healthy lifestyles. Uptake of these recommendations by policy-makers and program developers may be of added value for lifestyle treatment targeting adolescents with obesity.
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Affiliation(s)
- M Kebbe
- Department of Pediatrics, Faculty of Medicine and Dentistry, University of Alberta, Edmonton Clinic Health Academy, 11405 - 87 Avenue, Edmonton, Alberta, Canada
| | - A Perez
- Department of Pediatrics, Faculty of Medicine and Dentistry, University of Alberta, Edmonton Clinic Health Academy, 11405 - 87 Avenue, Edmonton, Alberta, Canada
| | - A Buchholz
- Centre for Healthy Active Living, Children's Hospital of Eastern Ontario, Ottawa, Ontario, Canada
| | - T-L F McHugh
- Faculty of Kinesiology, Sport, and Recreation, University of Alberta, Edmonton, Alberta, Canada
| | - S D Scott
- Faculty of Nursing, University of Alberta, Edmonton, Alberta, Canada
| | - C Richard
- Department of Agricultural, Food, and Nutritional Science, Faculty of Agricultural, Life and Environmental Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - M P Dyson
- Department of Pediatrics, Faculty of Medicine and Dentistry, University of Alberta, Edmonton Clinic Health Academy, 11405 - 87 Avenue, Edmonton, Alberta, Canada
| | - G D C Ball
- Department of Pediatrics, Faculty of Medicine and Dentistry, University of Alberta, Edmonton Clinic Health Academy, 11405 - 87 Avenue, Edmonton, Alberta, Canada.
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Abstract
With an incidence of 3% of all biceps tendon injuries, rupture of the distal biceps tendon is a rare injury but can be associated with significant functional impairment of the elbow. In case of a complete rupture, the diagnosis can be made clinically with a pronounced power deficit, in particular for supination of the forearm. In cases of unclear symptoms magnetic resonance imaging should be included. Regarding the therapeutic approach, there is general consensus in the current literature that surgical treatment with anatomical reconstruction of the tendon footprint is superior to the conservative approach. Various surgical techniques with good biomechanical and clinical results are currently available but no clear superiority of a single technique has so far been demonstrated.
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Affiliation(s)
- C Völk
- Klinik und Poliklinik für Unfallchirurgie, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675, München, Deutschland
| | - S Siebenlist
- Abteilung und Poliklinik für Sportorthopädie, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675, München, Deutschland
| | - C Kirchhoff
- Klinik und Poliklinik für Unfallchirurgie, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675, München, Deutschland
| | - P Biberthaler
- Klinik und Poliklinik für Unfallchirurgie, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675, München, Deutschland
| | - A Buchholz
- Klinik und Poliklinik für Unfallchirurgie, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675, München, Deutschland.
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Kakon GA, Hadjiyannakis S, Sigal RJ, Doucette S, Goldfield GS, Kenny GP, Prud'homme D, Buchholz A, Lamb M, Alberga AS. Edmonton Obesity Staging System for Pediatrics, quality of life and fitness in adolescents with obesity. Obes Sci Pract 2019; 5:449-458. [PMID: 31687169 PMCID: PMC6819975 DOI: 10.1002/osp4.358] [Citation(s) in RCA: 2] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 07/03/2019] [Accepted: 07/05/2019] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Body mass index (BMI) is often used to diagnose obesity in childhood and adolescence but has limitations as an index of obesity-related morbidity. The Edmonton Obesity Staging System for Pediatrics (EOSS-P) is a clinical staging system that uses weight-related comorbidities to determine health risk in paediatric populations. The purpose of this study was to investigate the associations of EOSS-P and BMI percentile with quality of life (QOL), cardiorespiratory fitness (CRF) and muscular strength in adolescents with obesity. METHODS Participants were enrolled at baseline in the Healthy Eating, Aerobic and Resistance Training in Youth trial (BMI = 34.6 ± 4.5 kg m-2, age = 15.6 ± 1.4 years, N = 299). QOL, CRF (peak oxygen uptake, VO2peak) and muscular strength were assessed by the Pediatric QOL Inventory (PedsQL), indirect calorimetry during a maximal treadmill test and eight-repetition maximum bench and leg press tests, respectively. Participants were staged from 0 to 3 (absent to severe health risk) according to EOSS-P. Associations were assessed using age-adjusted and sex-adjusted general linear models. RESULTS Quality of life decreased with increasing EOSS-P stages (p < 0.001). QOL was 75.7 ± 11.4 in stage 0/1, 69.1 ± 13.1 in stage 2 and 55.4 ± 13.0 in stage 3. BMI percentile was associated with VO2peak (β = -0.044 mlO2 kg-1 min-1 per unit increase in BMI percentile, p < 0.001), bench press (β = 0.832 kg per unit increase in BMI percentile, p = 0.029) and leg press (β = 3.992 kg, p = 0.003). There were no significant differences in treadmill time or VO2peak between EOSS-P stages (p > 0.05). CONCLUSION As EOSS-P stages increase, QOL decreases. BMI percentile was negatively associated with CRF and positively associated with muscular strength.
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Affiliation(s)
- G. A. Kakon
- Department of Health, Kinesiology, and Applied PhysiologyConcordia UniversityMontrealQCCanada
| | - S. Hadjiyannakis
- Centre for Healthy Active LivingChildren's Hospital of Eastern Ontario Research InstituteOttawaONCanada
| | - R. J. Sigal
- Departments of Medicine, Cardiac Sciences and Community Health Sciences, Faculties of Medicine and KinesiologyUniversity of CalgaryCalgaryABCanada
- School of Human Kinetics, Faculty of Health SciencesUniversity of OttawaOttawaONCanada
- Clinical Epidemiology ProgramOttawa Hospital Research InstituteOttawaONCanada
| | - S. Doucette
- Community Health and EpidemiologyDalhousie UniversityHalifaxNSCanada
| | - G. S. Goldfield
- Centre for Healthy Active LivingChildren's Hospital of Eastern Ontario Research InstituteOttawaONCanada
| | - G. P. Kenny
- School of Human Kinetics, Faculty of Health SciencesUniversity of OttawaOttawaONCanada
- Clinical Epidemiology ProgramOttawa Hospital Research InstituteOttawaONCanada
| | - D. Prud'homme
- School of Human Kinetics, Faculty of Health SciencesUniversity of OttawaOttawaONCanada
- Institut du Savoir MontfortOttawaONCanada
| | - A. Buchholz
- Centre for Healthy Active LivingChildren's Hospital of Eastern Ontario Research InstituteOttawaONCanada
- Department of PsychologyCarleton UniversityOttawaONCanada
| | - M. Lamb
- Centre for Healthy Active LivingChildren's Hospital of Eastern Ontario Research InstituteOttawaONCanada
- Department of PsychologyCarleton UniversityOttawaONCanada
| | - A. S. Alberga
- Department of Health, Kinesiology, and Applied PhysiologyConcordia UniversityMontrealQCCanada
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Völk C, Siebenlist S, Kirchhoff C, Biberthaler P, Buchholz A. Intramedulläre Button-Refixation der distalen Bizepssehne in „Single-incision“-Technik. Unfallchirurg 2019; 122:812-813. [DOI: 10.1007/s00113-019-00718-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Fischer F, Helmer S, Rogge A, Arraras JI, Buchholz A, Hannawa A, Horneber M, Kiss A, Rose M, Söllner W, Stein B, Weis J, Schofield P, Witt CM. Outcomes and outcome measures used in evaluation of communication training in oncology - a systematic literature review, an expert workshop, and recommendations for future research. BMC Cancer 2019; 19:808. [PMID: 31412805 PMCID: PMC6694634 DOI: 10.1186/s12885-019-6022-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Accepted: 08/06/2019] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Communication between health care provider and patients in oncology presents challenges. Communication skills training have been frequently developed to address those. Given the complexity of communication training, the choice of outcomes and outcome measures to assess its effectiveness is important. The aim of this paper is to 1) perform a systematic review on outcomes and outcome measures used in evaluations of communication training, 2) discuss specific challenges and 3) provide recommendations for the selection of outcomes in future studies. METHODS To identify studies and reviews reporting on the evaluation of communication training for health care professionals in oncology, we searched seven databases (Ovid MEDLINE, CENTRAL, CINAHL, EMBASE, PsychINFO, PsychARTICLES and Web of Science). We extracted outcomes assessed and the respective assessment methods. We held a two-day workshop with experts (n = 16) in communication theory, development and evaluation of generic or cancer-specific communication training and/or outcome measure development to identify and address challenges in the evaluation of communication training in oncology. After the workshop, participants contributed to the development of recommendations addressing those challenges. RESULTS Out of 2181 references, we included 96 publications (33 RCTs, 2 RCT protocols, 4 controlled trials, 36 uncontrolled studies, 21 reviews) in the review. Most frequently used outcomes were participants' training evaluation, their communication confidence, observed communication skills and patients' overall satisfaction and anxiety. Outcomes were assessed using questionnaires for participants (57.3%), patients (36.0%) and observations of real (34.7%) and simulated (30.7%) patient encounters. Outcomes and outcome measures varied widely across studies. Experts agreed that outcomes need to be precisely defined and linked with explicit learning objectives of the training. Furthermore, outcomes should be assessed as broadly as possible on different levels (health care professional, patient and interaction level). CONCLUSIONS Measuring the effects of training programmes aimed at improving health care professionals' communication skills presents considerable challenges. Outcomes as well as outcome measures differ widely across studies. We recommended to link outcome assessment to specific learning objectives and to assess outcomes as broadly as possible.
