Hamstring spasticity assessment: does the hip flexion angle impact outcomes?

PURPOSE: Hamstring spasticity is prevalent following neurological injury. The standardized assessment involves passive knee extension, in a position of 90° hip flexion. This creates passive insufficiency of the muscle and lacks ecological validity for walking, whereby the hip typically flexes to a maximum of 40° during swing phase, while the knee extends. This study compared assessment outcomes when completed in 40° and 90° hip flexion. METHODS: The Modified Ashworth Scale and Modified Tardieu Scale, were performed on 35 adults with a neurological condition. Each participant was assessed by three assessors, resulting in 105 trials at 40° and 90°. RESULTS: There was a significant increase in the proportion of trials rated as spastic using the Modified Ashworth Scale (p=.012, phi=.27), and Modified Tardieu Scale (p<.001, phi=.36), and the severity of spasticity using the Modified Ashworth Scale (p<.001, effect size (ES)=.50), and Modified Tardieu Scale (p<.001 ES=.47), at 90° hip flexion. The angle of reaction occurred 32° earlier at 90° hip flexion (p<.001, ES = 1.61). CONCLUSIONS: Completing hamstring assessments in 40° hip flexion may reduce the passive insufficiency and improve the ecological validity of assessment, for walking. This may assist in the selection of patients requiring intervention, when their goal relates to walking.

The position of the hip joint impacts hamstring spasticity assessment outcomes, regardless of the clinical outcome measure chosenThe application of bedside assessment methods in a manner reflective of functional tasks may assist in selecting individuals who require active spasticity interventionAs per international guidelines, the use of validated outcome measures in a goal directed and patient centered manner is required to maximize patient care.

Controlling modified Tardieu scale assessment speeds to match joint angular velocities during walking impacts spasticity assessment outcomes.

OBJECTIVE: To investigate whether tailoring the speed of the Modified Tardieu Scale to reflect an individual's joint angular velocity during walking influences spasticity assessment outcomes. DESIGN: Observational trial. SETTING: Inpatient and outpatient neurological hospital department. SUBJECTS: Ninety adults with lower-limb spasticity. INTERVENTIONS: N/A. MAIN MEASURES: The Modified Tardieu Scale was used to assess the gastrocnemius, soleus, hamstrings and quadriceps. The V1 (slow) and V3 (fast) movements were completed as per standardised testing. Two additional assessments were completed, reflecting joint angular velocities during walking based on (i) a healthy control database (controlled velocity) and (ii) the individual's real-time joint angular velocities during walking (matched velocity). The agreement was compared using Cohen's and Weighted Kappa statistics, sensitivity and specificity. RESULTS: There was poor agreement when rating trials as spastic or not spastic at the ankle joint (Cohen's Kappa = 0.01-0.17). Trials were classified as spastic during V3 and not spastic during the controlled conditions in 81.6-85.1% of trials when compared to stance phase dorsiflexion angular velocities and 48.0-56.4% when compared to swing phase dorsiflexion angular velocities. The severity of muscle reaction demonstrated poor agreement at the ankle (Weighted Kappa = 0.01-0.28). At the knee, there was a moderate-excellent agreement between the V3 and controlled conditions when rating a trial as spastic or not spastic (Cohen's Kappa = 0.66-0.84) and excellent agreement when comparing severity (Weighted Kappa = 0.73-0.94). CONCLUSION: The speed of assessment impacted spasticity outcomes. It is possible that the standardised protocol may overestimate the impact spasticity has on walking, especially at the ankle.

The Brief Coping Orientation to Problems Experienced (Brief COPE): Improving Construct Validity and Reliability in a Cohort of Health Professionals.

