Responsiveness and predictability of gait speed and other disability measures in acute stroke

Does physiotherapy based on the Bobath concept, in conjunction with a task practice, achieve greater improvement in walking ability in people with stroke compared to physiotherapy focused on structured task practice alone? A pilot randomized controlled trial

Objective: To compare the short-term effects of two physiotherapy approaches for improving ability to walk in different environments following stroke: (i) interventions based on the Bobath concept, in conjunction with task practice, compared to (ii) structured task practice alone.

Design: Randomized controlled trial.

Setting: Two rehabilitation centres

Participants: Twenty-six participants between four and 20 weeks post-stroke, able to walk with supervision indoors.

Interventions: Both groups received six one-hour physiotherapy sessions over a two-week period. One group received physiotherapy based on the Bobath concept, including one hour of structured task practice. The other group received six hours of structured task practice.

Outcome measures: The primary outcome was an adapted six-minute walk test, incorporating a step, ramp and uneven surface. Secondary measures were gait velocity and the Berg Balance Scale. Measures were assessed before and after the intervention period.

Results: Following the intervention, there was no significant difference in improvement between the two groups for the adapted six-minute walk test (89.9 (standard deviation (SD) 73.1) m Bobath versus 41 (40.7) m task practice, P = 0.07). However, walking velocity showed significantly greater increases in the Bobath group (26.2 (SD 17.2) m/min versus 9.9 (SD  = 12.9) m/min, P = 0.01). No significant differences between groups were recorded for the Berg Balance Scale ( P = 0.2).

Conclusion: This pilot study indicates short-term benefit for using interventions based on the Bobath concept for improving walking velocity in people with stroke. A sample size of 32 participants per group is required for a definitive study.

Clinical measurement of walking balance in people post stroke: a systematic review

OBJECTIVE

To identify walking balance measures which have been established for use with ambulatory people post stroke and reflect the balance requirements of community walking.

DATA SOURCES

MEDLINE, Embase, AMED.

REVIEW METHODS

Measures reflecting walking balance, with tasks that include a stepping action in standing, used with people post stroke were reviewed. Measures with clinical utility were evaluated for psychometric properties, including reliability, validity and clinical interpretation.

RESULTS

Nine measures (24 papers) were identified that met the requirement of measuring walking balance in people post stroke with demonstrated clinical utility. Outcome measures with multiple tasks (Brunel Balance Assessment, Modified Emory Functional Ambulation Profile, Dynamic Gait Index, Community Balance and Mobility Scale, and mini-Balance Evaluation Systems Test) as opposed to single task measures (Step Test, Side Step Test and Four Square Step Test, Timed Up and Go), reflect a broader range of walking balance required to accommodate the variable challenges which may be expected at the community level of walking. Most tools report excellent reliability when used by physiotherapists. Validity remains far more challenging to establish. Evaluation of clinical interpretation is limited for all measures.

CONCLUSION

The multiple-task outcome measures reviewed reflected walking balance activities often undertaken during community mobility. Single-task measures may be useful as screening measures, identifying walking balance deficits associated with basic/lower levels of walking balance. Construct validity and clinical interpretability of each measure in ambulatory people post stroke requires further research to identify the level of community mobility represented by each measure of walking balance.

Arm movement improves performance in clinical balance and mobility tests

Previous studies have suggested that arm movements can contribute to preventing the loss of balance or falls, and that aging affects the functions of arm movements. Clinical balance and mobility tests may be able to detect such aging effects. As the first step to approaching this question, the purpose of this pilot study was to investigate the effects of arm movements on the performance of clinical balance and mobility tests. Ten participants were evaluated in four clinical tests: (1) Maximal Step Length Test (MST), (2) Step Test (ST), (3) Timed Up and Go Test (TUG), and (4) Walk along an Elliptical Line (WEL). Each test was performed with free and limited arm movement and the outcomes were compared. Statistical analysis indicated a significant improvement in test performance when arms were used freely for three out of four tests (MST, ST and TUG), with inconclusive results on WEL. This pilot study showed improved performance on the clinical balance and mobility tests, suggesting that the contribution of arm movements is sufficiently large to be detected. This implies a feasibility for novel usage of clinical balance and mobility tests, i.e., to test the effectiveness of arm usage in balance and mobility.

The effects of dynamic ankle-foot orthoses in chronic stroke patients at three-month follow-up: a randomized controlled trial

Objective: To investigate the short- and long-term effects of dynamic ankle foot orthoses on functional ambulation activities in chronic hemiparetic patients.

Design: Randomized controlled trial.

Setting: University’s neurological rehabilitation outpatient clinic and orthotics department.

Subjects: Twenty-eight chronic hemiparetic patients of level 3–5 according to Functional Ambulation Classification and with a maximum spasticity level of 3 according to Modified Ashworth Scale, were randomly assigned to the study and control groups.

Interventions: The control group (n = 14) was assessed with tennis shoes whereas the study group (n = 14) was assessed initially with tennis shoes and after three months with dynamic ankle foot orthosis.

Measures: Functional Reach, Timed Up and Go, Timed Up Stairs, Timed Down Stairs, gait velocity and Physiological Cost Index.

Results: In the initial assessment no difference was found between the groups for any of the measured parameters (P > 0.05). After three months, intergroup comparisons while the patients in the study group were wearing dynamic ankle-foot orthosis showed a significant difference in favour of the study group for Timed Up Stairs 12.00 (10.21) seconds study versus 15.00 (7.29) seconds control group; for gait velocity 0.99 (0.45) m/s study versus 0.72 (0.20) m/s control group and for Physiological Cost Index 0.12 (0.06) beats/min study versus 0.28 (0.13) beats/min control group (P < 0.05). No difference was found between the groups for Functional Reach, Timed Up and Go, Timed Down Stairs (P > 0.05).

Conclusion: Chronic hemiparetic patients may benefit from using dynamic ankle-foot orthosis.