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Affiliation(s)
- F. Fischer
- Department of Psychosomatic Medicine, Center for Internal Medicine and Dermatology, Charité – Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - S. Helmer
- Institute for Social Medicine, Epidemiology and Health Economics, Charité – Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - A. Rogge
- Institute for Social Medicine, Epidemiology and Health Economics, Charité – Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - J. I. Arraras
- Radiotherapeutic Oncology Department & Medical Oncology Department, Complejo Hospitalario de Navarra, Pamplona, Spain
| | - A. Buchholz
- Department of Medical Psychology, Centre for Psychosocial Medicine, University Medical Centre, Hamburg, Germany
| | - A. Hannawa
- Center for the Advancement of Healthcare Quality and Patient Safety (CAHQS), Faculty of Communication Sciences, Università della Svizzera Italiana, Lugano, Switzerland
| | - M. Horneber
- Department of Internal Medicine, Divisions of Pneumology and Oncology/Hematology, Paracelsus Medical University, Klinikum Nuernberg, Nuernberg, Germany
| | - A. Kiss
- Department of Psychosomatic Medicine, University Hospital Basel, Basel, Switzerland
| | - M. Rose
- Department of Psychosomatic Medicine, Center for Internal Medicine and Dermatology, Charité – Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
- Department of Quantitative Health Sciences, Outcomes Measurement Science, University of Massachusetts Medical School, Worcester, USA
| | - W. Söllner
- Department of Psychosomatic Medicine and Psychotherapy, Paracelsus Medical University, Nuremberg General Hospital, Nuremberg, Germany
| | - B. Stein
- Department of Psychosomatic Medicine and Psychotherapy, Paracelsus Medical University, Nuremberg General Hospital, Nuremberg, Germany
| | - J. Weis
- Comprehensive Cancer Center, Department of Self-Help Research, Faculty of Medicine and Medical Center University of Freiburg, Freiburg, Germany
| | - P. Schofield
- Department of Psychology, Swinburne University, Melbourne, Victoria Australia
- Department of Cancer Experiences Research, Peter MacCallum Cancer Centre, Melbourne, Victoria Australia
- Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, Victoria Australia
| | - C. M. Witt
- Institute for Social Medicine, Epidemiology and Health Economics, Charité – Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
- Institute for Complementary and Integrative Medicine, University Hospital Zurich and University of Zurich, Zurich, Switzerland
- Center for Integrative Medicine, University of Maryland School of Medicine, Baltimore, MD USA
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18
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Greve F, Beirer M, Zyskowski M, Crönlein M, Müller M, Pesch S, Felix S, Biberthaler P, Buchholz A, Kirchhoff C. Prospective outcome analysis following tenodesis of the long head of the biceps tendon along with locking plate osteosynthesis for proximal humerus fractures. Injury 2019; 50:681-685. [PMID: 30770122 DOI: 10.1016/j.injury.2019.02.003] [Citation(s) in RCA: 5] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 01/29/2019] [Accepted: 02/01/2019] [Indexed: 02/02/2023]
Abstract
BACKGROUND Fractures of the proximal humerus are often associated with lesions of the long head of the biceps (LHB) tendon. This often leads to prolonged shoulder pain. Hence, many surgeons decide to perform a tenodesis of the LHB tendon simultaneous to ORIF. The purpose of this study was to evaluate the postoperative outcome after interlocking plate fixation and biceps tenodesis for treating proximal humerus fractures. METHODS 56 patients (38 females, 18 male) suffering from proximal humerus fractures who underwent surgery were retrospectively included. 26 of these 56 patients (19% Neer II, 38% Neer III, 43% Neer IV) were treated with simultaneous tenodesis of the LHB tendon when ORIF using interlocking plate fixation was performed. 30 patients (17% Neer II, 40% Neer III, 43% Neer IV) served as control group receiving only interlocking plate fixation. The patients were asked to complete the Munich Shoulder Questionnaire (MSQ) for evaluation of postoperative shoulder function. Results of the Disabilities of the Arm, Shoulder and Hand (DASH) Score and Shoulder Pain and Disability Index (SPADI) were calculated from the MSQ. Patients were clinically evaluated for a positive O'Brien test and Popeye sign. RESULTS The tenodesis group demonstrated significant superior outcome regarding the MSQ (mean 90.47 points vs. 79.41 points, p = 0.006), DASH Score (mean 4.2 points vs. 16.81 points, p = 0.017) and SPADI (mean 94.59 points vs. 83.56, p = 0.045). Flexion, external rotation and the capability of throwing a soft ball were significantly improved in the tenodesis group compared to the control group. The O'Brien test as indicator for lesions of the LHB was positive in fewer patients of the tenodesis group (2/26, vs. 21/30, p = 0.001). There was no significant difference of a positive Popeye Sign. CONCLUSION Our results show evidence of an improved shoulder function when a simultaneous tenodesis of the LHB tendon is performed during treatment of proximal humerus fractures using interlocking plate fixation.
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Affiliation(s)
- F Greve
- Klinik und Poliklinik für Unfallchirurgie, Klinikum rechts der Isar, Technische Universität München, Germany
| | - M Beirer
- Klinik und Poliklinik für Unfallchirurgie, Klinikum rechts der Isar, Technische Universität München, Germany
| | - M Zyskowski
- Klinik und Poliklinik für Unfallchirurgie, Klinikum rechts der Isar, Technische Universität München, Germany
| | - M Crönlein
- Klinik und Poliklinik für Unfallchirurgie, Klinikum rechts der Isar, Technische Universität München, Germany
| | - M Müller
- Klinik und Poliklinik für Unfallchirurgie, Klinikum rechts der Isar, Technische Universität München, Germany
| | - S Pesch
- Klinik und Poliklinik für Unfallchirurgie, Klinikum rechts der Isar, Technische Universität München, Germany
| | - S Felix
- Klinik und Poliklinik für Unfallchirurgie, Klinikum rechts der Isar, Technische Universität München, Germany
| | - P Biberthaler
- Klinik und Poliklinik für Unfallchirurgie, Klinikum rechts der Isar, Technische Universität München, Germany
| | - A Buchholz
- Klinik und Poliklinik für Unfallchirurgie, Klinikum rechts der Isar, Technische Universität München, Germany
| | - C Kirchhoff
- Klinik und Poliklinik für Unfallchirurgie, Klinikum rechts der Isar, Technische Universität München, Germany.
