Effect of a digital two-dimensional animation program on attitude toward walking aids, performance, and fall avoidance behaviors among older adults in assisted living facilities

The study investigated the impact of a two-dimensional animation program on attitudes towards walking aids, performance, and fall avoidance behaviors among older adults in assisted living facilities. A quasi-experimental pretest-posttest control group study was conducted on 128 older adults aged 60 years and above. The intervention group showed more favorable attitudes towards walking aids, improved cane and walker use, and reduced fall concerns. The 2D animation program proved to be an innovative teaching strategy that positively influenced attitudes, performance, and fall-related concerns among elderly residents. Integration into care settings could enhance mobility, reduce fall risks, and contribute to overall well-being.

Scale Type Revisited: Some Misconceptions, Misinterpretations, and Recommendations

Stevens’s classification of scales into nominal, ordinal, interval, and ratio types is among the most controversial yet resilient ideas in psychological and educational measurement. In this essay, I challenge the notion that scale type is essential for the development of measures in these fields. I highlight how the concept of scale type, and of interval-level measurement in particular, is variously interpreted by many researchers. These (often unstated) differences in perspectives lead to confusion about what evidence is appropriate to demonstrate interval-level measurement, as well as the implications of scale type for research in practice. I then borrow from contemporary ideas in the philosophy of measurement to demonstrate that scale type can only be established in the context of well-developed theory and through experimentation. I conclude that current notions of scale type are of limited use, and that scale type ought to occupy a lesser role in psychometric discourse and pedagogy.

The Validation Study of Both the Modified Barthel and Barthel Index, and Their Comparison Based on Rasch Analysis in the Hospitalized Acute Stroke Elderly

A validation study the Iranian Modified Barthel Index (MBI) in hospitalized acute stroke elderly by classical test theory approach and investigate Rasch analysis for both Iranian version MBI and BI and compare the hierarchical item difficulty of them. Face-to-face interview with 100 geriatric stroke inpatients 60+ or their caregivers was done in a cross-sectional study. First, construct validity of MBI analyzed by the classical test theory, then Rasch analysis were done for BI and MBI. The reliability of the Iranian MBI was significant at 0.955. One factor achieved by the variance of 83.2%. In Rasch analysis for MBI, the most difficult item was stair climbing, whereas the simplest items were bowel and bladder control. In BI, the most difficult items were toilet use and ambulation. The Iranian MBI is very accurate and reliable; therefore the use of MBI to measure better outcomes in stroke elderly inpatients is recommended comparing with BI.

Statistical Considerations for Drawing Conclusions About Recovery

BACKGROUND

Numerous studies have found associations when change scores are regressed onto initial impairments in people with stroke (slopes ≈ 0.7). However, there are important statistical considerations that limit the conclusions we can draw about recovery from these studies.

OBJECTIVE

To provide an accessible checklist of conceptual and analytical issues on longitudinal measures of stroke recovery. Proportional recovery is an illustrative example, but these considerations apply broadly to studies of change over time.

METHODS

Using a pooled data set of n = 373 Fugl-Meyer Assessment upper extremity scores, we ran simulations to illustrate 3 considerations: (1) how change scores can be problematic in this context; (2) how "nil" and nonzero null-hypothesis significance tests can be used; and (3) how scale boundaries can create the illusion of proportionality, whereas other analytical procedures (eg, post hoc classifications) can augment this problem.

RESULTS

Our simulations highlight several limitations of common methods for analyzing recovery. We find that uniform recovery leads to similar group-level statistics (regression slopes) and individual-level classifications (into fitters and nonfitters) that have been claimed as evidence for the proportional recovery rule. New analyses, however, also speak to the complexities in variance about the regression slope.

CONCLUSIONS

Our results highlight that one cannot identify whether proportional recovery is true or not based on commonly used methods. We illustrate how these techniques, measurement tools, and post hoc classifications (eg, nonfitters) can create spurious results. Going forward, the field needs to carefully consider the influence of these factors on how we measure, analyze, and conceptualize recovery.

Is Barthel Index Suitable for Assessing Activities of Daily Living in Patients With Dementia?

OBJECTIVES

To evaluate application of the Barthel Index (BI) in assessing basic activities of daily living (ADL) of patients with dementia using Rasch analysis.

DESIGN

A multi-country cross-sectional study.

SETTING AND PARTICIPANTS

Nineteen long-term care facilities located in China, Japan, South Korea, and Thailand. A total of 644 patients with dementia were included.

METHODS

Unidimensionality, global and item fit, local dependence, person-item targeting, threshold disordering, and differential item functioning (DIF) were examined. Negative correlations between scores for DIF items and Neuropsychiatric Inventory Nursing Home version (NPI-NH) were evaluated.