Feasibility and effectiveness of circuit training in acute stroke rehabilitation

BACKGROUND

Task-specificity, repetition and progression are key variables in the acquisition of motor skill however they have not been consistently implemented in post-stroke rehabilitation.

OBJECTIVE

To evaluate the effectiveness of a stroke rehabilitation plan of care that incorporated task-specific practice, repetition and progression to facilitate functional gain compared to standard physical therapy for individuals admitted to an inpatient stroke unit.

METHODS

Individuals participated in either a circuit training (CTPT) model (n = 72) or a standard (SPT) model (n = 108) of physical therapy, 5 days/week. Each 60 minute circuit training session, delivered according to severity level, consisted of four functional mobility tasks. Daily exercise logs documented both task repetition and progression.

RESULTS

The CTPT model was successfully implemented in an acute rehabilitation setting. The CTPT group showed a significantly greater improved change in gait speed from hospital admission to discharge than the SPT group (0.21 ± 0.25 m/sec vs. 0.13 ± 0.22 m/sec; p = 0.03). The difference between groups occurred primarily among those who were ambulatory upon admission. There were no significant differences between the two cohorts at 90 days post-stroke as measured by the FONE-FIM, SF-36 and living location.

CONCLUSIONS

Therapy focused on systematically progressed functional tasks can be successfully implemented in an inpatient rehabilitation stroke program. This circuit-training model resulted in greater gains in gait velocity over the course of inpatient rehabilitation compared to the standard model of care. Community-based services following hospital discharge to maintain these gains should be included in the continuum of post-stroke care.

The Modified Rivermead Mobility Index: reliability and convergent validity in a mixed neurological population

PURPOSE

To assess the inter-rater reliability, internal consistency and convergent validity of the Modified Rivermead Mobility Index (MRMI) in a mixed neurological population.

METHOD

The MRMI was scored for 30 consecutive patients (mean age 54.5+/-15.6 years) by two individual testers. Reliability was examined using intraclass correlation coefficients (ICC3,1) and Bland and Altman plots; internal consistency reliability using Cronbach's alpha (alpha) and convergent validity using Spearman's correlation coefficient (rho) test to compare the MRMI to the 10-m walk test as a gold standard of mobility. As the majority of patients had bilateral deficits, the MRMI was measured and added independently for both sides.

RESULTS

The inter-rater reliability was excellent: ICC (95% CI)=0.93(0.86, 0.96). The Bland and Altman plots contained most data points and there was perfect agreement between raters bilaterally in 27% of cases, with a difference of one point in 60% of cases on the left and 63% of cases on the right. Internal consistency was good at alpha=0.72 (Rater 1) and 0.80 (Rater 2). The Spearman rho between MRMI and the 10-m walk test was high at 0.86.

CONCLUSIONS

The MRMI was shown to have high levels of reliability in a mixed neurological population but we recommend that its psychometric properties are further investigated to establish the true clinical utility of this measure.

Comparação entre indivíduos hemiparéticos com e sem histórico de quedas com base nos componentes da Classificação Internacional de Funcionalidade, Incapacidade e Saúde

O objetivo deste estudo foi comparar hemiparéticos com e sem histórico de quedas nos últimos seis meses (caidores e não-caidores) segundo os componentes da Classificação Internacional de Funcionalidade, Incapacidade e Saúde. Dezesseis hemiparéticos não-caidores (62,3±16,6 anos), com tempo de acidente vascular encefálico (AVE) de 38,0±48,3 meses, e 16 caidores (61,0±17,0 anos), tempo de AVE de 48,0±50,7 meses, de ambos os sexos, comunitários e deambuladores, foram avaliados quanto a funções e estruturas do corpo (torque do músculo quadríceps do lado parético e escala de depressão geriátrica), atividade - velocidade de marcha (VM) natural e máxima, teste de levantar e caminhar cronometrado (timed up & go) e escala de equilíbrio de Berg - e participação (pelo perfil de saúde de Nottingham e escala de qualidade de vida específica para AVE). Os dados foram tratados estatisticamente, com nível de significância α<0,05. Não houve diferença significativa entre os grupos quanto à idade, sexo e tempo de AVE (0,56<p<0,82), nem quanto às demais caracteristicas medidas (torque, depressão, VM, equilíbrio e qualidade de vida (0,12<p<0,60). Portanto, hemiparéticos caidores apresentaram-se semelhantes aos não-caidores nos domínios funções e estruturas do corpo, atividades e participação. Fatores contextuais ambientais, não analisados, podem estar mais relacionados a episódio(s) de queda nesses indivíduos.

Recovery of the Sit-to-Stand Movement After Stroke: A Longitudinal Cohort Study

Background and Objective . To present quantitative data on sit-to-stand (STS)-related functioning and recovery during the first year after stroke. STS-related functioning was used to evaluate independent STS movement, rising speed, and actual STS performance during normal daily life. Methods. This was a prospective cohort study of 50 patients poststroke. Assessments were made at 0, 3, 6, 9, 12, 24, and 48 weeks poststroke. Actual STS performance was assessed at 0, 12, and 48 weeks. The main outcome measures were the following: ability to rise independently, rising speed (power chair stand up), number of STS movements, percentage of time walking and standing during daily life (using an activity monitor), and clinical outcomes, measured among others by the Barthel index (BI). Results. During year 1, the percentage of patients able to rise increased from 54% to 83%. Most improvements occurred during weeks 0 to 12, whereas no significant changes were observed during weeks 12 to 24. Rising speed similarly increased from 0.15 to 0.26 s− 1 during weeks 0 to 12 and to 0.30 s−1 at week 48. Gait speed and BI also significantly increased. The number of STS movements increased significantly during weeks 0 to 12 (from 10.6 to 17.7) but not during weeks 12 to 48. Conclusions. STS-related functioning improved significantly in the first year after stroke, with the most improvement occurring during the first 12 weeks. After 12 weeks, rising speed, gait speed, and BI continue to improve.

