Use of evidence in health professions education: Attitudes, practices, barriers and supports.

Introduction: Health professions educators are increasingly called upon to apply an evidence-informed approach to teaching and assessment practices. There is scant empirical research exploring educators' attitudes, practices, and perceived barriers and supports to using research evidence in educational practice. Methods: We conducted a survey of AMEE members to explore three domains related to evidence-informed health professions education: (1) attitudes; (2) practices; and (3) supports and barriers. Analyses involved descriptive statistics to characterize participants' responses per domain, exploratory factor analysis, and multivariate regression analyses. Results: Three hundred ninety-six (∼10%) participants representing health professions educators (HPEs) and non HPEs (e.g. PhDs) and different roles (e.g. teacher, administrator) completed the survey. Attitudes toward evidence-informed HPE were generally favorable. Several barriers preclude participants from engaging in evidence-informed approaches to health professions education (HPE). Discussion: This study provides preliminary evidence on the attitudes toward and perceived barriers and supports of research use in HPE from different groups of HP educators, clinicians, and administrators. The findings for each of the three domains require additional exploration using qualitative methodologies. Conclusion: Targeted interventions designed to increase the uptake of research in HPE should consider different stakeholder groups' perceptions regarding these approaches, current vs. best practices, and factors that may impede evidence-informed approaches.

Low Back Pain: Investigation of Biases in Outpatient Canadian Physical Therapy.

BACKGROUND: Previous research suggested that physical therapy services can be influenced by patient characteristics (age, sex, socioeconomic status) or insurance status rather than their clinical need. OBJECTIVE: The aim of this study was to determine whether patient-related factors (age, sex, SES) and the source of reimbursement for physical therapy services (insurance status) influence wait time for, frequency of, and duration of physical therapy for low back pain. DESIGN: This study was an empirical cross-sectional online survey of Canadian physical therapy professionals (defined as including physical therapists and physical rehabilitation specialists). METHODS: A total of 846 physical therapy professionals received 1 of 24 different (and randomly selected) clinical vignettes (ie, patient case scenarios) and completed a 40-item questionnaire about how they would treat the fictional patient in the vignette as well as their professional clinical practice. Each vignette described a patient with low back pain but with variations in patient characteristics (age, sex, socioeconomic status) and insurance status (no insurance, private insurance, Workers' Compensation Board insurance). RESULTS: The age, sex, and socioeconomic status of the fictional vignette patients did not affect how participants would provide service. However, vignette patients with Workers' Compensation Board insurance would be seen more frequently than those with private insurance or no insurance. When asked explicitly, study participants stated that insurance status, age, and chronicity of the condition were not factors associated with wait time for, frequency of, or duration of treatment. LIMITATIONS: This study used a standardized vignette patient and may not accurately represent physical therapy professionals' actual clinical practice. CONCLUSIONS: There appears to be an implicit professional bias in relation to patients' insurance status; the resulting inequity in service provision highlights the need for further research as a basis for national guidelines to promote equity in access to and provision of quality physical therapy services.

Low Back Pain: Current Patterns of Canadian Physiotherapy Service Delivery.

Purpose: The aim of this study was to describe the current patterns of service delivery of Canadian physiotherapy (PT) professionals working in adult musculoskeletal (MSK) outpatient practice. Methods: A total of 846 Canadian PT professionals working with an adult MSK outpatient clientele participated in an online survey about how they would treat a patient with low back pain (LBP). After reading an online clinical vignette about a fictional patient with varying insurance status, participants answered questions about how they would treat the patient (e.g., wait time, frequency and duration of treatment, time allotted for initial evaluation and treatment), about their actual practice (e.g., number of patients seen per day), and about their work setting. Results: The vignette patients with LBP would typically be seen within 2 weeks, especially in private practice, and most would receive care 2-3 times per week for 1-3 months. Initial evaluations and subsequent treatments would take 31-60 minutes. Two-thirds of participants reported treating 6-15 patients a day in their current practice setting. Differences were found between provinces and territories (with the longest wait time in Quebec), practice settings (with a longer wait time in the public sector), and insurance status (patients covered by workers' compensation are seen more frequently). Conclusion: This study adds to our knowledge of the accessibility of outpatient MSK PT services for patients with LBP in Canada, and it points to potential areas for improvement.