OBJECTIVES: While the Brief Coping Orientation to Problems Experienced (Brief COPE) is widely used in clinical and nonclinical populations, the reliability of its subscales is uncertain. This study aimed to establish and improve the construct validity and reliability of the Brief COPE in a cohort of Australian rehabilitation health professionals. METHODS: 343 rehabilitation health professionals completed the Brief COPE and a demographic questionnaire in an anonymous online survey. Principal components analysis was performed to identify the number of factors in the Brief COPE. Factors were interpreted against the theoretical constructs intended to underlie the instrument. Items loading on separate factors then underwent reliability analysis to determine internal consistency of subscales. RESULTS: Principal components analysis identified two dimensions (task-focused coping and distraction-focused coping) in a modified version of the Brief COPE, with appropriate construct validity and a high level of reliability (Cronbach's alpha: 0.72 to 0.82). The two dimensions were distinct from each other and accounted for over 50% of variance between items. CONCLUSION: The modified Brief COPE scale is consistent with existing theories of coping, has demonstrated acceptable reliability and construct validity in a cohort of health professionals, and is appropriate for use in future studies of similar populations.

Clinical spasticity assessment using the Modified Tardieu Scale does not reflect joint angular velocity or range of motion during walking: Assessment tool implications.

OBJECTIVE: Spasticity assessment is often used to guide treatment decision-making. Assessment tool limitations may influence the conflicting evidence surrounding the relationship between spasticity and walking. This study investigated whether testing speeds and joint angles during a Modified Tardieu assessment matched lower-limb angular velocity and range of motion during walking. DESIGN: Observational study. SUBJECTS: Thirty-five adults with a neurological condition and 34 assessors. METHODS: The Modified Tardieu Scale was completed. Joint angles and peak testing speed during V3 (fast) trials were compared with these variables during walking in healthy people, at 0.400.59, 0.600.79 and 1.401.60 m/s. The proportion of trials in which the testing speed, start angle, and angle of muscle reaction matched the relevant joint angles and angular velocity during walking were analysed. RESULTS: The Modified Tardieu Scale was completed faster than the angular velocities seen during walking in 88.7% (0.400.59 m/s), 78.9% (0.600.79 m/s) and 56.2% (1.401.60 m/s) of trials. When compared with the normative dataset, 4.2%, 9.5% and 13.7% of the trials met all criteria for each respective walking speed. CONCLUSION: When applied according to the standardized procedure and compared with joint angular velocity during walking, clinicians performed the Modified Tardieu Scale too quickly.

Toward Accurate Clinical Spasticity Assessment: Validation of Movement Speed and Joint Angle Assessments Using Smartphones and Camera Tracking.

OBJECTIVE: To investigate whether a three-dimensional (3-D) camera (Microsoft Kinect) and a smartphone can be used to accurately quantify the joint angular velocity and range of motion (ROM) compared to a criterion-standard 3-D motion analysis system during a lower limb spasticity assessment. DESIGN: Observational, criterion-standard comparison study. SETTING: Large rehabilitation center. PARTICIPANTS: A convenience sample of 35 controls, 35 patients with a neurologic condition, and 34 rehabilitation professionals (physiotherapists and rehabilitation doctors) participated (N=104). INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: The Modified Tardieu Scale was used to assess spasticity of the quadriceps, hamstrings, soleus, and gastrocnemius. Data for each trial were collected concurrently using the criterion-standard Optitrack 3-D motion analysis (3DMA) system, Microsoft Kinect, and a smartphone. Each healthy control participant was assessed by 1 health professional and each patient with a neurological condition was assessed by 3 health professionals. Spearman correlation coefficient and intraclass correlation coefficient with 95% confidence intervals were used to report the strength of the relationships investigated. RESULTS: The smartphone and Microsoft Kinect demonstrated excellent concurrent validity with the 3DMA system. Overall, 74.8% of the relationships investigated demonstrated a very strong (≥0.80) correlation across all of the testing parameters. The Microsoft Kinect was superior to the smartphone for measuring joint start and end angle, the smartphone was superior for measuring joint angular velocity, and the 2 systems were comparable for measuring total joint ROM. CONCLUSIONS: These findings provide preliminary evidence that user-friendly, low-cost technologies can be used to facilitate accurate measurements of joint angular velocity and angles during a lower limb spasticity assessment in a clinical setting.

Inter- and intra-rater variability of testing velocity when assessing lower limb spasticity.