Circuit class therapy for improving mobility after stroke

BACKGROUND

Circuit class therapy (CCT) offers a supervised group forum for people after stroke to practise tasks, enabling increased practise time without increasing staffing.

OBJECTIVES

To examine the effectiveness and safety of CCT on mobility in adults with stroke.

SEARCH STRATEGY

We searched the Cochrane Stroke Group Trials Register (last searched October 2009), the Cochrane Central Register of Controlled Trials (CENTRAL) (The Cochrane Library, Issue 2, 2009), MEDLINE (1950 to November 2008), EMBASE (1980 to November 2008), CINAHL (1982 to November 2008) and 14 other electronic databases (to November 2008). We also searched proceedings from relevant conferences, reference lists and unpublished theses; contacted authors of published trials and other experts in the field; and searched relevant clinical trials and research registers.

SELECTION CRITERIA

Randomised or quasi-randomised controlled trials including people over 18 years old diagnosed with stroke of any severity, at any stage, or in any setting, receiving CCT.

DATA COLLECTION AND ANALYSIS

Two review authors independently selected trials for inclusion, assessed methodological quality and extracted data.

MAIN RESULTS

We included six trials involving 292 participants. Participants were long-term stroke survivors living in the community or receiving inpatient rehabilitation. All could walk 10 metres with or without assistance. Four studies measured walking capacity and three measured gait speed, demonstrating that CCT was superior to the comparison intervention (Six Minute Walk Test: mean difference (MD), fixed 76.57 metres, 95% confidence interval (CI) 38.44 to 114.70, P < 0.0001; gait speed: MD, fixed 0.12 m/s, 95% CI 0.00 to 0.24, P = 004). Two studies measured balance, showing a superior effect in favour of CCT (Step Test: MD, fixed 3.00 steps, 95% CI 0.08 to 5.91, P = 0.04; activities-specific balance and confidence: MD, fixed 7.76, 95% CI 0.66 to 14.87, P = 0.03). Studies also measured other balance items showing no difference in effect. Length of stay (two studies) showed a significant effect in favour of CCT (MD, fixed -19.73 days, 95% CI -35.43 to -4.04, P = 0.01). Only two studies measured adverse events (falls during therapy): all were minor.

AUTHORS' CONCLUSIONS

CCT is safe and effective in improving mobility for people after moderate stroke and may reduce inpatient length of stay. Further research is required, investigating quality of life, participation and cost-benefits, that compares CCT to standard care and that also investigates the differential effects of stroke severity, latency and age.

Geriatric rehabilitation of stroke patients in nursing homes: a study protocol

BACKGROUND

Geriatric patients are typically underrepresented in studies on the functional outcome of rehabilitation after stroke. Moreover, most geriatric stroke patients do probably not participate in intensive rehabilitation programs as offered by rehabilitation centers. As a result, very few studies have described the successfulness of geriatric stroke rehabilitation in nursing home patients, although it appears that the majority of these patients are being discharged back to the community, rather than being transferred to residential care. Nevertheless, factors associated with the successfulness of stroke rehabilitation in nursing homes or skilled nursing facilities are largely unknown. The primary goal of this study is, therefore, to assess the factors that uniquely contribute to the successfulness of rehabilitation in geriatric stroke patients that undergo rehabilitation in nursing homes. A secondary goal is to investigate whether these factors are similar to those associated with the outcome of stroke rehabilitation in the literature.

METHODS/DESIGN

This study is part of the Geriatric Rehabilitation in AMPutation and Stroke (GRAMPS) study in the Netherlands. It is a longitudinal, observational, multicenter study in 15 nursing homes in the Southern part of the Netherlands that aims to include at least 200 patients. All participating nursing homes are selected based on the existence of a specialized rehabilitation unit and the provision of dedicated multidisciplinary care. Patient characteristics, disease characteristics, functional status, cognition, behavior, and caregiver information, are collected within two weeks after admission to the nursing home. The first follow-up is at discharge from the nursing home or one year after inclusion, and focuses on functional status and behavior. Successful rehabilitation is defined as discharge from the nursing home to an independent living situation within one year after admission. The second follow-up is three months after discharge in patients who rehabilitated successfully, and assesses functional status, behavior, and quality of life. All instruments used in this study have shown to be valid and reliable in rehabilitation research or are recommended by the Netherlands Heart Foundation guidelines for stroke rehabilitation.Data will be analyzed using SPSS 16.0. Besides descriptive analyses, both univariate and multivariate analyses will be performed with the purpose of identifying associated factors as well as their unique contribution to determining successful rehabilitation.

DISCUSSION

This study will provide more information about geriatric stroke rehabilitation in Dutch nursing homes. To our knowledge, this is the first large study that focuses on the determinants of success of geriatric stroke rehabilitation in nursing home patients.

Resting interhemispheric functional magnetic resonance imaging connectivity predicts performance after stroke

OBJECTIVE

Focal brain lesions can have important remote effects on the function of distant brain regions. The resulting network dysfunction may contribute significantly to behavioral deficits observed after stroke. This study investigates the behavioral significance of changes in the coherence of spontaneous activity in distributed networks after stroke by measuring resting state functional connectivity (FC) using functional magnetic resonance imaging.

METHODS

In acute stroke patients, we measured FC in a dorsal attention network and an arm somatomotor network, and determined the correlation of FC with performance obtained in a separate session on tests of attention and motor function. In particular, we compared the behavioral correlation with intrahemispheric FC to the behavioral correlation with interhemispheric FC.

RESULTS

In the attention network, disruption of interhemispheric FC was significantly correlated with abnormal detection of visual stimuli (Pearson r with field effect = -0.624, p = 0.002). In the somatomotor network, disruption of interhemispheric FC was significantly correlated with upper extremity impairment (Pearson r with contralesional Action Research Arm Test = 0.527, p = 0.036). In contrast, intrahemispheric FC within the normal or damaged hemispheres was not correlated with performance in either network. Quantitative lesion analysis demonstrated that our results could not be explained by structural damage alone.