Objectif : décrire les modèles actuels de prestation de services en physiothérapie en clinique externe au Canada auprès de patients adultes ayant des problèmes musculosquelettiques. Méthodes : un total de 846 professionnels de la physiothérapie canadiens travaillant en clinique externe auprès de patients adultes ayant des problèmes musculosquelettiques ont répondu à un sondage en ligne à propos de leur manière de traiter un patient souffrant de douleur lombaire. Après avoir lu une vignette clinique en ligne au sujet d'un patient fictif au régime d'assurance variable, les participants ont répondu à des questions au sujet de la manière dont ils traiteraient le patient (ex. : temps d'attente, fréquence et durée des traitements, temps alloué à l'évaluation initiale et au traitement) ainsi que de leur pratique actuelle (ex. : nombre de patients vus par jour) et de leur cadre de travail. Résultats : les patients souffrant de douleur lombaire présentés dans la vignette clinique seraient normalement vus en deux semaines, particulièrement en pratique privée, et la plupart recevraient des soins de deux à trois fois par semaine pendant un à trois mois. Les évaluations initiales et les traitements subséquents dureraient entre 31 et 60 minutes. Les deux tiers des participants ont répondu qu'ils traitent entre 6 et 15 patients par jour dans leur cadre de travail actuel. Des différences sont notables entre les provinces et les territoires (le Québec a les temps d'attente les plus longs), les cadres de pratique (le temps d'attente est plus long dans le secteur public) et les régimes d'assurance (les patients couverts par une indemnisation des accidents du travail sont vus plus souvent). Conclusion : cette étude approfondit nos connaissances en lien avec l'accessibilité des services externes de physiothérapie musculosquelettique pour des patients souffrant de douleur lombaire au Canada et révèle des domaines d'amélioration potentiels.

Does the Finger-to-Nose Test measure upper limb coordination in chronic stroke?

BACKGROUND: We aimed to kinematically validate that the time to perform the Finger-to-Nose Test (FNT) assesses coordination by determining its construct, convergent and discriminant validity. METHODS: Experimental, criterion standard study. Both clinical and experimental evaluations were done at a research facility in a rehabilitation hospital. Forty individuals (20 individuals with chronic stroke and 20 healthy, age- and gender-matched individuals) participated.. Both groups performed two blocks of 10 to-and-fro pointing movements (non-dominant/affected arm) between a sagittal target and the nose (ReachIn, ReachOut) at a self-paced speed. Time to perform the test was the main outcome. Kinematics (Optotrak, 100Hz) and clinical impairment/activity levels were evaluated. Spatiotemporal coordination was assessed with slope (IJC) and cross-correlation (LAG) between elbow and shoulder movements. RESULTS: Compared to controls, individuals with stroke (Fugl-Meyer Assessment, FMA-UE: 51.9 ± 13.2; Box & Blocks, BBT: 72.1 ± 26.9%) made more curved endpoint trajectories using less shoulder horizontal-abduction. For construct validity, shoulder range (ß = 0.127), LAG (ß = 0.855) and IJC (ß = -0.191) explained 82% of FNT-time variance for ReachIn and LAG (ß = 0.971) explained 94% for ReachOut in patients with stroke. In contrast, only LAG explained 62% (ß = 0.790) and 79% (ß = 0.889) of variance for ReachIn and ReachOut respectively in controls. For convergent validity, FNT-time correlated with FMA-UE (r = -0.67, p < 0.01), FMA-Arm (r = -0.60, p = 0.005), biceps spasticity (r = 0.39, p < 0.05) and BBT (r = -0.56, p < 0.01). A cut-off time of 10.6 s discriminated between mild and moderate-to-severe impairment (discriminant validity). Each additional second represented 42% odds increase of greater impairment. CONCLUSIONS: For this version of the FNT, the time to perform the test showed construct, convergent and discriminant validity to measure UL coordination in stroke.