OBJECTIVE: To establish the variability of fast testing velocity and joint range of motion and position when assessing lower-limb spasticity in individuals following neurological injury. DESIGN: Observational study of people with lower-limb spasticity. SUBJECTS: Patients with an upper motor neurone lesion (n = 35) and clinicians experienced in spasticity assessment (n = 34) were included. METHODS: The Modified Tardieu scale (MTS) was completed on the quadriceps, hamstrings (2 positions), gastrocnemius and soleus for each participant's more affected lower limb by 3 assessors. Mean absolute differences (MADs) were used to calculate variability as a measure of reliability. RESULTS: Variability of peak testing velocity was greater at the ankle joint compared with the knee joint. The greatest MAD for V3 (fast) inter-rater testing velocity was 119°/s in the soleus, representing 29.4% of the mean variable value, and least for the quadriceps (64.3°/s; 18.5%). Inter-rater variability was higher than intra-rater variability for all testing parameters. The MAD for joint end angle ranged from 2.6° to 10.7° and joint start angle from 1.2° to 14.4°. CONCLUSION: There was a large degree of inter- and intra-rater variability in V3 testing velocity when using the MTS to assess lower limb spasticity. The inter-rater variability was approximately double the intra-rater variability.

Acute Predictors of Social Integration Following Mild Stroke.

BACKGROUND: Despite an acknowledged need to accurately predict stroke outcome, there is little empirical evidence regarding acute predictors of participation restriction post stroke. The current study examines prediction of social integration following mild stroke, using combinations of acute poststroke factors. PATIENTS AND METHODS: In a prospective, longitudinal study, a cohort of 60 stroke survivors was followed up at 6 months post stroke. Hierarchical multiple regression analyses were employed to evaluate the value of acute poststroke variables in predicting social integration at 6 months post stroke. RESULTS: A combination of age, number of comorbidities, stroke severity, social support factors, and general self-efficacy in the acute poststroke period accounted for 42% of the variance in 6-month social integration. The largest amount of variance (20%) was explained by inclusion of social support factors, including number and types of support. Post hoc analysis was conducted to establish whether marital status was the mediating variable through which early poststroke social support factors exerted influence upon subsequent social integration. The new combination of acute variables accounted for 48% of the variance in 6-month social integration. Results suggested that subjects with partners perceived higher levels of functional social support and lower levels of participation restriction. DISCUSSION: Stroke survivors with partners may receive greater amounts of companionship and encouragement from their partners, which enhances self-esteem and confidence. Such individuals are possibly more able to participate in and maintain relationships, thus improving social integration. CONCLUSIONS: Social support factors, mediated via marital status, are the strongest predictors of subsequent social integration following mild stroke.

The DASS-14: Improving the Construct Validity and Reliability of the Depression, Anxiety, and Stress Scale in a Cohort of Health Professionals.

OBJECTIVES: Considerable research has been undertaken in evaluating the DASS-21 in a variety of clinical populations, but studies of the instrument's psychometric adequacy in healthcare professionals is lacking. This study aimed to establish and improve the construct validity and reliability of the DASS-21 in a cohort of Australian health professionals. METHODS: 343 rehabilitation health professionals completed the DASS-21, along with a demographic questionnaire. Principal components analysis was performed to identify potential factors in the DASS-21. Factors were interpreted against theoretical constructs underlying the instrument. Items loading on separate factors were then subjected to reliability analysis to determine internal consistency of subscales. Items that demonstrated poor fit, or loaded onto more than one factor, were deleted to maximise the reliability of each subscale. RESULTS: Principal components analysis identified three dimensions (depression, anxiety, stress) in a modified version of the DASS-21 (renamed DASS-14), with appropriate construct validity and good reliability (a=0.73 to 0.88). The three dimensions accounted for over 62% of variance between items. CONCLUSION: The modified DASS-14 scale is a more parsimonious measure of depression, anxiety, and stress, with acceptable reliability and construct validity, in rehabilitation health professionals and is appropriate for use in studies of similar populations.