INTERPRETATION

These results suggest that lesions cause state changes in the spontaneous functional architecture of the brain, and constrain behavioral output. Clinically, these results validate using FC for assessing the health of brain networks, with implications for prognosis and recovery from stroke, and underscore the importance of interhemispheric interactions.

Measures of activity limitation on admission to rehabilitation after stroke predict walking speed at discharge: an observational study

QUESTION

Which measures of activity limitation on admission to rehabilitation after stroke best predict walking speed at discharge?

DESIGN

Prospective observational study.

PARTICIPANTS

120 people with stroke undergoing inpatient rehabilitation.

OUTCOME MEASURES

Predictors were admission walking speed, Timed Up and Go, Motor Assessment Scale, Modified Elderly Mobility Scale, and Functional Independence Measure scores measured on admission to rehabilitation. The outcome of interest was walking speed at discharge from inpatient rehabilitation.

RESULTS

Admission walking speed (B 0.47, 95% CI 0.27 to 0.67) and Item 2 of the Motor Assessment Scale, ie, moving from supine lying to sitting over the side of a bed (B 0.05, 95% CI 0.01 to 0.09) predicted walking speed on discharge from rehabilitation. These two predictors explained 36% of the variance in discharge walking speed.

CONCLUSION

Walking speed at discharge from inpatient rehabilitation was best predicted by admission walking speed and Motor Assessment Scale Item 2.

Meaningful gait speed improvement during the first 60 days poststroke: minimal clinically important difference

BACKGROUND

When people with stroke recover gait speed, they report improved function and reduced disability. However, the minimal amount of change in gait speed that is clinically meaningful and associated with an important difference in function for people poststroke has not been determined.

OBJECTIVE

The purpose of this study was to determine the minimal clinically important difference (MCID) for comfortable gait speed (CGS) associated with an improvement in the modified Rankin Scale (mRS) score for people between 20 to 60 days poststroke.

DESIGN

This was a prospective, longitudinal, cohort study.

METHODS

The participants in this study were 283 people with first-time stroke prospectively enrolled in the ongoing Locomotor Experience Applied Post Stroke (LEAPS) multi-site randomized clinical trial. Comfortable gait speed was measured and mRS scores were obtained at 20 and 60 days poststroke. Improvement of >or=1 on the mRS was used to detect meaningful change in disability level.

RESULTS

Mean (SD) CGS was 0.18 (0.16) m/s at 20 days and 0.39 (0.22) m/s at 60 days poststroke. Among all participants, 47.3% experienced an improvement in disability level >or=1. The MCID was estimated as an improvement in CGS of 0.16 m/s anchored to the mRS.

LIMITATIONS

Because the mRS is not a gait-specific measure of disability, the estimated MCID for CGS was only 73.9% sensitive and 57.0% specific for detecting improvement in mRS scores.

CONCLUSIONS

We estimate that the MCID for gait speed among patients with subacute stroke and severe gait speed impairments is 0.16 m/s. Patients with subacute stroke who increase gait speed >or=0.16 m/s are more likely to experience a meaningful improvement in disability level than those who do not. Clinicians can use this reference value to develop goals and interpret progress in patients with subacute stroke.

Case management poststroke did not induce response shift: the value of residuals

OBJECTIVES

To estimate the extent to which different methods of assessing response shift lead to different conclusions about its presence.

STUDY DESIGN AND SETTING

A reanalysis of a randomized clinical trial involving 190 persons poststroke to evaluate the effectiveness of a case management intervention aimed at assisting persons with stroke to make the transition from acute care to home.

RESULTS

Response shift was found to be nondifferential across groups and was therefore ruled out as an explanation for why the case management intervention showed no impact on patients' perceptions of their health. The results of a then-test did not show differential recalibration overtime. Factor analysis did not support reconceptualization response shift in either group but did find weak evidence for reprioritization response shift. An analysis of residuals indicated that approximately 50% of study subjects in each group experienced response shift that is probably close to reconceptualization.

CONCLUSION

A framework for assessing response shift was proposed and investigators planning trials of interventions targeting patient-reported outcomes should build into the trial methods for response shift investigation. In trials of interventions likely to induce response shift, before concluding about intervention-induced change, response shift should be ruled out by using a combination of design and statistical approaches.

IMPAIRED VISUO-MOTOR SKILLS IN THE UNAFFECTED LOWER LIMB OF PATIENTS WITH STROKE

To study the motor skills of the unaffected lower limb of patients with stroke, the visuo-motor skills of the unaffected lower limb in patients with stroke was compared with those in healthy control subjects using a computerized motor skill analyzer that calculated the accuracy in the tracking task in terms of lap time and trajectory error. Trajectory errors in the task by the unaffected lower limb in the patients with stroke were significantly greater than those in the lower limb of healthy control subjects. These results suggest that patients with stroke have impaired visuo-motor skills of the unaffected lower limb.

Measures of physical ability are unrelated to objectively measured physical activity behavior in older adults residing in continuing care retirement communities

OBJECTIVE

To explore the relationship between measures of physical performance, physical activity, and self-reported physical activity.

DESIGN

Cross-sectional analysis.

SETTING

Continuing care retirement communities (CCRCs) in the greater Milwaukee area.

PARTICIPANTS

Older adults from independent or assisted living apartments (N=59).

INTERVENTIONS

Not applicable.

MAIN OUTCOME MEASURES

Physical performance was measured with comfortable and fast gait speeds and the six-minute walk test. Physical activity was measured by an ankle-mounted accelerometer to observe daily steps; stepping rate was averaged over a 7-day wear time. Self-reported physical activity was measured by the Physical Activity Scale for the Elderly (PASE).