Detecting incipient schizophrenia: a validation of the Azima battery in first episode psychosis.

Early psychosis intervention aims to accurately detect adolescents and young adults at risk for major mental disorders, particularly schizophrenia, yet early biomedical diagnostic accuracy remains poor. However, phenomenological approaches focusing on eliciting and understanding the subjective experience of help-seeking youth better detect incipient schizophrenia. The Azima Battery is an occupational therapy projective assessment that uses expressive media in a standard setup, in order to phenomenologically elicit and describe the activity performance and narratives of individuals at risk of, or on, the psychotic-spectrum.The purpose of this study was to estimate the predictive validity of the Azima Battery with youth seeking help for a first episode of psychosis, and identify patterns of performance distinctive of a diagnosis of schizophrenia 1-year later. A mixed methods phenomenological approach was used to calculate the predictive validity of the Azima Battery in detecting incipient schizophrenia, and to qualitatively identify patterns of performance. Study results demonstrate that the diagnostic accuracy of the Azima Battery is greater than psychiatric interviewing for a future diagnosis of schizophrenia (N = 62: 88.7 % vs 42 %). Performance elements and patterns statistically distinctive of schizophrenia are described, and relate to the structure of the created objects. Therefore, the Azima Battery is a valid measure for clinical use by occupational therapists working in early intervention for psychosis as a complement to traditional psychiatric interviewing.

Vestibular Assessments in Children With Global Developmental Delay: An Exploratory Study.

PURPOSE: To compare results of 3 clinical vestibular tests between children with global developmental delay (GDD) and children with typical development (TD) and investigate the test-retest reliability. METHODS: Twenty children with GDD (aged 4.1-12.1 years) and 11 age-matched controls with TD participated. Participants with GDD underwent 2 sessions of testing. Each session consisted of the Clinical Test of Sensory Interaction and Balance (CTSIB), Dynamic Visual Acuity (DVA) test, and the modified Emory Clinical Vestibular Chair Test (m-ECVCT). RESULTS: Up to 33% of the children with GDD had abnormal DVA scores. m-ECVCT results of children with GDD demonstrated larger variance than children with TD. The CTSIB score was significantly reduced in the group with GDD. The test-retest reliability varied, with good reliability for the m-ECVCT and CTSIB, and fair reliability for the DVA. CONCLUSIONS: Findings suggest vestibular involvement in children in GDD. The clinical tests demonstrated moderate test-retest reliability.

Depressive symptoms influence use of feedback for motor learning and recovery in chronic stroke.

PURPOSE: Sensorimotor impairments and depressive symptoms (PSD) influence arm motor recovery post-stroke. Feedback provision improves upper limb motor learning in patients with chronic stroke but factors including PSD may affect ability to use feedback. We evaluated the influence of PSD on the ability to use auditory feedback for upper limb recovery and motor learning in patients with chronic stroke. METHODS: Participants (n = 24) practiced 72 pointing movements/session (6 targets, 12 sessions, randomized) with auditory feedback on movement speed and trunk displacement. The presence of PSD (Beck's Depression Inventory; BDI-II) was assessed at pre-intervention (PRE). Arm motor impairment (Fugl-Meyer Assessment, shoulder horizontal adduction, shoulder flexion, elbow extension ranges, trunk displacement) and arm use (Motor Activity Log) were assessed at PRE, immediately after (POST) and retention (3 mos; RET). Participants were divided into two groups based on BDI-II scores: ≥ 14/63 (DEP group; n = 8; score: 20.5 ± 7.5) and ≤ 13/63 (no PSD (ND) group; n = 16; score: 5.0 ± 3.8). Changes in impairment and arm use levels were assessed (mixed-model ANOVAs). RESULTS: All participants improved arm use. DEP had lower Fugl-Meyer scores, used more compensatory trunk displacement and had lower shoulder horizontal adduction range compared to ND. CONCLUSION: The presence of PSD diminished the ability to use auditory feedback for arm motor recovery and motor learning.