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19
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Buchholz A, Hendrickson M, Giroux I, Vedrenne F, Hanning R, Eisenbraun C, Lieffers J, Lovestam E. Use of Simulation in Learning the Nutrition Care Process in Canada. J Acad Nutr Diet 2018. [DOI: 10.1016/j.jand.2018.06.184] [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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20
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Buchholz A, Vanderleest K, MacMartin C, Prescod A, Wilson A. Simulated Patients Enhance Nutrition Students’/Interns’ Practice Competence. J Acad Nutr Diet 2018. [DOI: 10.1016/j.jand.2018.06.183] [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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21
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Baensch D, Bonnemeier H, Brandt J, Bode F, Svendsen JH, Belke R, Buchholz A, Suling A, Wegscheider K. P442Patient selection and clinical characteristics for single chamber ICD with additional atrial sensing capabilities: a subgroup analysis of the randomised controlled NORDIC ICD trial. Europace 2018. [DOI: 10.1093/europace/euy015.252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
| | - H Bonnemeier
- University Medical Center of Schleswig-Holstein, Campus Kiel, Department of Internal Medicine III Cardiology and Angiology, Kiel, Germany
| | - J Brandt
- Skane University Hospital, Thoracic Surgery, Lund, Sweden
| | - F Bode
- Sana Clinic Ostholstein, Center for Internal and Intensive Care Medicine, Oldenburg, Germany
| | - J H Svendsen
- Rigshospitalet - Copenhagen University Hospital, Department of Cardiology, Copenhagen, Denmark
| | | | - A Buchholz
- University Medical Center Hamburg Eppendorf, Department of Medical Biometry and Epidemiology, Hamburg, Germany
| | - A Suling
- University Medical Center Hamburg Eppendorf, Department of Medical Biometry and Epidemiology, Hamburg, Germany
| | - K Wegscheider
- University Medical Center Hamburg Eppendorf, Department of Medical Biometry and Epidemiology, Hamburg, Germany
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22
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Müller E, Diesing A, Härter M, Scholl I, Buchholz A. Wirksamkeit eines Trainings in patientenzentrierter Kommunikation und partizipativer Entscheidungsfindung für pneumologisch tätige Ärzte. Pneumologie 2018. [DOI: 10.1055/s-0037-1619414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- E Müller
- Institut und Poliklinik für Medizinische Psychologie, Universitätsklinikum Hamburg-Eppendorf
| | - A Diesing
- Institut und Poliklinik für Medizinische Psychologie, Universitätsklinikum Hamburg-Eppendorf
| | - M Härter
- Institut und Poliklinik für Medizinische Psychologie, Universitätsklinikum Hamburg-Eppendorf
| | - I Scholl
- Institut und Poliklinik für Medizinische Psychologie, Universitätsklinikum Hamburg-Eppendorf
| | - A Buchholz
- Institut und Poliklinik für Medizinische Psychologie, Universitätsklinikum Hamburg-Eppendorf
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23
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Oldenburg O, Wellmann B, Buchholz A, Bitter T, Fox H, Freiwald E, Horstkotte D, Wegscheider K. 5116Effects of adaptive servoventilation to treat central sleep apnea in heart failure patients with reduced ejection fraction on exercise capacity and mortality: the Bad Oeynhausen ASV Registry. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.5116] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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24
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Zhao DF, Buchholz A, Tillmann R, Kleist E, Wu C, Rubach F, Kiendler-Scharr A, Rudich Y, Wildt J, Mentel TF. Environmental conditions regulate the impact of plants on cloud formation. Nat Commun 2017; 8:14067. [PMID: 28218253 PMCID: PMC5321720 DOI: 10.1038/ncomms14067] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Accepted: 11/25/2016] [Indexed: 11/15/2022] Open
Abstract
The terrestrial vegetation emits large amounts of volatile organic compounds (VOC) into the atmosphere, which on oxidation produce secondary organic aerosol (SOA). By acting as cloud condensation nuclei (CCN), SOA influences cloud formation and climate. In a warming climate, changes in environmental factors can cause stresses to plants, inducing changes of the emitted VOC. These can modify particle size and composition. Here we report how induced emissions eventually affect CCN activity of SOA, a key parameter in cloud formation. For boreal forest tree species, insect infestation by aphids causes additional VOC emissions which modifies SOA composition thus hygroscopicity and CCN activity. Moderate heat increases the total amount of constitutive VOC, which has a minor effect on hygroscopicity, but affects CCN activity by increasing the particles' size. The coupling of plant stresses, VOC composition and CCN activity points to an important impact of induced plant emissions on cloud formation and climate. Volatile organic compounds (VOC) emitted by vegetation influence cloud formation, yet the impact of environmental stresses remains little known. Here, manipulation experiments reveal insect infestation and heat stress are linked to induced VOC and constitutive VOC emissions shifts, respectively.
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Affiliation(s)
- D F Zhao
- Institute for Energy and Climate Research, IEK-8: Troposphere, Forschungszentrum Jülich, Jülich 52425, Germany
| | - A Buchholz
- Institute for Energy and Climate Research, IEK-8: Troposphere, Forschungszentrum Jülich, Jülich 52425, Germany
| | - R Tillmann
- Institute for Energy and Climate Research, IEK-8: Troposphere, Forschungszentrum Jülich, Jülich 52425, Germany
| | - E Kleist
- Institute of Bio- and Geosciences, IBG-2, Forschungszentrum Jülich, Jülich 52425, Germany
| | - C Wu
- Institute for Energy and Climate Research, IEK-8: Troposphere, Forschungszentrum Jülich, Jülich 52425, Germany
| | - F Rubach
- Institute for Energy and Climate Research, IEK-8: Troposphere, Forschungszentrum Jülich, Jülich 52425, Germany
| | - A Kiendler-Scharr
- Institute for Energy and Climate Research, IEK-8: Troposphere, Forschungszentrum Jülich, Jülich 52425, Germany
| | - Y Rudich
- Department of Earth and Planetary Sciences, Weizmann Institute of Science, Rehovot 76100, Israel
| | - J Wildt
- Institute for Energy and Climate Research, IEK-8: Troposphere, Forschungszentrum Jülich, Jülich 52425, Germany.,Institute of Bio- and Geosciences, IBG-2, Forschungszentrum Jülich, Jülich 52425, Germany
| | - Th F Mentel
- Institute for Energy and Climate Research, IEK-8: Troposphere, Forschungszentrum Jülich, Jülich 52425, Germany
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25
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Sandmann GH, Crönlein M, Neumaier M, Beirer M, Buchholz A, Stöckle U, Biberthaler P, Siebenlist S. Reduction and stabilization of radial neck fractures by intramedullary pinning: a technique not only for children. Eur J Med Res 2016; 21:15. [PMID: 27072673 PMCID: PMC4830037 DOI: 10.1186/s40001-016-0210-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [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] [Received: 01/12/2016] [Accepted: 04/04/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Isolated radial neck fractures occur only in rare cases. The majority of cases are non-displaced or minimally displaced and can be treated conservatively. Conservative treatment, however, might result in secondary displacement and/or malunion. On the other hand, open reduction and internal fixation (ORIF) as standard surgical approach in adults is associated with non-union, implant-related complications and reduced range of motion. For isolated radial neck fractures with an intact radial head, the procedure of centromedullary pinning--as widely used in the treatment of paediatric radial neck fractures--might be an alternative operative technique in adults as well. The purpose of this retrospective case series therefore was to evaluate the functional outcome of radial neck fractures treated by intramedullary pinning. METHODS Between 02/2009 and 12/2014, a total of eight patients with isolated radial neck fractures (Mason type-III; Judet Type II and III) were treated with centromedullary pinning using titanium elastic nails (TEN). The mean age of the patients was 39 years (range 23-90 years) with a mean interval from injury to surgery of 2.9 days (range 1-7 days). Subjective and objective criteria included patient's satisfaction, pain rating on a visual analogue scale (VAS) and active range of motion (ROM) compared to the contralateral armside. Functional scoring included the Morrey Elbow Score (MEPS), the QuickDASH and the Elbow Self Assessment Score (ESAS). Furthermore, follow-up radiographs were evaluated. RESULTS Seven of the eight patients were available for follow-up after a mean of 36 months (range 6-64 months). Patients' satisfaction was rated very good in four cases, good in two cases and sufficient in one case. An unrestricted active ROM compared to the contralateral side for extension-flexion arc and for pronation-supination-arc with full strength was rated in all cases. The Elbow Self Assessment Score was 98.52 ± 1.95 (range 96-100), the calculated Mayo elbow performance score was 95.71 ± 7.32 (range 85-100) and the QuickDASH score was 6.81 ± 10.42 (range 0-27). There were no complications as infection, non-union, heterotopic ossifications or secondary loss of reduction of the radial head. Only one patient complained about pain resulting from an affection of the superficial radial nerve. CONCLUSION In the present cohort, good to excellent results without relevant complications were seen. The technique of intramedullary pinning as described in the treatment of isolated radial neck fractures in children represents a suitable and reliable method in adults as well. In selected cases, this technique can be recommended as an alternative, minimal-invasive approach to the radial head plate osteosynthesis.
