Background and Purpose. Balance disability is common after stroke, but there is little detailed information about it. The aims of this study were to investigate the frequency of balance disability; to characterize different levels of disability; and to identify demographics, stroke pathology factors, and impairments associated with balance disability. Subjects. The subjects studied were 75 people with a first-time anterior circulation stroke; 37 subjects were men, the mean age was 71.5 years (SD=12.2), and 46 subjects (61%) had left hemiplegia. Methods. Prospective hospital-based cross-sectional surveys were carried out in 2 British National Health Service trusts. The subjects’ stroke pathology, demographics, balance disability, function, and neurologic impairments were recorded in a single testing session 2 to 4 weeks after stroke. Results. A total of 83% of the subjects (n=62) had a balance disability; of these, 17 (27%) could sit but not stand, 25 (40%) could stand but not step, and 20 (33%) could step and walk but still had limited balance. Subjects with the most severe balance disability had more severe strokes, impairments, and disabilities. Weakness and sensation were associated with balance disability. Subject demographics, stroke pathology, and visuospatial neglect were not associated with balance disability. Discussion and Conclusion. Subjects with the most severe balance disability had the most severe strokes, impairments, and disabilities. Subject demographics, stroke pathology, and visuospatial neglect were not associated with balance disability. [Tyson SF, Hanley M, Chillala J, et al. Balance disability after stroke. Phys Ther. 2006;86:30–38.]

No abstract

ObjectiveTo describe the demographics, mechanisms, presentation, injury patterns and outcomes for children with traumatic injuries.SettingData collected from the UK’s Trauma and Audit Research Network.Design and patientsThe demographics, mechanisms of injury and outcomes were described for children with moderate and severe injuries admitted to the Major Trauma Network in England between 2012 and 2017.ResultsData regarding 9851 children were collected. Most (69%) were male. The median age was 6.4 (SD 5.2) years, but infants aged 0.1 year (36.5 days) were the most frequently injured of all ages (0–15 years); 447 (36.0%) of injuries in infants aged <1 year were from suspected child abuse. Most injuries occurred in the home, from falls <2 m, after school hours, at weekends and during the summer. The majority of injuries were of moderate severity (median Injury Severity Score 9.0, SD 8.7). The limbs and pelvis, followed by the head, were the most frequently and most severely injured body parts. Ninety-two per cent were discharged home and 72.8% made a ‘good recovery’ according to the Glasgow Outcome Scale. 3.1% of children died, their median age was 7.0 years (SD 5.8), but infants were the most commonly fatally injured group.ConclusionsA common age of injury and mortality was infants aged <1 year. Accident prevention strategies need to focus on the prevention of non-accidental injuries in infants. Trauma services need to be organised to accommodate peak presentation times, which are after school, weekends and the summer.

BackgroundLimitations in upper limb functioning are common in Musculoskeletal disorders and the Disabilities of the Arm, Shoulder and Hand scale (DASH) has gained widespread use in this context. However, various concerns have been raised about its construct validity and so this study seeks to examine this and other psychometric aspects of both the DASH and QuickDASH from a modern test theory perspective.MethodsParticipants in the study were eligible if they had a confirmed diagnosis of Rheumatoid Arthritis (RA). They were mailed a questionnaire booklet which included the DASH. Construct validity was examined by fit to the Rasch measurement model. The degree of precision of both the DASH and QuickDASH were considered through their Standard Error of Measurement (SEM).ResultsThree hundred and thirty-seven subjects with confirmed RA took part, with a mean age of 62.0 years (SD12.1); 73.6% (n = 252) were female. The median standardized score on the DASH was 33 (IQR 17.5–55.0). Significant misfit of the DASH and QuickDASH was observed but, after accommodating local dependency among items in a two-testlet solution, satisfactory fit was obtained, supporting the unidimensionality of the total sets and the sufficiency of the raw (ordinal or standardized) scores.ConclusionHaving accommodated local response dependency in the DASH and QuickDASH item sets, their total scores are shown to be valid, given they satisfy the Rasch model assumptions. The Rasch transformation should be used whenever all items are used to calculate a change score, or to apply parametric statistics within an RA population.Significance and innovations Most previous modern psychometric analyses of both the DASH and QuickDASH have failed to fully address the effect of a breach of the local independence assumption upon construct validity.Accommodating this problem by creating ‘super items’ or testlets, removes this effect and shows that both versions of the scale are valid and unidimensional, as applied with a bi-factor equivalent solution to an RA population.The Standard Error of Measurement of a scale can be biased by failing to take into account the local dependency in the data which inflates reliability and thus making the SEM appear better (i.e. smaller) than the true value without bias. Electronic supplementary materialThe online version of this article (10.1186/s12891-019-2414-6) contains supplementary material, which is available to authorized users.