Participation in Leisure Activities among Canadian Children with Arthritis: Results from a National Representative Sample.

OBJECTIVE: To describe the level of participation in leisure activities among children and youth with arthritis, as well as to identify the sociodemographic (age, sex, family income), disease-related (functional limitations, disease duration, pain, medication use, child's need for assistance), and contextual factors (use of rehabilitation services, proximity of local recreation facilities, cost of activities) that may be associated. METHODS: Data from the Participation and Activity Limitation Survey (PALS) 2006, a Canadian postcensus survey, was analyzed. Bivariate and multivariable linear regression analyses were applied to examine the associations between the sample's level of participation in leisure activities, and sociodemographic, disease-related, and contextual characteristics. RESULTS: In Canada in 2006, an estimated 4350 children ranging in age from 5 to 14 years were living with arthritis. Fifty-six percent of parents reported that arthritis restricted their child's participation in leisure activities. Bivariate analysis showed that the availability of local recreational facilities, the affordability of activities, and the child not requiring any assistance were all associated (modified Bonferroni correction α < 0.005) with greater participation in various types of leisure activities. Multiple linear regressions showed that higher family income (ß 0.47, 95% CI 0.09, 0.85) and greater perceived pain (ß 0.59, 95% CI 0.07, 1.10) were positively associated with involvement in informal leisure. CONCLUSION: Our findings underline the importance of considering contextual factors in developing treatment plans aimed at improving participation in leisure activities among children with arthritis. Future longitudinal studies targeting children living with arthritis could provide pertinent information on participation over fluctuations in disease status.

Injury to the premature cerebellum: outcome is related to remote cortical development.

Cerebellar injury is an important complication of preterm birth with far-reaching neuropsychiatric sequelae. We have previously shown a significant association between isolated injury to the premature cerebellum and subsequent impairment of regional volumetric growth in the contralateral cerebrum. In the current study, we examine the relationship between these remote regional impairments of cerebral volumetric growth and domain-specific functional deficits in these children. In 40 ex-preterm infants with isolated cerebellar injury, we performed neurodevelopmental evaluations and quantitative magnetic resonance imaging (MRI) studies at a mean age of 34 months. We measured cortical gray matter volumes in 8 parcellated regions of each cerebral hemisphere, as well as right and left cerebellar volumes. We show highly significant associations between early signs of autism and dorsolateral prefrontal cortex volume (P < 0.001); gross motor scores and sensorimotor cortical volumes (P < 0.001); and cognitive and expressive language scores and premotor and mid-temporal cortical volumes (P < 0.001). By multivariate analyses, each unit increase in the corresponding regional cerebral volume was associated with lower odds of abnormal outcome score, adjusted for age at MRI and contralateral cerebellar volume. This is the first report linking secondary impairment of remote cerebral cortical growth and functional disabilities in survivors of prematurity-related cerebellar brain injury.

Arm motor recovery using a virtual reality intervention in chronic stroke: randomized control trial.