The efficacy and safety of extended-release methylphenidate following traumatic brain injury: a randomised controlled pilot study.

OBJECTIVE: To investigate the feasibility, safety and efficacy of extended-release methylphenidate in enhancing processing speed, complex attentional functioning and everyday attentional behaviour after traumatic brain injury. DESIGN: Seven week randomised, placebo-controlled, double-blind, parallel pilot study. SETTING: Inpatient and outpatient Acquired Brain Injury Rehabilitation Program. PARTICIPANTS: Eleven individuals with reduced processing speed and/or attention deficits following complicated mild to severe traumatic brain injury. INTERVENTIONS: Participants were allocated using a blocked randomisation schedule to receive daily extended-release methylphenidate (Ritalin® LA at a dose of 0.6 mg/kg) or placebo (lactose) in identical capsules. MAIN OUTCOMES: Tests of processing speed and complex attention, and ratings of everyday attentional behaviour were completed at baseline, week 7 (on-drug), week 8 (off-drug) and 9 months follow-up. Vital signs and side effects were monitored from baseline to week 8. RESULTS: Three percent ( n = 11) of individuals screened participated (mean post-traumatic amnesia duration = 63.80 days, SD = 45.15). Results were analysed for six and four individuals on methylphenidate and placebo, respectively. Groups did not differ on attentional test performance or relative/therapist ratings of everyday attentional behaviour. One methylphenidate participant withdrew due to difficulty sleeping. Methylphenidate was associated with trends towards increased blood pressure and reported anxiety. CONCLUSION: Methylphenidate was not associated with enhanced processing speed, attentional functioning or everyday attentional behaviour after traumatic brain injury. Alternative treatments for attention deficits after traumatic brain injury should be explored given the limited feasibility of methylphenidate in this population.

A Screening Tool to Identify Spasticity in Need of Treatment.

OBJECTIVE: To develop a clinically useful patient-reported screening tool for health care providers to identify patients with spasticity in need of treatment regardless of etiology. DESIGN: Eleven spasticity experts participated in a modified Delphi panel and reviewed and revised 2 iterations of a screening tool designed to identify spasticity symptoms and impact on daily function and sleep. Spasticity expert panelists evaluated items pooled from existing questionnaires to gain consensus on the screening tool content. The study also included cognitive interviews of 20 patients with varying spasticity etiologies to determine if the draft screening tool was understandable and relevant to patients with spasticity. RESULTS: The Delphi panel reached an initial consensus on 21 of 47 items for the screening tool and determined that the tool should have no more than 11 to 15 items and a 1-month recall period for symptom and impact items. After 2 rounds of review, 13 items were selected and modified by the expert panelists. Most patients (n = 16 [80%]) completed the cognitive interview and interpreted the items as intended. CONCLUSIONS: Through the use of a Delphi panel and patient interviews, a 13-item spasticity screening tool was developed that will be practical and easy to use in routine clinical practice.

Do existing patient-report activity outcome measures accurately reflect day-to-day arm use following adult traumatic brachial plexus injury?

OBJECTIVE: To identify the range of activities limited following adult traumatic brachial plexus injury and triangulate these with existing patient-reported outcome measures identified from the literature. DESIGN: A qualitative cross-sectional design. SUBJECTS: Adults with traumatic brachial plexus injury and expert clinicians. METHODS: Using an International Classification of Functioning, Disability and Health (ICF) framework, participants identified day-to-day activities that are limited following traumatic brachial plexus injury. Two independent reviewers classified all reported activities into the Comprehensive ICF Core Set of Hand Conditions (CCS-HC) activity domains. Reported activities were triangulated with patient-reported outcome measures identified from the brachial plexus injury literature. RESULTS: Fifty-one participants (21 adults with brachial plexus injury, 30 expert clinicians) generated a total of 522 items. The inter-rater reliability for classification to CCS-HC domains was excellent (k = 0.94, 95% confidence interval (95% CI) 0.92-0.96). Activities reported by patients and clinicians represented all 29 CCS-CH activity domains. Five activities (2%) could not be classified to any ICF domain. Fifteen CCS-HC activity domains were represented in the Disabilities of Arm, Shoulder and Hand (DASH) and ABILHAND, 2 measures currently used in the brachial plexus injury literature. CONCLUSION: Adults with a brachial plexus injury report a range of activities that are limited following injury, and are under-represented in currently used patient-reported outcome measures. The activities reported in this study could be used to inform the development of a new brachial plexus injury targeted questionnaire.