BackgroundAlthough the Disabilities of the Arm, Shoulder and Hand (DASH) questionnaire is widely used in the UK, no British English version is available. The aim of this study was to linguistically validate the DASH into British English and then test the reliability and validity of the British English DASH, (including the Work and Sport/Music DASH) and QuickDASH, in people with rheumatoid arthritis (RA).MethodsThe DASH was forward translated, reviewed by an expert panel and cognitive debriefing interviews undertaken with 31 people with RA. Content validity was evaluated using the ICF Core Set for RA. Participants with RA (n = 340) then completed the DASH, Health Assessment Questionnaire (HAQ), Short Form Health Survey v2 (SF36v2) and Measure of Activity Performance of the Hand (MAPHAND). We examined internal consistency and concurrent validity for the DASH, Work and Sport/Music DASH modules and QuickDASH. Participants repeated the DASH to assess test-retest reliability.ResultsMinor wording changes were made as required. The DASH addresses a quarter of Body Function and half of Activities and Participation codes in the ICF RA Core Set. Internal consistency for DASH scales were consistent with individual use (Cronbach’s alpha = 0.94–0.98). Concurrent validity was strong with the HAQ (rs = 0.69–0.91), SF36v2 Physical Function (rs = − 0.71 - − 0.85), Bodily Pain (rs = − 0.71 - − 0.74) scales and MAPHAND (rs = 0.71–0.93). Test-retest reliability was good (rs = 0.74–0.95).ConclusionsBritish English versions of the DASH, QuickDASH and Work and Sport/Music modules are now available to evaluate upper limb disabilities in the UK. The DASH, QuickDASH, Work and Sport/Music modules are reliable and valid to use in clinical practice and research with British people with RA.Electronic supplementary materialThe online version of this article (10.1186/s12891-018-2032-8) contains supplementary material, which is available to authorized users.

No abstract

Computational models that simulate individuals’ movements in pursuit-tracking tasks have been used to elucidate mechanisms of human motor control. Whilst there is evidence that individuals demonstrate idiosyncratic control-tracking strategies, it remains unclear whether models can be sensitive to these idiosyncrasies. Perceptual control theory (PCT) provides a unique model architecture with an internally set reference value parameter, and can be optimized to fit an individual’s tracking behavior. The current study investigated whether PCT models could show temporal stability and individual specificity over time. Twenty adults completed three blocks of 15 1-min, pursuit-tracking trials. Two blocks (training and post-training) were completed in one session and the third was completed after 1 week (follow-up). The target moved in a one-dimensional, pseudorandom pattern. PCT models were optimized to the training data using a least-mean-squares algorithm, and validated with data from post-training and follow-up. We found significant inter-individual variability (partial η2: .464–.697) and intra-individual consistency (Cronbach’s α: .880–.976) in parameter estimates. Polynomial regression revealed that all model parameters, including the reference value parameter, contribute to simulation accuracy. Participants’ tracking performances were significantly more accurately simulated by models developed from their own tracking data than by models developed from other participants’ data. We conclude that PCT models can be optimized to simulate the performance of an individual and that the test-retest reliability of individual models is a necessary criterion for evaluating computational models of human performance.

No differences between off-the-shelf and bespoke ankle-foot orthoses were found except that participants in the off-the-shelf orthosis group had less fear of falling at short-term follow-up.