INTRODUCTION: Despite interest in virtual environments (VEs) for poststroke arm motor rehabilitation, advantages over physical environment (PE) training have not been established. OBJECTIVE: The authors compared kinematic and clinical outcomes of dose-matched upper-limb training between a 3D VE and a PE in chronic stroke. METHODS: Participants (n = 32) were randomized to a 3D VE or PE for training. They pointed to 6 workspace targets (72 trials, 12 trials/target, randomized) for 12 sessions over 4 weeks with similar feedback on precision, movement speed, and trunk displacement. Primary (kinematics, clinical arm motor impairment) and secondary (activity level, arm use) outcomes were compared by time (PRE, POST, and follow-up, RET), training environment, and impairment severity (mild, moderate-to-severe) using mixed-model analyses of variance (ANOVAs). RESULTS: Endpoint speed, overall performance on a reach-to-grasp task, and activity levels increased in both groups. Only participants in the VE group improved shoulder horizontal adduction at POST (9.5°) and flexion at both POST (6.3°) and RET (13°). Impairment level affected outcomes. After VE training, the mild group increased elbow extension (RET, 25.5°). The moderate-to-severe group in VE increased arm use at POST (0.5 points) and reaching ability at RET (2.2 points). The moderate-to-severe group training in PE increased reaching ability earlier (POST, 1.7 points) and both elbow extension (10.7°) and arm use (0.4 points) at RET, but these changes were accompanied by increased compensatory trunk displacement (RET, 30.2 mm). CONCLUSION: VE training led to more changes in the mild group and a motor recovery pattern in the moderate-to-severe group indicative of less compensation, possibly because of a better use of feedback.

Visual vertigo analogue scale: an assessment questionnaire for visual vertigo.

A common symptom for people with vestibulopathy is dizziness induced by dynamic visual input, known as visual vertigo (VV). The goal of this study is to present a novel method to assess VV, using a nine-item analog scale. The subjects rated the intensity of their dizziness on each item of the Visual Vertigo Analogue Scale (VVAS), which represented a daily situation typically inducing VV. The questionnaire was completed by participants with vestibulopathy (n=102) and by subjects receiving out-patient orthopaedic physiotherapy (n=102). The dizziness handicap inventory (DHI) was also completed by the vestibulopathic group. The Cronbach's Alpha index indicated the VVAS is internally consistent and reliable (Cronbach's Alpha=0.94). The study also found that the VVAS severity scores from vestibular and a non-vestibular population were significantly different (Wilcoxon-Mann Whitney test p < 0.0001). Spearman correlation analysis conducted between DHI and VVAS scores for the clients with vestibulopathy showed positive moderate correlations between the VVAS score and the total DHI score (r=0.67, p< 0.0001). This study showed that the VVAS scale may be useful in providing a quantitative evaluation scale of visual vertigo.

Sensitivity and specificity of French language and processing measures for the identification of primary language impairment at age 5.

PURPOSE: Research on the diagnostic accuracy of different language measures has focused primarily on English. This study examined the sensitivity and specificity of a range of measures of language knowledge and language processing for the identification of primary language impairment (PLI) in French-speaking children. Because of the lack of well-documented language measures in French, it is difficult to accurately identify affected children, and thus research in this area is impeded. METHOD: The performance of 14 monolingual French-speaking children with confirmed, clinically identified PLI (M = 61.4 months of age, SD = 7.2 months) on a range of language and language processing measures was compared with the performance of 78 children with confirmed typical language development (M age = 58.9 months, SD = 5.7). These included evaluations of receptive vocabulary, receptive grammar, spontaneous language, narrative production, nonword repetition, sentence imitation, following directions, rapid automatized naming, and digit span. Sensitivity, specificity, and likelihood ratios were determined at 3 cutoff points: (a) -1 SD, (b) -1.28 SD, and (b) -2 SD below mean values. Receiver operator characteristic curves were used to identify the most accurate cutoff for each measure. RESULTS: Significant differences between the PLI and typical language development groups were found for the majority of the language measures, with moderate to large effect sizes. The measures differed in their sensitivity and specificity, as well as in which cutoff point provided the most accurate decision. Ideal cutoff points were in most cases between the mean and -1 SD. Sentence imitation and following directions appeared to be the most accurate measures. CONCLUSIONS: This study provides evidence that standardized measures of language and language processing provide accurate identification of PLI in French. The results are strikingly similar to previous results for English, suggesting that in spite of structural differences between the languages, PLI in both languages involves a generalized language delay across linguistic domains, which can be identified in a similar way using existing standardized measures.