RESULTS

Item reliability (1.0) and person reliability (.88) were acceptable. The Rasch dimension explained 72.9% of the variance (Eigenvalue = 27), while the first contrast explained 6.6% (Eigenvalue = 2.4). The "mobility" was misfitting to the Rasch model (infit mean square = 1.86). The overall difficulty of the BI exceeded patients' ability (person location = -2.27 logits). The "stairs climbing" and "mobility" showed narrow category thresholds (< 1.4 logits). The location of "controlling bladder" and "toilet use" overlapped. Removing "stairs climbing", collapsing categories with narrow threshold widths in "mobility", and combining "controlling bowel" and "controlling bladder" into one item, improved unidimensionality, and item fit of the scale. Only three items ("grooming", "dressing", and "toilet use") were free from DIF across countries. The scores for "feeding" were negatively related to scores for "disinhibition" (r = -0.46, P < 0.01), and scores for "controlling bowel" were negatively related to scores for "disinhibition" (r = -0.44, P < 0.01), "agitation" (r = -0.32, P < 0.05), and "aggression" (r = -0.27, P < 0.01) in Japanese samples.

CONCLUSIONS AND IMPLICATIONS

The performance of the BI for assessing patients with dementia might be compromised by misfit items, person-item mistargeting, measurement gaps, redundant items, narrow threshold width, and item bias. Mobility ability might not be helpful for determining capability of basic ADL in the patients. Comparisons of BI scores between countries should be undertaken with caution due to item bias. Neuropsychiatric symptoms might interact with basic ADL abilities of the patients. We will not suggest using the instrument in patients with dementia, without future refining to improve its performance.

Outcomes of reablement and their measurement: Findings from an evaluation of English reablement services

Reablement - or restorative care - is a central feature of many western governments' approaches to supporting and enabling older people to stay in their own homes and minimise demand for social care. Existing evidence supports this approach although further research is required to strengthen the certainty of conclusions being drawn. In countries where reablement has been rolled out nationally, an additional research priority - to develop an evidence base on models of delivery - is emerging. This paper reports a prospective cohort study of individuals referred to three English social care reablement services, each representing a different model of service delivery. Outcomes included healthcare- and social care-related quality of life, functioning, mental health and resource use (service costs, informal carer time, out-of-pocket costs). In contrast with the majority of other studies, self-report measures were the predominant source of outcomes and resource use data. Furthermore, no previous evaluation has used a global measure of mental health. Outcomes data were collected on entry to the service, discharge and 6 months post discharge. A number of challenges were encountered during the study and insufficient individuals were recruited in two research sites to allow a comparison of service models. Findings from descriptive analyses of outcomes align with previous studies and positive changes were observed across all outcome domains. Improvements observed at discharge were, for most, retained at 6 months follow-up. Patterns of change in functional ability point to the importance of assessing functioning in terms of basic and extended activities of daily living. Findings from the economic evaluation highlight the importance of collecting data on informal carer time and also demonstrate the viability of collecting resource use data direct from service users. The study demonstrates challenges, and value, of including self-report outcome and resource use measures in evaluations of reablement.

Validation of the Persian Translation of the Children's Test Anxiety Scale: A Multidimensional Rasch Model Analysis

In this study, we examine the psychometric properties of the Persian translation of the Children's Test Anxiety Scale (CTAS) using the Rasch rating scale model. In the first step, rating scale diagnostics revealed that the thresholds were disordered. To remedy this problem, two categories were collapsed and a rating scale structure with three points turned out to have optimal properties. Principal component analysis (PCA) of standardized residuals showed that the scale is not unidimensional. Since the scale is designed to measure three distinct dimensions of test anxiety we fitted a correlated three-dimensional Rasch model. A likelihood ratio test showed that the three-dimensional model fits significantly better than a unidimensional model. Principal component analysis of standardized residuals indicated that three subscales are unidimensional. Infit and outfit statistics indicated that one item misfitted the model in all the analyses. Medium correlations between the dimensions was evidence of the distinctness of the subscales and justifiability of the multidimensional structure for the scale. Criterion-related evidence was provided by correlating the scale with the Spence Children's Anxiety Scale (SCAS). The patterns of correlations provided evidence of convergent-discriminant validity. Findings suggest that a three-dimensional instrument with a 3-point Likert scale works best in the Persian language.

The Usefulness of Basic Movement Scale in Hip Fracture Patients: Construct Validity from a Cross-Sectional Study

OBJECTIVE

The aim of the study was to investigate the validity of using total score and to examine the constitution and characteristics of the Basic Movement Scale in postsurgery patients with hip fracture.

DESIGN

The dimensionality and the threshold difficulty intervals between each score and item difficulty hierarchy of the Basic Movement Scale were examined using factor analysis and Rasch analysis in 37 patients admitted to our hospital between April and November 2015.

RESULTS

For factor analysis, the contribution ratio of the first factor was 78.9%, that of the second factor was 6.5%, and there were no items that fit the Rasch analysis. The threshold was reversed at 6 of the 48 locations. The difficulty of the 12 Basic Movement Scale items was distributed roughly evenly among all 9 lots, with some deviation. There was one very easy item, and there were some items almost overlapping in difficulty.