Computer simulation of improvements in hospital length of stay for rehabilitation patients.

OBJECTIVE: To estimate the potential improvement in acute and rehabilitation hospital length of stay for rehabilitation patients from hypothetical scenarios that address barriers to patient flow. DESIGN: Data about the duration of key processes for patients (n = 360) admitted to acute hospitals and subsequently transferred to inpatient rehabilitation in 2 wards in Melbourne, Australia were used to develop a computer simulation model. SUBJECTS: Simulated patients. METHODS: A computer model of length of stay was developed, validation checks performed and alternate care pathways simulated. RESULTS: Almost all scenarios resulted in significant changes in the length of stay compared with baseline. The effect size for the changes was typically small to medium. The duration of the rehabilitation discharge barriers showed significant changes in all hypothetical scenarios. The effect size was smaller when changes were made to a single barrier, but larger when multiple barriers were changed simultaneously. CONCLUSION: Health system modelling can provide information regarding potential improvements in length of stay from addressing barriers to patient flow affecting rehabilitation patients. This can inform reforms to models of care and assist with cost benefit analyses.

Attitudes to obesity among rehabilitation health professionals in Australia.

OBJECTIVE: Negative attitudes toward obese individuals can affect the quality of healthcare and health outcomes. This study examined the attitudes and beliefs of rehabilitation health professionals in Victoria, Australia, toward obesity. Additionally, potential predictors of anti-fat attitudes (or "fat phobia") were explored. METHODS: A cross-sectional, anonymous, self-report survey of rehabilitation health professionals employed in public and private health sectors was performed. Measures included demographic information, attitudes toward obesity, beliefs regarding causes of obesity, and levels of empathy, with associations between variables examined. RESULTS: The cohort demonstrated average levels of fat phobia (3.5 ± SD 0.46), with 4% of respondents exhibiting high levels of anti-fat attitudes. Younger respondents had significantly higher levels of fat phobia than did older staff (p<0.001). Sex, empathy levels, and type of professional or clinical practice area did not correlate with attitudes. Fat phobia was predicted by respondent age and beliefs about causes of obesity, with 20% of variance in attitudes being accounted for. CONCLUSION: Rehabilitation health professionals demonstrate average levels of negative attitudes to obese individuals. Fat phobia is predicted by causal beliefs and the health professional's age. These findings may guide education of health professionals regarding the nature and causes of obesity, in order to improve patient outcomes.

A 66-year-old man with multiple cerebral and cerebellar infarcts due to idiopathic hypereosinophilic syndrome.

A 66-year-old male, who was previously functionally independent, presented with cerebellar ataxia and cognitive impairment following hypereosinophilic syndrome (HES) complicated by multiple strokes. This patient highlights the importance of prompt diagnosis and treatment, and of referring patients with multiple HES-related strokes for multidisciplinary neurological rehabilitation.

A prospective multicentre study of barriers to discharge from inpatient rehabilitation.