Validity of movement pattern kinematics as measures of arm motor impairment poststroke.

BACKGROUND AND PURPOSE: Upper limb motor impairment poststroke is commonly evaluated using clinical outcome measures such as the Fugl-Meyer Assessment. However, most clinical measures provide little information about motor patterns and compensations (eg, trunk displacement) used for task performance. Such information is obtained using movement quality kinematic variables (joint ranges, trunk displacement). Evaluation of movement quality may also help distinguish between levels of motor impairment severity in individuals poststroke. Our objective was to estimate concurrent and discriminant validity of movement quality kinematic variables for pointing and reach-to-grasp tasks. METHODS: A retrospective study of kinematic data (sagittal trunk displacement, shoulder flexion, shoulder horizontal adduction, elbow extension) and Fugl-Meyer Assessment scores from 86 subjects (subacute to chronic stroke) performing pointing and reaching tasks was done. Multiple and logistic regression analyses were used to estimate concurrent and discriminant validity respectively. Cutoff points for distinguishing between levels of upper limb motor impairment severity (mild, moderate to severe) were estimated using sensitivity/specificity decision plots. The criterion measure used was the Fugl-Meyer Assessment (upper limb section). RESULTS: The majority of variance in Fugl-Meyer Assessment scores was explained by a combination of trunk displacement and shoulder flexion (51%) for the pointing task and by trunk displacement alone (52%) for the reach-to-grasp task. Trunk displacement was the only variable that distinguished between levels of motor impairment severity. Cutoff points were 4.8 cm for pointing and 10.2 cm for reach-to-grasp movements. CONCLUSIONS: Movement quality kinematic variables are valid measures of arm motor impairment levels poststroke. Their use in regular clinical practice and research is justified.

Clinical management of musculoskeletal injuries in active children and youth.

OBJECTIVE: To describe how different health care specialists manage musculoskeletal injury in children and examine factors influencing return to play decisions. DESIGN: National survey. SETTING: Secure Web site hosting online questionnaire. PARTICIPANTS: Medical doctors, physical therapists, and athletic therapists who were members of their respective sport medicine specialty organizations. INDEPENDENT VARIABLES: Professional affiliation and the effect of the following factors were examined: pushy parent, cautious parent, protective equipment, previous injury, musculoskeletal maturity, game importance, position played, team versus individual sport, and time since injury. MAIN OUTCOME MEASURES: Recommendation of return to activity after common injuries seen in children and adolescents as described in 5 vignettes; consistency of responses across vignettes. RESULTS: The survey was completed by 464 respondents (34%). There were several differences between the professional groups in their recommendations to return to activity. Most factors studied did not tend to influence the decision to return to activity, although protective equipment often increased the response to return sooner. The number of participants who would return a child to activity sooner or later for each factor varied greatly across the 5 vignettes, except for pushy parent or cautious parent. CONCLUSIONS: Management practices of sport medicine clinicians vary according to profession, child, clinical factors, and sport-related factors. Decisions regarding return to play vary according to 5 specific characteristics of each clinical case. These findings help establish areas of consensus and disagreement in the management of children with injuries and safe return to physical activity.

Cerebellar injury in the premature infant is associated with impaired growth of specific cerebral regions.

We have shown that cerebellar injury in the premature infant is followed by significant growth impairment of the contralateral cerebral hemisphere evident as early as term adjusted age. In this study, we hypothesize that this remote growth restriction is region specific in the cerebrum. In a prospectively enrolled cohort of 38 expreterm infants with isolated cerebellar injury by neonatal MRI, we performed follow-up volumetric MRI studies at a mean postnatal age of 35.5 +/- 13.8 mo. We measured volumes of cortical and subcortical gray matter, and cerebral white matter within eight parcellated regions for each cerebral hemisphere. Unilateral cerebellar injury (n = 24) was associated with significantly smaller volumes of cortical gray and cerebral white matter in the following regions of the contralateral (versus ipsilateral) cerebral hemisphere: dorsolateral prefrontal, premotor (PM), sensorimotor, and midtemporal regions (p < 0.001 for all except midtemporal cortical gray, p = 0.01), as well as subcortical gray matter in the PM region (p < 0.001). Conversely, in cases of bilateral cerebellar injury (n = 14), there was no significant interhemispheric difference in tissue volumes for any of the cerebral regions studied. These findings suggest that regional cerebral growth impairment results from interruption of cerebellocerebral connectivity and loss of neuronal activation critical for development.