RESULTS

Participants reported walking more steps per day than older adults who are not living in CCRCs. There was no relationship between physical abilities and total steps walked (r=.087-.213, P>.05). No relationship was observed between measures of physical performance or total steps and PASE scores (r=-.034-.177, P = not significant). The relative contributions of physical activity categories to total PASE score were different than published reports for older adults not living in CCRCs.

CONCLUSIONS

Common measures of physical performance often used by clinicians in making decisions on rehabilitation outcomes do not appear to be related to the actual functioning of older adults residing in senior communities. The nature of the environment customized to the needs of the older adult may facilitate increased physical activity participation independent of physical abilities.

Neuroprosthesis peroneal functional electrical stimulation in the acute inpatient rehabilitation setting: a case series

BACKGROUND AND PURPOSE

Studies have suggested that peroneal nerve functional electrical stimulation (peroneal FES) during walking improves gait in patients with chronic stroke. The effect of peroneal FES during the acute stages of stroke recovery is not known. The purposes of this case report are: (1) to describe differences between walking with and without a neuroprosthesis during the first few weeks after stroke, (2) to offer a clinical perspective on decision making for the use of peroneal FES during acute rehabilitation, and (3) to determine the feasibility of rehabilitation with peroneal FES neuroprostheses during the acute phases of stroke recovery.

CASE DESCRIPTION

This case report describes 2 patients with different clinical presentations but both receiving inpatient rehabilitation less than 2 weeks after stroke. Each patient received peroneal FES via a neuroprothesis as tolerated while gait training in therapy.

OUTCOMES

One patient immediately increased gait speed (128%) and decreased time to perform the Timed "Up & Go" Test (40%) using the neuroprothesis. Both patients immediately increased the 6-Minute Walk Test distance using the neuroprothesis (121% and 101%). The patient who underwent testing with the instrumented walking system also demonstrated improved gait symmetry. After 1 to 3 weeks of using the neuroprothesis, the difference between outcomes with and without the neuroprothesis decreased.

DISCUSSION

It is possible that peroneal FES delivered through a neuroprosthesis during acute stroke recovery may improve gait outcomes. Research is needed to determine proper duration and timing.

Multicenter Randomized Clinical Trial Evaluating the Effectiveness of the Lokomat in Subacute Stroke

Objective. To compare the efficacy of robotic-assisted gait training with the Lokomat to conventional gait training in individuals with subacute stroke. Methods. A total of 63 participants <6 months poststroke with an initial walking speed between 0.1 to 0.6 m/s completed the multicenter, randomized clinical trial. All participants received twenty-four 1-hour sessions of either Lokomat or conventional gait training. Outcome measures were evaluated prior to training, after 12 and 24 sessions, and at a 3-month follow-up exam. Self-selected overground walking speed and distance walked in 6 minutes were the primary outcome measures, whereas secondary outcome measures included balance, mobility and function, cadence and symmetry, level of disability, and quality of life measures. Results. Participants who received conventional gait training experienced significantly greater gains in walking speed ( P = .002) and distance ( P = .03) than those trained on the Lokomat. These differences were maintained at the 3-month follow-up evaluation. Secondary measures were not different between the 2 groups, although a 2-fold greater improvement in cadence was observed in the conventional versus Lokomat group. Conclusions. For subacute stroke participants with moderate to severe gait impairments, the diversity of conventional gait training interventions appears to be more effective than robotic-assisted gait training for facilitating returns in walking ability.

Assessing walking speed in clinical research: a systematic review

OBJECTIVE

To provide a systematic review and describe how assessments of walking speed are reported in the health care literature.

METHODS

MEDLINE electronic database and bibliographies of select articles were searched for terms describing walking speed and distances walked. The search was limited to English language journals from 1996 to 2006. The initial title search yielded 793 articles. A review of the abstracts reduced the number to 154 articles. Of these, 108 provided sufficient information for inclusion in the current review.

RESULTS

Of the 108 studies included in the review 61 were descriptive, 39 intervention and 8 randomized controlled trials. Neurological (n=55) and geriatric (n=27) were the two most frequent participant groups in the studies reviewed. Instruction to walk at a usual or normal speed was reported in 55 of the studies, while 31 studies did not describe speed instructions. A static (standing) start was slightly more common than a dynamic (rolling) start (30 vs 26 studies); however, half of the studies did not describe the starting protocol. Walking 10, 6 and 4 m was the most common distances used, and reported in 37, 20 and 11 studies respectively. Only four studies included information on whether verbal encouragement was given during the walking task.

CONCLUSIONS

Tests of walking speed have been used in a wide range of populations. However, methodologies and descriptions of walking tests vary widely from study to study, which makes comparison difficult. There is a need to find consensus for a standardized walking test methodology.

Test-retest reliability and minimal detectable change of gait speed in individuals undergoing rehabilitation after stroke

BACKGROUND AND PURPOSE

Gait speed is commonly used to assess walking ability in persons with stroke. Previous research related to the psychometric properties of gait speed has been conducted primarily with individuals who were able to walk independently and/or were in the later stages of recovery after stroke. The purpose of this research was to examine the test-retest reliability and minimal detectable change (MDC90) of gait speed in individuals with stroke who required varying levels of assistance to ambulate during rehabilitation.

METHODS

Patients who could ambulate with or without physical assistance and were undergoing inpatient rehabilitation were recruited. Gait speed was measured over the middle five meters of a nine-meter walk at a comfortable pace. Data were analyzed using the intraclass correlation coefficient (ICC2,1) and the MDC90.

RESULTS

Thirty-five patients who were a mean 34.5 (standard deviation = 17.7) days post-stroke agreed to participate. For all the subjects combined, the ICC2,1 was 0.862 and MDC90 was 0.30 m/sec. For the 13 subjects who required physical assistance to walk, the ICC2,1 = 0.971 and MDC90 = 0.07 m/sec. For the 22 subjects who could walk without physical assistance, the ICC2,1 = 0.80 and MDC90 = 0.36 m/sec.