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Affiliation(s)
- G H Sandmann
- Department of Trauma Surgery, Klinikum Rechts Der Isar, Technische Universität München, Ismaninger Strasse 22, 81675, Munich, Germany.,BG Unfallklinik Tübingen, Eberhard-Karls- University, Tuebingen, Germany
| | - M Crönlein
- Department of Trauma Surgery, Klinikum Rechts Der Isar, Technische Universität München, Ismaninger Strasse 22, 81675, Munich, Germany.
| | - M Neumaier
- Department of Trauma Surgery, Klinikum Rechts Der Isar, Technische Universität München, Ismaninger Strasse 22, 81675, Munich, Germany
| | - M Beirer
- Department of Trauma Surgery, Klinikum Rechts Der Isar, Technische Universität München, Ismaninger Strasse 22, 81675, Munich, Germany
| | - A Buchholz
- Department of Trauma Surgery, Klinikum Rechts Der Isar, Technische Universität München, Ismaninger Strasse 22, 81675, Munich, Germany
| | - U Stöckle
- BG Unfallklinik Tübingen, Eberhard-Karls- University, Tuebingen, Germany
| | - P Biberthaler
- Department of Trauma Surgery, Klinikum Rechts Der Isar, Technische Universität München, Ismaninger Strasse 22, 81675, Munich, Germany
| | - S Siebenlist
- Department of Trauma Surgery, Klinikum Rechts Der Isar, Technische Universität München, Ismaninger Strasse 22, 81675, Munich, Germany.,Department of Orthopaedic Sports Medicine, Klinikum Rechts Der Isar, Technische Universität München, Munich, Germany
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26
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Spies M, Brütt A, Freitag M, Buchholz A. Anwendung der Internationalen Klassifikation der Funktionsfähigkeit, Behinderung und Gesundheit (ICF) in der psychosomatischen Rehabilitation und Suchtrehabilitation in Deutschland – eine Bestandsaufnahme. REHABILITATION 2015; 54:297-303. [DOI: 10.1055/s-0035-1555908] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- M. Spies
- Institut und Poliklinik für Medizinische Psychologie, Universitätsklinikum Hamburg-Eppendorf
| | - A. Brütt
- Institut und Poliklinik für Medizinische Psychologie, Universitätsklinikum Hamburg-Eppendorf
| | - M. Freitag
- Institut und Poliklinik für Medizinische Psychologie, Universitätsklinikum Hamburg-Eppendorf
| | - A. Buchholz
- Institut und Poliklinik für Medizinische Psychologie, Universitätsklinikum Hamburg-Eppendorf
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27
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Bartsch AL, Buchholz A, Härter M, Brütt AL. Barrieren für die Teilnahme an der Studie ENTER: Evaluation einer Intervention zur kooperativen Raucherentwöhnung – eine Befragung unter Hausärzten. Suchttherapie 2015. [DOI: 10.1055/s-0035-1557709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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28
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Buchholz A, Kahl B, Piontek D, Friedrichs A, Röhrig J, Rist F, Berner M, Kraus L. Adaption und empirische Prüfung einer Zuweisungsleitlinie für die Weiterbehandlung nach dem qualifizierten Alkoholentzug: Studiendesign und Ergebnisse zur Machbarkeit. Suchttherapie 2015. [DOI: 10.1055/s-0035-1557507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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29
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Hill SK, Buchholz A, Amsbaugh H, Reilly JL, Rubin LH, Gold JM, Keefe RS, Pearlson GD, Keshavan MS, Tamminga CA, Sweeney JA. Working memory impairment in probands with schizoaffective disorder and first degree relatives of schizophrenia probands extend beyond deficits predicted by generalized neuropsychological impairment. Schizophr Res 2015; 166:310-5. [PMID: 26008884 PMCID: PMC5226656 DOI: 10.1016/j.schres.2015.05.018] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [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: 03/10/2015] [Revised: 05/04/2015] [Accepted: 05/07/2015] [Indexed: 12/13/2022]
Abstract
OBJECTIVE Working memory impairment is well established in psychotic disorders. However, the relative magnitude, diagnostic specificity, familiality pattern, and degree of independence from generalized cognitive deficits across psychotic disorders remain unclear. METHOD Participants from the Bipolar and Schizophrenia Network on Intermediate Phenotypes (B-SNIP) study included probands with schizophrenia (N=289), psychotic bipolar disorder (N=227), schizoaffective disorder (N=165), their first-degree relatives (N=315, N=259, N=193, respectively), and healthy controls (N=289). All were administered the WMS-III Spatial Span working memory test and the Brief Assessment of Cognition in Schizophrenia (BACS) battery. RESULTS All proband groups displayed significant deficits for both forward and backward span compared to controls. However, after covarying for generalized cognitive impairments (BACS composite), all proband groups showed a 74% or greater effect size reduction with only schizoaffective probands showing residual backward span deficits compared to controls. Significant familiality was seen in schizophrenia and bipolar pedigrees. In relatives, both forward and backward span deficits were again attenuated after covarying BACS scores and residual backward span deficits were seen in relatives of schizophrenia patients. CONCLUSIONS Overall, both probands and relatives showed a similar pattern of robust working memory deficits that were largely attenuated when controlling for generalized cognitive deficits.
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Affiliation(s)
- S. Kristian Hill
- Department of Psychology, Rosalind Franklin University of Medicine and Science, North Chicago, IL,Corresponding author at: Rosalind Franklin University of Medicine and Science, Department of Psychology, 3333 Green Bay Rd., North Chicago, IL 60064, Phone: (847) 578-8748,
| | - Alison Buchholz
- Department of Psychology, Rosalind Franklin University of Medicine and Science, North Chicago, IL
| | - Hayley Amsbaugh
- Department of Psychology, Rosalind Franklin University of Medicine and Science, North Chicago, IL
| | - James L. Reilly
- Department of Psychiatry and Behavioral Sciences, Northwestern University, Chicago, IL
| | - Leah H. Rubin
- Department of Psychiatry, University of Illinois at Chicago, Chicago, IL
| | - James M. Gold
- Maryland Psychiatric Research Center, University of Maryland, Baltimore, MD
| | | | - Godfrey D. Pearlson
- Department of Psychiatry and Neurobiology, Yale University and Olin Neuropsychiatric Research Center, Hartford, CT
| | | | - Carol A. Tamminga
- Department of Psychiatry, University of Texas Southwestern, Dallas, TX
| | - John A. Sweeney
- Department of Psychiatry, University of Texas Southwestern, Dallas, TX
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30
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Buchholz A, Spies M, Brütt AL. [ICF-based Assessments to Evaluate Need and Success in the Treatment of Patients With Mental Disorders - A Systematic Review]. REHABILITATION 2015; 54:153-9. [PMID: 26091492 DOI: 10.1055/s-0035-1548897] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
AIMS The aim of the study is to provide a systematic overview of assessment instruments that refer conceptually to the International Classification of Functioning, Disability, and Health (ICF) and can be used in the context of mental disorders. METHODS We conducted a systematic literature search in the scientific databases (EMBASE, Medline, PsycInfo, PSYNDEX) and screened relevant conference proceedings since 2001. From abstracts fitting our inclusion criteria we reviewed full texts. Identified assessments were compared regarding their operationalization of the ICF. RESULTS Out of 440 identified abstracts we selected 8 assessment instruments for interviewer-, proxy- or self-assessment. Two were generic and six disease-specific scales. Differences pertain to the extent as well as coverage and operationalization of the ICF. CONCLUSION Existing instruments differ in psychometric properties and operationalization of the ICF. This review might help clinicians to select ICF-based assessments.