Leisure activity preferences for 6- to 12-year-old children with cerebral palsy.

AIM: The objective was to describe leisure activity preferences of children with cerebral palsy (CP) and their relationship to participation. Factors associated with greater interest in leisure activities were identified. METHOD: Fifty-five school-aged children (36 males, 19 females; mean age 9 y 11 mo; range 6 y 1 mo-12 y 11 mo) with CP (Gross Motor Function Classification System [GMFCS]) level I 62%, level II 22%, level III-IV 16%; 33.3% hemiplegia, 29.6% diplegia, 25.9% quadriplegia, 11.2% other) who could complete the Preferences for Activities of Children (PAC) were recruited. RESULTS: Social and recreational activities were most preferred, and self-improvement activities were least preferred. Younger age, higher motivation, and IQ predicted interest in active-physical activities (r(2)=0.39). Negative reaction to failure was associated with less preference for social activities (r(2)=0.16), whereas increased prosocial behaviours were related to greater preference for recreational (r(2)=0.13) and self-improvement activities; the latter is also predicted by older age (r(2)=0.24). Interest in skill-based activities was greater in females and in children who were highly motivated, younger, and had greater motor limitations (r(2)=0.51). The findings suggest that personal factors and functional abilities influence leisure activity preferences. High preference for certain activities was not always associated with involvement in these activities. INTERPRETATION: Determination of preferences is inherent to child-centred practice and should, therefore, be part of the evaluation process. Rehabilitation strategies can minimize barriers to leisure participation, such as fear of failure, low motivation, or environmental obstacles.

Clinical evaluation of dynamic visual acuity in subjects with unilateral vestibular hypofunction.

OBJECTIVES: The objectives of this study are threefold: 1) to examine the effect of frequency of head motion on the clinical dynamic visual acuity (DVA) score in subjects with unilateral vestibular hypofunction (UVH); 2) to compare DVA scores between subjects with UVH and subjects with a complete unilateral vestibular deficit; and 3) to establish whether a relationship exists between the extent of the vestibular deficit and the DVA score. DESIGN: Experimental study. SETTING: Vestibular outpatient rehabilitation program. METHODS: A convenience sample of 10 subjects with UVH. MAIN OUTCOME MEASURES: Dynamic visual acuity scores were recorded using 2 standard acuity charts: Snellen and E-chart. The DVA scores were obtained at slow (0.5 Hz), moderate (1 and 1.5 Hz), and fast (2.0 Hz) frequencies of head motion in the horizontal and the vertical planes. Percentage of caloric weakness was compared with DVA scores in each subject to test whether a relationship exists between the two. RESULTS: As the frequency of head motion increased, the number of UVH subjects with an abnormal DVA score increased. Subjects with an abnormal DVA score at 1 Hz had the same or higher score as the frequency of the head motion was increased. Spearman correlation analyses revealed low-correlation coefficients between percentage of vestibular paresis at the caloric test and DVA scores (horizontal direction: r = 0.31, p = 0.38 for Snellen chart and r = -0.33, p = 0.35 for the E-chart; vertical: r = 0.05, p = 0.91 for the Snellen chart and r = -0.28, p = 0.50 for the E-chart). CONCLUSION: Subjects with UVH manifest impaired DVA. The frequency of head motion has an impact on clinical DVA scores in UVH subjects.

Participation and enjoyment of leisure activities in school-aged children with cerebral palsy.