DISCUSSION

Gait speed is a reliable measure of walking ability for a wide variety of patients undergoing rehabilitation after stroke. Gait speed is more sensitive to change in patients who require physical assistance to walk than in those who can walk without assistance. A change of more than 0.30 m/sec may be necessary in order to determine whether a change in gait speed exceeds measurement error and patient variability.

Relationship between test methodology and mean velocity in timed walk tests: a review

OBJECTIVE

To assess the degree to which test methodology affects outcomes in clinical evaluations of walking speed.

DATA SOURCES

Medline database and reference lists from relevant articles.

STUDY SELECTION

We conducted electronic searches by using various combinations of terms related to clinical evaluations of walking speed. Resultant abstracts were then reviewed, and the methods and results section of promising full-text articles were searched for detailed descriptions of walk-test methodologies and results. Ultimately, articles were limited to the most common participant groups, older adults (aged) and individuals with neurologic conditions (neuro). The final sample included 46 studies.

DATA EXTRACTION

Three aspects of test methodology (pace, starting protocol, distance timed) were extracted for use as independent variables. Group mean age was extracted for use as a covariate. Group mean velocity was extracted for use as the dependent variable. Data were extracted by a single investigator.

DATA SYNTHESIS

Usual and/or comfortable pace was reported nearly twice as often as fast pace in both groups. Static-start protocols were more frequently used in aged studies, whereas dynamic (ie, rolling) starts were more common in neuro studies. Distances of 6 and 10m were most common in aged and neuro studies, respectively. Multivariate analyses (analysis of covariance) showed that only pace was significantly related to the mean velocity in both groups (aged: pace, P<.01; starting protocol, P=.21; distance, P=.05; neuro: pace, P=.01; starting protocol, P=.63; distance, P=.49). However, methodology-related differences in the distribution (95% confidence intervals) of performance scores across certain clinical standards were noted within all 3 methodology variables.

CONCLUSIONS

Clinical assessments of walking velocity are not conducted uniformly. Common methodologic factors may influence the clinical interpretation of walk performances. Universal walk-test methodology is warranted to improve intergroup comparisons and the development of useful clinical criteria and consensus norms.

Usefulness of the Berg Balance Scale in stroke rehabilitation: a systematic review

BACKGROUND

In a recent study of 655 physical therapists working with a stroke population, the Berg Balance Scale (BBS) was identified as the most commonly used assessment tool across the continuum of stroke rehabilitation. Given the widespread popularity of the BBS, it is important to critically appraise the BBS for its use with a stroke population.

OBJECTIVE

The purposes of this study were to conduct a systematic review of the psychometric properties of the BBS specific to stroke and to identify strengths and weaknesses in its usefulness for stroke rehabilitation.

RESULTS

Twenty-one studies examining the psychometric properties of the BBS with a stroke population were retrieved. Internal consistency was excellent (Cronbach alpha=.92-.98) as was interrater reliability (intraclass correlation coefficients [ICCs]=.95-.98), intrarater reliability (ICC=.97), and test-retest reliability (ICC=.98). Sixteen studies focused on validity and generally found excellent correlations with the Barthel Index, the Postural Assessment Scale for Stroke Patients, Functional Reach Test, the balance subscale of Fugl-Meyer Assessment, the Functional Independence Measure, the Rivermead Mobility Index (except for weight shift and step-up items), and gait speed. Berg Balance Scale scores predicted length of stay, discharge destination, motor ability at 180 days poststroke, and disability level at 90 days, but these scores were not predictive of falls. Eight studies focused on responsiveness; all reported moderate to excellent sensitivity. Three studies found floor or ceiling effects.

DISCUSSION AND CONCLUSION

The BBS is a psychometrically sound measure of balance impairment for use in poststroke assessment. Given the floor and ceiling effects, clinicians may want to use the BBS in conjunction with other balance measures.

How feasible is the attainment of community ambulation after stroke? A pilot randomized controlled trial to evaluate community-based physiotherapy in subacute stroke

Objective: This pilot randomized controlled trial evaluated an assistant-led, community-based intervention to improve community mobility and participation after stroke, and examined the potential for independent community ambulation in people with subacute stroke who present with moderate gait deficit.

Design: A multicentre, pilot randomized controlled trial.

Setting: Three hospitals and three community settings in New Zealand.

Subjects: Thirty post-acute, home-dwelling stroke survivors were randomly allocated to receive intervention in the community (n = 14) or as hospital outpatients (n = 16) twice a week for seven weeks.

Interventions: The community intervention involved practice of functional gait activities in community environments relevant to each participant. Hospital-based physiotherapy was based upon a Motor Relearning approach.

Main measures: The primary outcome measure was gait speed (m/min). Secondary outcomes included endurance (six-minute walk time), Activities-specific Confidence Balance Scale, and the Subjective Index of Physical and Social Outcomes measured at baseline, post intervention and six months.

Results: Large gains in gait speed were obtained for participants in both groups: community group mean (SD) 16 (16.1) m/min; physiotherapy group mean (SD) 15.9 (16.1) m/min, maintained at six months. There were no significant differences between groups for primary and secondary outcomes after treatment (P = 0.86 ANOVA) or at six months (P = 0.83 ANOVA). Only 11 participants reported independent community ambulation. Levels of social integration were low to moderate.

Conclusions: A community-based gait recovery programme appears a practicable alternative to routine physiotherapy, however independent community ambulation is a challenging rehabilitation goal.

Predictive Validity and Responsiveness of the Functional Ambulation Category in Hemiparetic Patients After Stroke

OBJECTIVE

To determine the reliability, concurrent and predictive validity, and responsiveness of the Functional Ambulation Category (FAC) in hemiparetic patients after stroke.

DESIGN

Prospective cohort.

SETTING

An early rehabilitation center for patients with neurologic disorders.

PARTICIPANTS

Fifty-five nonambulatory patients after first-ever stroke, with duration of illness between 30 and 60 days, were included.