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Affiliation(s)
- A Buchholz
- Institut und Poliklinik für Medizinische Psychologie, Universitätsklinikum Hamburg-Eppendorf
| | - M Spies
- Institut und Poliklinik für Medizinische Psychologie, Universitätsklinikum Hamburg-Eppendorf
| | - A L Brütt
- Institut und Poliklinik für Medizinische Psychologie, Universitätsklinikum Hamburg-Eppendorf
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31
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Dittrich S, Tuerk M, Haaker G, Greim V, Buchholz A, Burkhardt B, Fujak A, Trollmann R, Schmid A, Schroeder R. Cardiomyopathy in Duchenne Muscular Dystrophy: Current Value of Clinical, Electrophysiological and Imaging Findings in Children and Teenagers. Klin Padiatr 2015; 227:225-31. [PMID: 26058601 DOI: 10.1055/s-0034-1398689] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
BACKGROUND Progressive cardiomyopathy (CMP) is one main cause of death in DMD. This cross-sectional assessment of different cardiac diagnostic procedures focusses on preterm diagnosis of cardiac dysfunction. PATIENTS 39 male DMD patients aged 6-20 years were included. 6 patients were still ambulatory, 21 patients received corticosteroid therapy. METHODS All patients were investigated by ECG, Holter ECG and heart rate variability (HRV), B-type natriuretic peptide (BNP), echocardiography (TTE), tissue Doppler Imaging (TD) and magnetic resonance imaging (MRI) with Late Gadolinium enhancement (LE) and segmental wall motion analysis (WMA). RESULTS 56% of the patients showed repolarization abnormalities and 76% altered HRV. Subnormal ventricular function was found in 25% by TTE and in 34% by MRI. TD differed from normal controls only in the apical septum. In MRI 89% of the patients showed different distribution and intensity of LE and WM restriction. The extent of LE was less in patients after steroid treatment (p<0.05). DISCUSSION MRI with segmental LE- and WM-analysis seems to be superior to TTE and TD in exploring regional distribution and severity of damage of the myocardium. ECG and HRV abnormalities are common in DMD-patients but not tightly predictive for segmental and global left ventricular dysfunction. Targeted treatment of CMP in DMD needs prospective evaluation. CONCLUSION A timely cardiac MRI is the most sensitive investigation for the identification of early myocardial changes in DMD which is a prerequisite for early interventions and therapeutic strategies.
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Affiliation(s)
- S Dittrich
- Pediatric Cardiology, University Hospital, Erlangen, Germany
| | - M Tuerk
- Neurology, University Hospital, Erlangen, Germany
| | - G Haaker
- Neuropathology, University Hospital, Erlangen, Germany
| | - V Greim
- Pediatric Cardiology, University Hospital, Erlangen, Germany
| | - A Buchholz
- Clinical Trials Unit, University of Freiburg, Freiburg, Germany
| | - B Burkhardt
- Pediatric Cardiology, University Medical Center, Freiburg, Germany
| | - A Fujak
- Orthopedics, University Hospital, Erlangen, Germany
| | - R Trollmann
- Pediatrics, University Hospital, Erlangen, Germany
| | - A Schmid
- Radiology, University Hospital, Erlangen, Germany
| | - R Schroeder
- Neurology, University Hospital, Erlangen, Germany
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Friedrichs A, Kraus L, Berner M, Schippers G, Broekman T, Rist F, Piontek D, Röhrig J, Buchholz A. Adaption einer niederländischen Zuweisungsleitlinie für Patienten nach qualifiziertem Alkoholentzug – Ergebnisse einer Delphi-Befragung. Suchttherapie 2013. [DOI: 10.1055/s-0033-1354394] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- A. Friedrichs
- Institut und Poliklinik für Medizinische Psychologie, Universitätsklinikum Hamburg-Eppendorf
| | - L. Kraus
- IFT Institut für Therapieforschung, München
| | - M. Berner
- Abteilung für Psychiatrie und Psychotherapie, Universitätsklinikum Freiburg
| | - G. Schippers
- Academic Medical Center, Amsterdam Institute for Addiction Research (AIAR), Amsterdam, The Netherlands
| | | | - F. Rist
- Institut für Klinische Psychologie, Westfälische Wilhelms-Universität Münster
| | - D. Piontek
- IFT Institut für Therapieforschung, München
| | - J. Röhrig
- Abteilung für Psychiatrie und Psychotherapie, Universitätsklinikum Freiburg
| | - A. Buchholz
- Institut und Poliklinik für Medizinische Psychologie, Universitätsklinikum Hamburg-Eppendorf
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Buchholz A, Rosch I, Wolf R. Fallgruppen mit unterschiedlichem Risikoprofil im Maßregelvollzug §64 und ihr potentieller Nutzen für die Behandlungsplanung. Suchttherapie 2013. [DOI: 10.1055/s-0033-1351605] [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] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Schröder M, Buchholz A, Schmidt W, Brandt C, Schmitz KP. Quasi-Continuous Particle Size Characterisation During Accelerated Stent Radial Fatigue Test. BIOMED ENG-BIOMED TE 2013; 58 Suppl 1:/j/bmte.2013.58.issue-s1-C/bmt-2013-4094/bmt-2013-4094.xml. [DOI: 10.1515/bmt-2013-4094] [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: 11/15/2022]
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Fayolle G, Levick W, Lajiness-O'Neill R, Fastenau P, Briskin S, Bass N, Silva M, Critchfield E, Nakase-Richardson R, Hertza J, Loughan A, Perna R, Northington S, Boyd S, Anderson A, Peery S, Chafetz M, Maris M, Ramezani A, Sylvester C, Goldberg K, Constantinou M, Karekla M, Hall J, Edwards M, Balldin V, Strutt A, Pavlik V, Marquez de la Plata C, Cullum M, lacritz L, Reisch J, Massman P, Royall D, Barber R, Younes S, Wiechmann A, O'Bryant S, Patel K, Suhr J, Patel K, Suhr J, Chari S, Yokoyama J, Bettcher B, Karydas A, Miller B, Kramer J, Zec R, Fritz S, Kohlrus S, Robbs R, Ala T, Gifford K, Cantwell N, Romano R, Jefferson A, Holland A, Newton S, Bunting J, Coe M, Carmona J, Harrison D, Puente A, Terry D, Faraco C, Brown C, Patel A, Watts A, Kent A, Siegel J, Miller S, Ernst W, Chelune G, Holdnack J, Sheehan J, Duff K, Pedraza O, Crawford J, Terry D, Puente A, Brown C, Faraco C, Watts A, Patel A, Kent A, Siegel J, Miller L, Younes S, Hobson Balldin V, Benavides H, Johnson L, Hall J, Tshuma L, O'Bryant S, Dezhkam N, Hayes L, Love C, Stephens B, Webbe F, Allen C, Lemann E, Davis A, Pierson E, Lutz J, Piehl J, Holler K, Kavanaugh B, Tayim F, Llanes S, Mulligan K, Poston K, Riccio C, Beathard J, Cohen M, Stolberg P, Hart J, Jones W, Mayfield J, Allen D, Weller J, Dunham K, Demireva P, McInerney K, Suhr J, Dykstra J, Riddle T, Suhr J, Primus M, Riccio C, Highsmith J, Everhart D, Shadi S, Lehockey K, Sullivan S, Lucas M, Mandava S, Murphy B, Donovick P, Lalwani L, Rosselli M, Coad S, Carrasco R, Sofko C, Scarisbrick D, Golden C, Coad S, Zuckerman