The objective of this study was to characterize participation in leisure activities in children with cerebral palsy (CP) and identify determinants of greater involvement. Ninety-five children of school age (9y 7mo [SD 2y 1mo]) with CP were recruited, and participation was evaluated with the Children's Assessment of Participation and Enjoyment in a subset (67/95; 42 males, 25 females) who could actively participate in completion of the assessment. Most had mild motor dysfunction (Gross Motor Function Classification System: 59% level I, 23% level II, 18% levels III-V) and had a spastic subtype of CP (23 hemiplegia, 17 diplegia, 16 quadriplegia, 11 other). Biomedical, child, family and environmental predictor variables were considered in the analysis. Results demonstrated that these children were actively involved in a wide range of leisure activities and experienced a high level of enjoyment. However, involvement was lower in skill-based and active physical activities as well as community-based activities. Mastery motivation and involvement in rehabilitation services enhanced involvement (intensity and diversity) in particular leisure activities, whereas cognitive and behavioral difficulties, activity limitations, and parental stress were obstacles to participation.

Effect of testing position on dynamic visual acuity.

OBJECTIVE: To investigate the effect of altering testing position on dynamic visual acuity (DVA) in vestibulopathic adults. STUDY DESIGN: Quasiexperimental research. SETTING: Outpatient vestibular program. PATIENTS: Twelve vestibulopathic adults with impaired DVA in the sitting position. METHODS: DVA scores were collected during (1) sitting, (2) standing comfortably, and (3) semitandem standing as subjects viewed a vision (E) chart 3.48 m in front of them. DVA was obtained as the head was passively moved by the evaluator at a frequency of 1.5 Hz in both horizontal and vertical directions. A further subgroup of subjects (n=5) was retested after performing the "viewing x1" gaze stability home exercise four times daily (1 minute duration in the horizontal direction while sitting) for 2 months. MAIN OUTCOME MEASURE: Noncomputerized DVA score. RESULTS: The DVA score remained constant independent of testing position as the Friedman test did not reveal any significant differences in the DVA scores in the horizontal or vertical direction. Subjects who improved after performing the viewing x1 exercise in the horizontal direction in the sitting position tended to have the same improvement in DVA in all three positions. CONCLUSIONS: The results of this study show that DVA score is independent of testing position. This is clinically important since it shows that the results of DVA testing in one position are valid for other positions and that subjects can be trained to improve their DVA in a sitting posture while having carry-over effects to other, more challenging postures.

Validity and reliability of the modified shuttle walk test in patients with chronic obstructive pulmonary disease.

OBJECTIVES: (1) To examine the concurrent criterion validity of the modified shuttle walk test (MSWT) by using the 6- (6MWT) and 12-minute walk test (12MWT), (2) to examine the concurrent criterion validity of the estimated maximum oxygen uptake (Vo2max) of the MSWT with actual Vo2max, and (3) to determine test-retest reliability of the MSWT in patients with chronic obstructive pulmonary disease (COPD). DESIGN: Validation study. SETTING: Outpatient pulmonary rehabilitation program. PARTICIPANTS: Thirty clinically stable adults with COPD. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Subjects were randomly assigned to receive either the 6MWT and 12MWT or the MSWT first. The MSWT was repeated 1 week later (N = 30). Estimated Vo2max was calculated, and actual Vo2max was conducted by using the Jones test. Validity of the MSWT was assessed by comparing endurance scores and Vo2max with results from the 6MWT and 12MWT and Jones test, respectively. RESULTS: There was a moderately high correlation between the MSWT and the 6MWT and 12MWT at initial testing (.82 and .74, respectively). Correlation between estimated and actual Vo2max was r equal to .68. Test-retest reliability for the entire sample was high (intraclass correlation coefficient, .88). Results remained quite stable across severity, age, and sex subgroups. CONCLUSIONS: The MSWT is a standardized externally paced submaximal endurance walking test. The results indicate that the MSWT has high concurrent validity and test-retest reliability for patients with COPD.