INTERVENTIONS

Not applicable.

MAIN OUTCOME MEASURES

FAC, Rivermead Mobility Index (RMI), walking velocity, step length, and six-minute walking test (6MWT) were assessed at the beginning, after 2 and 4 weeks of rehabilitation, and again 6 months later. After 6 months, community ambulation was also assessed. Test-retest and interrater reliability, concurrent, discriminant, and predictive validity and responsiveness of the FAC were calculated.

RESULTS

Based on video examinations, high test-retest reliability (Cohen kappa=.950) and interrater reliability (kappa=.905) were found. FAC scores at the beginning and after 2 weeks, 3 weeks, and 6 months correlated highly with the RMI (Spearman rho=.686, rho=.787, rho=.825, rho=.893, respectively), distance walked in the 6MWT (rho=.949, rho=.937, rho=.931, rho=.906, respectively), walking velocity (rho=.952, rho=.939, rho=.902, rho=.901, respectively), and step length (rho=.952, rho=.932, rho=.896, rho=.877, respectively) at the same time points (all P<.001). The RMI, walking velocity, step length, and distance walked in the 6MWT differed for each FAC category (P<.001). After 4 weeks of rehabilitation, an FAC score of 4 or higher predicted community ambulation at 6 months with 100% sensitivity and 78% specificity. FAC scores changed significantly between the first 2 and second 2 weeks (Wilcoxon z=8.7, z=7.9, respectively; both P<.001) of the inpatient rehabilitation program.

CONCLUSIONS

The FAC has excellent reliability, good concurrent and predictive validity, and good responsiveness in patients with hemiparesis after stroke.

Dual-Task Exercise Improves Walking Ability in Chronic Stroke: A Randomized Controlled Trial

OBJECTIVE

To examine the effectiveness of a dual-task-based exercise program on walking ability in subjects with chronic stroke.

DESIGN

Single-blind randomized controlled trial.

SETTING

General community.

PARTICIPANTS

Twenty-five subjects with chronic stroke who were at least limited community ambulatory subjects (a minimum gait velocity, 58cm/s).

INTERVENTIONS

Participants were randomized into a control group (n=12) or experimental group (n=13). Subjects in the control group did not receive any rehabilitation training. Subjects in the experimental group underwent a 4-week ball exercise program.

MAIN OUTCOME MEASURES

Gait performance was measured under single task (preferred walking) and tray-carrying task. Gait parameters of interest were walking speed, cadence, stride time, stride length, and temporal symmetry index.

RESULTS

The experimental group showed significant improvement in all selected gait measures except for temporal symmetry index under both task conditions. In the control group, there were no significant changes over the 4-week period for all selected measures. There was a significant difference between groups for all selected gait variables except for temporal symmetry index under both task conditions.

CONCLUSIONS

The dual-task-based exercise program is feasible and beneficial for improving walking ability in subjects with chronic stroke.

Sensory Retraining of the Lower Limb After Acute Stroke: A Randomized Controlled Pilot Trial

OBJECTIVE

To determine the effects of a sensory retraining protocol on sensation, postural control, and gait in acute stroke subjects.

DESIGN

Randomized controlled pilot trial.

SETTING

Inpatient rehabilitation hospital.

PARTICIPANTS

Twenty-one subjects with sensory deficits in the feet, undergoing rehabilitation for stroke.

INTERVENTION

Sensory retraining of the more affected lower limb versus relaxation (sham intervention).

MAIN OUTCOME MEASURES

Light touch at the sole of the foot (Semmes-Weinstein monofilaments), proprioception (Distal Proprioception Test), postural control (Berg Balance Scale), and gait (timed, Iowa Level of Assistance Scale).

RESULTS

Significant improvements (P<.05) over time were found in light touch at 3 points of the feet and in postural control, timed gait, and walking aid. No significant time effects were observed in proprioception or amount of assistance required to walk. No significant differences were detected between groups in any of the outcome variables, apart from light touch at the first metatarsal. The study had poor power (13%) to detect group effects due to the small sample size.

CONCLUSIONS

Results of this pilot study are unable to support or refute the routine use of sensory retraining of the lower limb for people during inpatient rehabilitation after stroke. Further research with a larger sample size is required.

Circuit Class Therapy Versus Individual Physiotherapy Sessions During Inpatient Stroke Rehabilitation: A Controlled Trial

OBJECTIVE

To compare the effectiveness of circuit class therapy and individual physiotherapy (PT) sessions in improving walking ability and functional balance for people recovering from stroke.

DESIGN

Nonrandomized, single-blind controlled trial.

SETTING

Medical rehabilitation ward of a rehabilitation hospital.

PARTICIPANTS

Sixty-eight persons receiving inpatient rehabilitation after a stroke.

INTERVENTIONS

Subjects received group circuit class therapy or individual treatment sessions as the sole method of PT service delivery for the duration of their inpatient stay.

MAIN OUTCOME MEASURES

Five-meter walk test (5MWT), two-minute walk test (2MWT), and the Berg Balance Scale (BBS) measured 4 weeks after admission. Secondary outcome measures included the Iowa Level of Assistance Scale, Motor Assessment Scale upper-limb items, and patient satisfaction. Measures were taken on admission and 4 weeks later.

RESULTS

Subjects in both groups showed significant improvements between admission and week 4 in all primary outcome measures. There were no significant between group differences in the primary outcome measures at week 4 (5MWT mean difference, .07m/s; 2MWT mean difference, 1.8m; BBS mean difference, 3.9 points). A significantly higher proportion of subjects in the circuit class therapy group were able to walk independently at discharge (P=.01) and were satisfied with the amount of therapy received (P=.007).

CONCLUSIONS

Circuit class therapy appeared as effective as individual PT sessions for this sample of subjects receiving inpatient rehabilitation poststroke. Favorable results for circuit classes in terms of increased walking independence and patient satisfaction suggest this model of service delivery warrants further investigation.