S, Golden C, Perna R, Loughan A, Hertza J, Brand J, Rivera Mindt M, Denney R, Schaffer S, Alper K, Devinsky O, Barr W, Langer K, Fraiman J, Scagliola J, Roman E, Martinez A, Cohen M, Dunham K, Riccio C, Martin P, Robbins J, Golden C, Axelrod B, Etherton J, Konopacki K, Moses J, Juliano A, Whiteside D, Rolin S, Widmann G, Franzwa M, Sokal B, Mark V, Doyle K, Morgan E, Weber E, Bondi M, Delano-Wood L, Grant I, Sibson J, Woods S, Andrews P, McGregor S, Golden C, Etherton J, Allen C, Cormier R, Cumley N, Elek M, Green M, Ogbeide S, Kruger A, Pacheco L, Robinson G, Welch H, Etherton J, Allen C, Cormier R, Cumley N, Kruger A, Pacheco L, Glover M, Parriott D, Jones W, Loe S, Hughes L, Natta L, Moses J, Vincent A, Roebuck-Spencer T, Bryan C, Padua M, Denney R, Moses J, Quenicka W, McGoldirck K, Bennett T, Soper H, Collier S, Connolly M, Hanratty A, Di Pinto M, Magnuson S, Dunham K, Handel E, Davidson K, Livers E, Frantz S, Allen J, Jerard T, Moses J, Pierce S, Sakhai S, Newton S, Warchol A, Holland A, Bunting J, Coe M, Carmona J, Harrison D, Barney S, Thaler N, Sutton G, Strauss G, Allen D, Hunter B, Bennett T, Quenicka W, McGoldrick K, Soper H, Sordahl J, Torrence N, John S, Gavett B, O'Bryant S, Shadi S, Denney R, Nichols C, Riccio C, Cohen M, Dennison A, Wasserman T, Schleicher-Dilks S, Adler M, Golden C, Olivier T, Schleicher-Dilks S, Golden C, LeMonda B, McGinley J, Pritchett A, Chang L, Cloak C, Cunningham E, Lohaugen G, Skranes J, Ernst T, Parke E, Thaler N, Etcoff L, Allen D, Andrews P, McGregor S, Golden C, Northington S, Daniels R, Loughan A, Perna R, Hertza J, Hochsztein N, Miles-Mason E, Granader Y, Vasserman M, MacAllister W, Casto B, Peery S, Patrick K, Hurewitz F, Chute D, Booth A, Koch C, Roid G, Balkema N, Kiefel J, Bell L, Maerlender A, Belkin T, Katzenstein J, Semerjian C, Culotta V, Band E, Yosick R, Burns T, Arenivas A, Bearden D, Olson K, Jacobson K, Ubogy S, Sterling C, Taub E, Griffin A, Rickards T, Uswatte G, Davis D, Sweeney K, Llorente A, Boettcher A, Hill B, Ploetz D, Kline J, Rohling M, O'Jile J, Holler K, Petrauskas V, Long J, Casey J, Long J, Petrauskas V, Duda T, Hodsman S, Casey J, Stricker S, Martner S, Hansen R, Ferraro F, Tangen R, Hanratty A, Tanabe M, O'Callaghan E, Houskamp B, McDonald L, Pick L, Guardino D, Pick L, Pietz T, Kayser K, Gray R, Letteri A, Crisologo A, Witkin G, Sanders J, Mrazik M, Harley A, Phoong M, Melville T, La D, Gomez R, Berthelson L, Robbins J, Lane E, Golden C, Rahman P, Konopka L, Fasfous A, Zink D, Peralta-Ramirez N, Perez-Garcia M, Puente A, Su S, Lin G, Kiely T, Gomez R, Schatzberg A, Keller J, Dykstra J, Suhr J, Feigon M, Renteria L, Fong M, Piper L, Lee E, Vordenberg J, Contardo C, Magnuson S, Doninger N, Luton L, Balkema N, Drane D, Phelan A, Stricker W, Poreh A, Wolkenberg F, Spira J, Lin G, Su S, Kiely T, Gomez R, Schatzberg A, Keller J, DeRight J, Jorgensen R, Fitzpatrick L, Crowe S, Woods S, Doyle K, Weber E, Cameron M, Cattie J, Cushman C, Grant I, Blackstone K, Woods S, Weber E, Grant I, Moore D, Roberg B, Somogie M, Thelen J, Lovelace C, Bruce J, Gerstenecker A, Mast B, Litvan I, Hargrave D, Schroeder R, Buddin W, Baade L, Heinrichs R, Thelen J, Roberg B, Somogie M, Lovelace C, Bruce J, Boseck J, Berry K, Koehn E, Davis A, Meyer B, Gelder B, Sussman Z, Espe-Pfeifer P, Musso M, Barker A, Jones G, Gouvier W, Weber E, Woods S, Grant I, Johnson V, Zaytsev L, Freier-Randall M, Sutton G, Thaler N, Ringdahl E, Allen D, Olsen J, Byrd D, Rivera-Mindt M, Fellows R, Morgello S, Wheaton V, Jaehnert S, Ellis C, Olavarria H, Loftis J, Huckans M, Pimental P, Frawley J, Welch M, Jennette K, Rinehardt E, Schoenberg M, Strober L, Genova H, Wylie G, DeLuca J, Chiaravalloti N, Hertza J, Loughan A, Perna R, Northington S, Boyd S, Hertza J, Loughan A, Perna R, Northington S, Boyd S, Ibrahim E, Seiam A, Ibrahim E, Bohlega S, Rinehardt E, Lloyd H, Goldberg M, Marceaux J, Fallows R, McCoy K, Yehyawi N, Luther E, Hilsabeck R, Fulton R, Stevens P, Erickson S, Dodzik P, Williams R, Dsurney J, Najafizadeh L, McGovern J, Chowdhry F, Acevedo A, Bakhtiar A, Karamzadeh N, Amyot F, Gandjbakhche A, Haddad M, Taub E, Johnson M, Wade J, Harper L, Rickards T, Sterling C, Barghi A, Uswatte G, Mark V, Balkema N, Christopher G, Marcus D, Spady M, Bloom J, Wiechmann A, Hall J, Loughan A, Perna R, Hertza J, Northington S, Zimmer A, Webbe F, Miller M, Schuster D, Ebner H, Mortimer B, Webbe F, Palmer G, Happe M, Paxson J, Jurek B, Graca J, Meyers J, Lange R, Brickell T, French L, Lange R, Iverson G, Shewchuk J, Madler B, Heran M, Brubacher J, Brickell T, Lange R, Ivins B, French L, Baldassarre M, Paper T, Herrold A, Chin A, Zgaljardic D, Oden K, Lambert M, Dickson S, Miller R, Plenger P, Jacobson K, Olson K, Sutherland E, Glatts C, Schatz P, Walker K, Philip N, McClaughlin S, Mooney S, Seats E, Carnell V, Raintree J, Brown D, Hodges C, Amerson E, Kennedy C, Moore J, Schatz P, Ferris C, Roebuck-Spencer T, Vincent A, Bryan C, Catalano D, Warren A, Monden K, Driver S, Chau P, Seegmiller R, Baker M, Malach S, Mintz J, Villarreal R, Peterson A, Leininger S, Strong C, Donders J, Merritt V, Vargas G, Rabinowitz A, Arnett P, Whipple E, Schultheis M, Robinson K, Iacovone D, Biester R, Alfano D, Nicholls M, Vargas G, Rabinowitz A, Arnett P, Rabinowitz A, Vargas G, Arnett P, Klas P, Jeffay E, Zakzanis K, Vandermeer M, Jeffay E, Zakzanis K, Womble M, Rohling M, Hill B, Corley E, Considine C, Fichtenberg N, Harrison J, Pollock M, Mouanoutoua A, Brimager A, Lebby P, Sullivan K, Edmed S, Silva M, Nakase-Richardson R, Critchfield E, Kieffer K, McCarthy M, Wiegand L, Lindsey H, Hernandez M, Puente A, Noniyeva Y, Lapis Y, Padua M, Poole J, Brooks B, McKay C, Mrazik M, Meeuwisse W, Emery C, Brooks B, Mazur-Mosiewicz A, Sherman E, Brooks B, Mazur-Mosiewicz A, Kirkwood M, Sherman E, Gunner J, Miele A, Silk-Eglit G, Lynch J, McCaffrey R, Stewart J, Tsou J, Scarisbrick D, Chan R, Bure-Reyes A, Cortes L, Gindy S, Golden C, Hunter B, Biddle C, Shah D, Jaberg P, Moss R, Horner M, VanKirk K, Dismuke C, Turner T, Muzzy W, Dunnam M, Miele A, Warner G, Donnelly K, Donnelly J, Kittleson J, Bradshaw C, Alt M, Margolis S, Ostroy E, Rolin S, Higgins K, Denney R, Rolin S, Eng K, Biddle C, Akeson S, Wall J, Davis J, Hansel J, Hill B, Rohling M, Wang B, Womble M, Gervais R, Greiffenstein M, Denning J, Denning J, Schroeder R, Buddin W, Hargrave D, VonDran E, Campbell E, Brockman C, Heinrichs R, Baade L, Buddin W, Hargrave D, Schroeder R, Teichner G, Waid R, Buddin W, Schroeder R, Teichner G, Waid R, Buican B, Armistead-Jehle P, Bailie J, Dilay A, Cottingham M, Boyd C, Asmussen S, Neff J, Schalk S, Jensen L, DenBoer J, Hall S, DenBoer J, Schalk S, Jensen L, Hall S, Miele A, Lynch J, McCaffrey R, Holcomb E, Axelrod B, Demakis G, Rimland C, Ward J, Ross M, Bailey