OBJECTIVES: To assess the prevalence of and reasons for barriers to discharge from inpatient rehabilitation, to measure the resulting additional days in hospital, and to determine if these were predicted by key demographic or clinical variables. DESIGN, SETTING AND PARTICIPANTS: Prospective open cohort study of 360 patients admitted into two inpatient rehabilitation units in Melbourne over an 8-02 and a 10-02 period in 2008. MAIN OUTCOME MEASURES: Occurrence of discharge barriers, their causes and the duration of unnecessary hospitalisation. RESULTS: There were 360 patients in the study sample, 186 were female (51.7%), and mean age was 58.4 years. Fifty-nine (16.4%) patients had a discharge barrier. The most frequent causes of discharge barriers were patients being non-weight bearing after lower limb fracture, family deliberations about discharge planning, waiting for home modifications and waiting for accommodation. Patients with acquired brain damage and lower limb fracture were the impairment groups most likely to experience a discharge barrier. Over the study period, 21.0% (3152/14 976) of all bed-days were occupied by patients deemed to have a discharge barrier. Regression analysis showed that age, sex, impairment group and dependency level on admission all influenced the occurrence of a discharge barrier. Although regression analysis showed that dependency on admission and age group were significant predictors of additional days in hospital resulting from discharge barriers (P = 0.006), these variables explained only 11% of the additional bed-days. CONCLUSION: Barriers to discharge from inpatient rehabilitation are common and substantial, and they represent an important opportunity for improvement.

Defining barriers to discharge from inpatient rehabilitation, classifying their causes, and proposed performance indicators for rehabilitation patient flow.

There is little research literature on patient flow in rehabilitation. Accepted definitions of barriers to discharge and agreed performance measures are needed to support research and understanding of this topic. The potential of improved patient flow in rehabilitation to assist relieving demand pressures in acute hospitals underscores its importance. This study develops a definition of barriers to discharge from postacute care and classifies their causes using a multiphased iterative consultation and feedback process involving physiatrists, aged-care physicians, and senior nursing and allied health clinicians. Key performance indicators (KPIs) for postacute patient flow are then proposed, the development of which were informed by the available literature and a survey (n=101) of physiatrists, aged-care physicians, and hospital managers with responsibility for patient flow who were questioned about the use of relevant KPIs in this setting. Most (>70%) respondents believed that using KPIs (eg, waiting time from acceptance by postacute care and ready for transfer until admission, percentage of postacute bed days occupied by inpatients with a discharge barrier) to measure aspects of patient flow could improve processes, but few reported collecting this information (45% admission KPIs, 19% discharge KPIs). By using the definition and classification of discharge barriers prospectively to document and address barriers, in conjunction with appropriate KPIs, postacute patient flow and the efficiency of hospital resource utilization can potentially be improved. Our commentary aims to stimulate interest among others to develop a more robust evidence base for improved flow through postacute care.

Inpatient subacute care in Australia: perceptions of admission and discharge barriers.

OBJECTIVE: To determine perceptions of barriers to admission to subacute care from acute hospital care, and barriers to subsequent discharge from subacute care. DESIGN, PARTICIPANTS AND SETTING: Web-based survey of key stakeholders using Likert scales and closed questions. Prompts were emailed repeatedly to potential participants in Australia between 15 May and 24 July 2009. Participants were physicians working in inpatient rehabilitation medicine and aged care units, as well as senior hospital managers with responsibility for patient flow. MAIN OUTCOME MEASURES: Perceived admission and discharge barriers in subacute care. RESULTS: Half of the 101 respondents reported barriers to admission to subacute hospitals as moderate, severe or extreme, and 81% reported a similar grading of severity for barriers to discharge. There was no relationship between these perceptions and whether respondents worked only in the public hospital system (barriers to access: χ² = 0.02 [df = 1; P = 1.0]; and barriers to discharge: χ² = 0.0 [df = 1; P = 1.0]). The most commonly reported barriers to admission were: availability of beds (61% of respondents); physical, environmental and equipment inadequacies (62% of respondents); and allied health or nursing staff issues (55% of respondents). The most commonly reported barriers to discharge included: waiting for a more appropriate setting of care (76% of respondents) and funding for home modifications, equipment or carers (55% of respondents). There was no relationship between respondents' position and their reporting of various admission (χ² = 6.2; df = 8; P = 0.6) or discharge barriers (χ² = 13.8; df = 12; P = 0.3). CONCLUSION: There is a strong perception among key stakeholders in subacute care that there are major barriers to patient admission and discharge. Redistributing proposed funding for inpatient subacute beds to measures for overcoming these barriers is likely to improve patient flow though the whole hospital system.