Side difference in the hip and knee joint moments during sit-to-stand and stand-to-sit tasks in individuals with hemiparesis

BACKGROUND

No study has reported the differences between sides in the net muscular moment of lower limbs of subjects with hemiparesis during sit-to-stand and stand-to-sit tasks in various foot positions. Moreover, the asymmetry of lower-joint moments has not yet been related to muscular weakness of the lower limbs in this population.

METHODS

A convenience sample of 12 individuals (mean age (standard deviation): 49.7 (9.0) years) with chronic hemiparesis due to stroke were asked to stand up and sit down at their natural speed in four foot positions. The joint moments at the hip and knee on both sides during the tasks were estimated with an inverse dynamic approach while the dynamic concentric strength in extension at the hip and knee was assessed with a Biodex dynamometric system. Statistical analyses (paired t-tests and ANOVAs) were used to assess the effects of sides and foot position factor on the asymmetry in the hip and knee joint moments. The level of association between muscle weakness and the asymmetry in the joint moments was quantified with Pearson correlation coefficients (r).

FINDINGS

At the knee, the extensor moments were significantly lower on the affected side (P<0.05) and were affected by the foot position. At the hip, the moments were not significantly different between sides and were slightly modified by the foot positions. There were also strong correlations (0.70<r<0.89; P<0.05, for symmetrical foot position) between the asymmetry in knee extensor moments and the asymmetry in strength. No relation was established at the hip.

INTERPRETATION

The sit-to-stand and stand-to-sit tasks are characterized by a marked asymmetry in the knee extensor moments, which is associated with knee extensor weakness.

Evidence-based analysis of physical therapy in Parkinson's disease with recommendations for practice and research

Physical therapy is often prescribed in Parkinson's disease. To facilitate the uniformity and efficacy of this intervention, we analyzed current evidence and developed practice recommendations. We carried out an evidence-based literature review. The results were supplemented with clinical expertise and patient values and translated into practice recommendations, developed according to international standards for guideline development. A systematic literature search yielded 6 systematic reviews and 23 randomized controlled trials of moderate methodological quality with sufficient data. Six specific core areas for physical therapy were identified: transfers, posture, reaching and grasping, balance, gait, and physical capacity. We extracted four specific treatment recommendations that were based on evidence from more than two controlled trials: cueing strategies to improve gait; cognitive movement strategies to improve transfers; exercises to improve balance; and training of joint mobility and muscle power to improve physical capacity. These practice recommendations provide a basis for current physical therapy in Parkinson's disease in everyday clinical practice, as well as for future research in this field.

Mobility on discharge from an aged care unit

BACKGROUND AND PURPOSE

Independent mobility is a crucial element of independent living and quality of life. However, little is known about the mobility of older people around the time of discharge from inpatient rehabilitation. The present study aimed to describe mobility on discharge from an aged care rehabilitation unit.

METHOD

The study utilized a descriptive, cross-sectional design. Ninety-five patients (mean age 81 (+/-8) years; 60% female) with diverse chronic conditions (median 5) who were able to walk at least 10m without weight-bearing restrictions were recruited from the aged care rehabilitation wards. Scores on the Barthel Index were obtained on admission and discharge to provide information about their overall level of function. Within the last week of rehabilitation stay, scores on the mobility and locomotion subsections of the Functional Independence Measure, gait velocity, and time and distance parameters of gait were obtained. Gait variables were measured by use of the GAITRite, an instrumented walkway. Medians and interquartile ranges (IQR) were reported for mobility variables.

RESULTS

Following inpatient rehabilitation, many patients achieved independence in bed or chair transfers (83%), toilet transfers (81%), shower transfers (60%) and level-surface walking (74%). Only 31% achieved independence in stair climbing. Patients walked slowly at a median (IQR) gait velocity of 45.96 (31.51) cm/s and with markedly diminished cadence and step length. Subjects with a low number of chronic conditions generally performed better on mobility measures than those with a high number of chronic conditions.

CONCLUSIONS

Although many older people are able to transfer and walk independently around the time of discharge from inpatient rehabilitation their mobility is still often impaired. For example, only 9.5% achieved a walking velocity considered to be adequate for street crossing and few demonstrated the ability to negotiate stairs. This highlights the need for ongoing rehabilitation for many of these older people. The possible cumulative effects of chronic conditions on mobility require further investigation.

Muscular utilization of the plantarflexors, hip flexors and extensors in persons with hemiparesis walking at self-selected and maximal speeds

Gait performance secondary to a stroke is partially dependent on residual muscle strength. However, to pinpoint more precisely the mechanism of this relationship, biomechanical models, such as the muscular utilization ratio (MUR) that integrates both muscle strength and gait parameters into the concept of level of effort, are warranted. The aim of the present study was to evaluate the MUR of plantarflexors, hip flexors and extensor muscles during their concentric action in 17 chronic hemiparetic participants walking at self-selected and maximal speeds. Results revealed that peak MUR increased with gait speed. At self-selected speed (0.73+/-0.27 m/s), peak MUR values on the paretic side were 64% (+/-18.7), 46% (+/-27.6) and 33% (+/-25.6) for the plantarflexors, hip flexors and extensor muscles, respectively. At maximal speed (1.26+/-0.39 m/s), corresponding values were 77% (+/-23.6), 72% (+/-33.0) and 58% (+/-32.1). Peak MUR showed negative associations (-0.33<r>-0.68), although not all significant, with voluntary muscle strength. The results of this study indicated that the peak MUR increased with gait speed. The plantarflexors were the most used muscle group at self-selected speed, whereas at maximal speed the three muscle groups showed similar peak MUR values. This last finding suggested an important role of the hip muscles in reaching a faster speed. Lastly, because moderate associations were found between peak MUR values and the voluntary muscle strength of hip flexors and extensors, it can be concluded that the weakest paretic muscle groups show, in general, the highest level of effort during gait.