M, Stubblefield A, Smigielski J, Geske J, Karpyak V, Reese C, Larrabee G, Suhr J, Silk-Eglit G, Gunner J, Miele A, Lynch J, McCaffrey R, Allen L, Celinski M, Gilman J, Davis J, Wall J, LaDuke C, DeMatteo D, Heilbrun K, Swirsky-Sacchetti T, Lindsey H, Puente A, Dedman A, Withers K, Chafetz M, Deneen T, Denney R, Fisher J, Spray B, Savage R, Wiener H, Tyer J, Ningaonkar V, Devlin B, Go R, Sharma V, Tsou J, Golden C, Fontanetta R, Calderon C, Coad S, Golden C, Calderon C, Fontaneta R, Coad S, Golden C, Ringdahl E, Thaler N, Sutton G, Vertinski M, Allen D, Verbiest R, Thaler N, Snyder J, Kinney J, Allen D, Rach A, Young J, Crouse E, Schretlen D, Weaver J, Buchholz A, Gordon B, Macciocchi S, Seel R, Godsall R, Brotsky J, DiRocco A, Houghton-Faryna E, Bolinger E, Hollenbeck C, Hart J, Thaler N, Vertinski M, Ringdahl E, Allen D, Lee B, Strauss G, Adams J, Martins D, Catalano L, Waltz J, Gold J, Haas G, Brown L, Luther J, Goldstein G, Kiely T, Kelley E, Lin G, Su S, Raba C, Gomez R, Trettin L, Solvason H, Schatzberg A, Keller J, Vertinski M, Thaler N, Allen D, Gold J, Buchanan R, Strauss G, Baldock D, Ringdahl E, Sutton G, Thaler N, Allen D, Fallows R, Marceaux J, McCoy K, Yehyawi N, Luther E, Hilsabeck R, Etherton J, Phelps T, Richmond S, Tapscott B, Thomlinson S, Cordeiro L, Wilkening G, Parikh M, Graham L, Grosch M, Hynan L, Weiner M, Cullum C, Hobson Balldin V, Menon C, Younes S, Hall J, Strutt A, Pavlik V, Marquez de la Plata C, Cullum M, Lacritz L, Reisch J, Massman P, Royall D, Barber R, O'Bryant S, Castro-Couch M, Irani F, Houshyarnejad A, Norman M, Peery S, Fonseca F, Bure-Reyes A, Browne B, Alvarez J, Jiminez Y, Baez V, Cortes L, Golden C, Fonseca F, Bure-Reyes A, Coad S, Alvarez J, Browne B, Baez V, Golden C, Resendiz C, Scott B, Farias G, York M, Lozano V, Mahoney M, Strutt A, Hernandez Mejia M, Puente A, Bure-Reyes A, Fonseca F, Baez V, Alvarez J, Browne B, Coad S, Jiminez Y, Cortes L, Golden C, Bure-Reyes A, Pacheco E, Homs A, Acevedo A, Ownby R, Nici J, Hom J, Lutz J, Dean R, Finch H, Pierce S, Moses J, Mann S, Feinberg J, Choi A, Kaminetskaya M, Pierce C, Zacharewicz M, Axelrod B, Gavett B, Horwitz J, Edwards M, O'Bryant S, Ory J, Gouvier W, Carbuccia K, Ory J, Carbuccia K, Gouvier W, Morra L, Garcon S, Lucas M, Donovick P, Whearty K, Campbell K, Camlic S, Donovick P, Edwards M, Balldin V, Hall J, Strutt A, Pavlik V, Marquez de la Plata C, Cullum C, Lacritz L, Reisch J, Massman P, Barber R, Royall D, Younes S, O'Bryant S, Brinckman D, Schultheis M, Ehrhart L, Weisser V, Medaglia J, Merzagora A, Reckess G, Ho T, Testa S, Gordon B, Schretlen D, Woolery H, Farcello C, Klimas N, Thaler N, Allen D, Meyer J, Vargas G, Rabinowitz A, Barwick F, Arnett P, Womble M, Rohling M, Hill B, Corley E, Drayer K, Rohling M, Ploetz D, Womble M, Hill B, Baldock D, Ringdahl E, Sutton G, Thaler N, Allen D, Galusha J, Schmitt A, Livingston R, Stewart R, Quarles L, Pagitt M, Barke C, Baker A, Baker N, Cook N, Ahern D, Correia S, Resnik L, Barnabe K, Gnepp D, Benjamin M, Zlatar Z, Garcia A, Harnish S, Crosson B, Rickards T, Mark V, Taub E, Sterling C, Vaughan L, Uswatte G, Fedio A, Sexton J, Cummings S, Logemann A, Lassiter N, Fedio P, Gremillion A, Nemeth D, Whittington T, Hansen R, Reckow J, Ferraro F, Lewandowski C, Cole J, Lewandowski A, Spector J, Ford-Johnson L, Lengenfelder J, Genova H, Sumowski J, DeLuca J, Chiaravalloti N, Loughan A, Perna R, Hertza J, Morse C, McKeever J, Zhao L, Leist T, Schultheis M, Marcinak J, Piecora K, Al-Khalil K, Webbe F, Mulligan K, Robbins J, Berthelson L, Martin P, Golden C, Piecora K, Marcinak J, Al-Khalil K, Webbe F, Mulligan K, Stewart J, Acevedo A, Ownby R, Thompson L, Kowalczyk W, Golub S, Davis A, Lemann E, Piehl J, Rita N, Moss L, Davis A, Boseck J, Berry K, Koehn E, Meyer B, Gelder B, Davis A, Nogin R, Moss L, Drapeau C, Malm S, Davis A, Lemann E, Koehn E, Drapeau C, Malm S, Boseck J, Armstrong L, Glidewell R, Orr W, Mears G. Grand Rounds. Arch Clin Neuropsychol 2012. [DOI: 10.1093/arclin/acs070] [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: 11/15/2022] Open
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Ehnert S, Braun K, Buchholz A, Freude T, Egaña J, Schenck T, Schyschka L, Neumaier M, Döbele S, Stöckle U, Nussler A. Diallyl-disulphide is the effective ingredient of garlic oil that protects primary human osteoblasts from damage due to cigarette smoke. Food Chem 2012. [DOI: 10.1016/j.foodchem.2011.11.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Hermann K, Buchholz A, Loh A, Kiolbassa K, Miksch A, Joos S, Götz K. [Development, factor-analytical control and psychometric evaluation of a questionnaire on specialty choices among medical students]. Gesundheitswesen 2011; 74:426-34. [PMID: 21796590 DOI: 10.1055/s-0031-1280845] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
AIM OF THE STUDY A questionnaire was developed and validated which assesses factors influencing career choices of medical students and their perception of possibilities in general practice. METHODS The first questionnaire version, which was developed based on a systematic literature review, was checked for comprehensibility and redundancy using concurrent think aloud. The revised version was filled out by a pilot sample of medical students and the factor structure was assessed using principal component analysis (PCA). The final version was filled out in an online survey by medical students of all 5 Medical Faculties in the federal state of Baden-Wuerttemberg. The factor structure was validated with a confirmatory factor analysis (CFA). Reliability was assessed as internal consistency using Cronbach's α. RESULTS The questionnaire comprises 2 parts: ratings of (A) the individual importance and of (B) the possibilities in general practice on 5-point scales. The first version comprising 118 items was shortened to 63 items after conducting interviews using concurrent think aloud. A further 3 items giving no information were removed after piloting the questionnaire on 179 students. The 27 items of part A were structured in 7 factors (PCA): image, personal ambition, patient orientation, work-life balance, future perspectives, job-related ambition, and variety in job. This structure had a critical fit in the CFA applied to the final version filled out by 1 299 students. Internal consistency of the factors was satisfactory to very good (Cronbach's α=0.55-0.81). CONCLUSION The questionnaire showed good psychometric properties. Further, not assessed factors influence career choice resulting in unexplained variance in our dataset and the critical fit of the model.
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Affiliation(s)
- K Hermann
- Abteilung Allgemeinmedizin und Versorgungsforschung, Universitätsklinikum Heidelberg.
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Pauli S, von Velsen N, Burfeind P, Steckel M, Mänz J, Buchholz A, Borozdin W, Kohlhase J. CHD7 mutations causing CHARGE syndrome are predominantly of paternal origin. Clin Genet 2011; 81:234-9. [DOI: 10.1111/j.1399-0004.2011.01701.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [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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Raue W, Ordemann J, Jacobi CA, Menenakos C, Buchholz A, Hartmann J. Nissen versus Dor fundoplication for treatment of gastroesophageal reflux disease: a blinded randomized clinical trial. Dig Surg 2011; 28:80-6. [PMID: 21293136 DOI: 10.1159/000323630] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [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] [Received: 08/26/2010] [Accepted: 11/30/2010] [Indexed: 12/22/2022]
Abstract
INTRODUCTION Fundoplication techniques for treatment of gastroesophageal reflux are discussed concerning impairments and success. This randomized trial was conducted to compare Nissen's wrap and the anterior partial technique (Dor) concerning patients' quality of life (QoL) and functional data after a mid-term follow-up. METHODS In a 24-month period, 64 patients were equally randomized into group A (Nissen's fundoplication) and group B (180° anterior partial fundoplication). After a mean follow-up of 18 months, all patients were examined and interviewed using standardized QoL questionnaires (Gastrointestinal Quality of Life Index), Visick score, 24-hour pH-metry and esophageal manometry. Data of 57 patients (group A: 27, group B: 30) could be analyzed. RESULTS After partial fundoplication, 9 patients (30%) stated the operative results were worse than perfect. Only 2 patients (7%) evaluated the outcome after Nissen's fundoplication as unsuccessful (p = 0.04). However, postoperative Gastrointestinal Quality of Life Index showed no differences between groups (p = 0.5). Additionally, functional data were not different (DeMeester 10 vs. 12, p = 0.17, and lower esophageal sphincter pressure 13 vs. 12 mm Hg, p = 0.5). CONCLUSION The anterior partial fundoplication technique did not lead to disadvantages in postoperative QoL, physiological function and reflux control when compared to Nissen's approach in a mid-term follow-up.
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Affiliation(s)
- W Raue
- Department of General, Visceral, Vascular and Thoracic Surgery, University Medicine Berlin, Charité Campus Mitte, Germany.
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Buchholz A, Broekman T, Schippers G. Anwendung der ICF in der Suchthilfe am Beispiel des MATE-ICN. Suchttherapie 2010. [DOI: 10.1055/s-0030-1267210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Klein J, Buchholz A, Lindenmeyer J, Rist F. Prädiktoren der funktionalen Gesundheit zu Beginn und Ende einer Alkoholentwöhnungsbehandlung. Suchttherapie 2010. [DOI: 10.1055/s-0030-1267211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Buchholz A, Matthews K. Reduction of Salmonella on alfalfa seeds using peroxyacetic acid and a commercial seed washer is as effective as treatment with 20 000 ppm of Ca(OCl)2. Lett Appl Microbiol 2010; 51:462-8. [DOI: 10.1111/j.1472-765x.2010.02929.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [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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Norris ML, Spettigue W, Buchholz A, Henderson K, Gomez R, Harrison M. Dyslipidemia Independent of Body Mass in Antipsychotic Treated Patients with Anorexia Nervosa. Paediatr Child Health 2009. [DOI: 10.1093/pch/14.suppl_a.15ab] [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: 11/12/2022] Open
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Nicolai J, Bieber C, Buchholz A, Reuter K, Eich W, Härter M. Effekte von ärztlichen Trainingsmaßnahmen und Entscheidungshilfen zur Partizipativen Entscheidungsfindung (Shared Decision Making) bei Brust- und Darmkrebs-Patienten. Psychother Psychosom Med Psychol 2009. [DOI: 10.1055/s-0029-1208236] [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]
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Buchholz A, Wang W, Xu M, Arnold A, Hunger M. Sequential Steps of Ammoniation of the Microporous Silicoaluminophosphates H-SAPO-34 and H-SAPO-37 Investigated by In Situ CF MAS NMR Spectroscopy. J Phys Chem B 2004. [DOI: 10.1021/jp030249d] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- A. Buchholz
- Institute of Chemical Technology, University of Stuttgart, D-70550 Stuttgart, Germany
| | - W. Wang
- Institute of Chemical Technology, University of Stuttgart, D-70550 Stuttgart, Germany
| | - M. Xu
- Institute of Chemical Technology, University of Stuttgart, D-70550 Stuttgart, Germany
| | - A. Arnold
- Institute of Chemical Technology, University of Stuttgart, D-70550 Stuttgart, Germany
| | - M. Hunger
- Institute of Chemical Technology, University of Stuttgart, D-70550 Stuttgart, Germany
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Takors R, Hurlebaus J, Buchholz A, Degenring D, Schmitz M. Quantifizierung intrazellulärer Stoffwechseldynamiken inE. coli mit neuartigen Methoden. CHEM-ING-TECH 2002. [DOI: 10.1002/1522-2640(200205)74:5<690::aid-cite1111690>3.0.co;2-o] [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: 11/12/2022]
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Schmitz M, Buchholz A, Wandrey C, Takors R. LC-MS/MS zur Metabolit-Quantifizierung des Zentralstoffwechsels und der Aromatenbiosynthese inE. coli. CHEM-ING-TECH 2002. [DOI: 10.1002/1522-2640(200205)74:5<697::aid-cite697>3.0.co;2-4] [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: 11/11/2022]
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Buchholz A, Takors R, Wandrey C. Quantification of intracellular metabolites in Escherichia coli K12 using liquid chromatographic-electrospray ionization tandem mass spectrometric techniques. Anal Biochem 2001; 295:129-37. [PMID: 11488613 DOI: 10.1006/abio.2001.5183] [Citation(s) in RCA: 184] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The quantitative comprehension of microbial metabolic networks is a prerequisite for an efficient rational strain improvement ("metabolic engineering"). It is therefore necessary to accurately determine the concentration of a large number of reactants (i.e., metabolites, nucleotides, cofactors) in order to understand "in vivo" reaction kinetics. Quantification of intracellular concentrations of glycolytic intermediates and nucleotides in Escherichia coli K12 using a perchloric acid extraction and an LC-ESI-MS method was achieved. Intracellular metabolites (e.g., glucose 6-phosphate, fructose 1,6-bisphosphate, 6-phospho gluconate, acetyl-CoA, adenine nucleotides) were quantified under defined (glucose-limited steady-state) growth conditions. The method was verified by comparing the intracellular metabolite concentrations measured via LC-ESI-MS with enzymatic determinations. It is thus possible to identify and quantify more than 15 intracellular metabolites in parallel with a minimal amount of sample volume.
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Affiliation(s)
- A Buchholz
- Institute of Biotechnology 2, Research Centre Juelich, 52425 Juelich, Germany
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Caldarelli S, Buchholz A, Hunger M. Investigation of sodium cations in dehydrated zeolites LSX, X, and Y by 23Na off-resonance RIACT triple-quantum and high-speed MAS NMR spectroscopy. J Am Chem Soc 2001; 123:7118-23. [PMID: 11459492 DOI: 10.1021/ja0102538] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We investigated by two-dimensional 23Na ORIACT MQMAS NMR and one-dimensional 23Na high-speed MAS NMR spectroscopy a homologous series of dehydrated zeolites with faujasite structure. The framework silicon to aluminum ratios varied between 1.06 and 2.60. In the case of zeolites Y (nSi/nAl = 2.60), we studied materials with sodium exchange degrees between 0 and 95%. The recently introduced ORIACT method (Caldarelli, S.; Ziarelli, F. J. Am. Chem. Soc. 2000, 122, 12015) significantly improved the resolution of the MQMAS spectra, in comparison with earlier studies. It was thus possible to extract meaningful quadrupole parameters by MQMAS NMR, which were used as a starting point for the simulation of 1D MAS NMR spectra to obtain more accurate values of the NMR parameters and site occupancy. We were able to show by this approach that in zeolite NaLSX the SI positions in the hexagonal prisms are occupied by sodium cations. For the homologous series of zeolites Y, it was found that sodium cations located at SII positions are the easiest to be substituted by ammonium ions through the exchange process.
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Affiliation(s)
- S Caldarelli
- Institut de Recherches sur la Catalyse CNRS, 2 av. A. Einstein, F-69626 Villeurbanne, France
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Buchholz A, Takors R, Wandrey C. LC-MS Techniques for the Identification and Quantification of Intracellular Metabolites. CHEM-ING-TECH 2001. [DOI: 10.1002/1522-2640(200106)73:6<653::aid-cite6533333>3.0.co;2-c] [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: 11/09/2022]
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