CONCLUSIONS

The results showed a unidimensional association between the items and evaluation index. The difficulty threshold of each score was approximated to the interval scale. Therefore, the Basic Movement Scale has evident construct validity and enables quantitative evaluation of physical ability, assessment of the effects of daily training, and general predictions of the feasibility of patients' clinical goals.

Validation of international stroke scales for use by nurses in Greek settings

BACKGROUND

Improving stroke outcomes by educating nurses in state-of-the-art stroke nursing skills is essential, but unfortunately, to date, there are limited validated stroke assessment scales for routine clinical and research use in Greece.

OBJECTIVE

The aim of this paper is to validate and culturally adapt three internationally recognised stroke scales for use in Greece.

METHODS

A critical appraisal of the international literature was undertaken to identify suitable scales to assess stroke impact: neurological, functional status and level of dependence. We identified: Scandinavian Stroke Scale (SSS), Barthel Index (BI) and modified Rankin Scale (mRS). They were formally translated and culturally adapted from English to Greek. Their validity was tested using Cronbach's alpha and Median Discrimination Index, while construct validity was checked by Principal Component Analysis (PCA). These were used on 57 consecutively selected patients with stroke from a Greek hospital, mean age 67.7 (±6.7 SD) years, range 54-85 years, length of stay, 8.5 (±2.7 SD) days.

RESULTS

All three scales show high internal consistency. The Cronbach's α on admission/ discharge for the SSS ranged from 0.86 to 0.88. The BI's reliability ranged from 0.95 to 0.93. The Median Discrimination Index was 0.70 (SSS) and 0.83 (BI). PCA showed that although a significant general factor (F1) explains most of the variance (57.0% on admission and 56.4% on discharge) a second factor (F2) of less significance was also highlighted. The convergent validity of the three scales was confirmed.

DISCUSSION

The stroke tools selected showed high reliability and validity, thus making these suitable for use in Greek clinical/academic environments. All three scales used are almost routinely undertaken in stroke studies internationally and form a backdrop for bio-statistical, functional and social outcome post-stroke.

CONCLUSIONS

The Greek version of the stroke tools show that both SSS and BI have high internal consistency and reliability and together with the mRS could be used in any Greek stroke care delivery setting.

Improving the utility of the Brunnstrom recovery stages in patients with stroke: Validation and quantification

The Brunnstrom recovery stages (the BRS) consists of 2 items assessing the poststroke motor function of the upper extremities and 1 assessing the lower extremities. The 3 items together represent overall motor function. Although the BRS efficiently assesses poststroke motor functions, a lack of rigorous examination of the psychometric properties restricts its utility. We aimed to examine the unidimensionality, Rasch reliability, and responsiveness of the BRS, and transform the raw sum scores of the BRS into Rasch logit scores once the 3 items fitted the assumptions of the Rasch model.We retrieved medical records of the BRS (N = 1180) from a medical center. We used Rasch analysis to examine the unidimensionality and Rasch reliability of both upper-extremity items and the 3 overall motor items of the BRS. In addition, to compare their responsiveness for patients (n = 41) assessed with the BRS and the Stroke Rehabilitation Assessment of Movement (STREAM) on admission and at discharge, we calculated the effect size (ES) and standardized response mean (SRM).The upper-extremity items and overall motor items fitted the assumptions of the Rasch model (infit/outfit mean square = 0.57-1.40). The Rasch reliabilities of the upper-extremity items and overall motor items were high (0.91-0.92). The upper-extremity items and overall motor items had adequate responsiveness (ES = 0.35-0.41, SRM = 0.85-0.99), which was comparable to that of the STREAM (ES = 0.43-0.44, SRM = 1.00-1.13).The results of our study support the unidimensionality, Rasch reliability, and responsiveness of the BRS. Moreover, the BRS can be transformed into an interval-level measure, which would be useful to quantify the extent of poststroke motor function, the changes of motor function, and the differences of motor functions in patients with stroke.

Development of a Chinese version of the Modified Barthel Index — validity and reliability

Objective: To establish the structural validity of the Chinese version of the Modified Barthel Index and to estimate its inter-rater reliability for use with patients who have had a stroke.

Design: Prospective study.

Setting: A regional general hospital and a day hospital in Hong Kong.

Subjects: One hundred and sixteen older people who had had a stroke (mean age 76.0; SD 7.6) were involved in the establishment of evidence of the structural validity and item quality. Another 15 older people with stroke (mean age 78.0; SD 7.1) participated in estimating the reliability of the instrument.

Methods and results: The Modified Barthel Index was translated into Chinese. Factor analyses revealed a two-factor structure that explained 75.7% of the total variance. Factor 1 was found to consist of eight items relating to patients' functional performance. Factor 2 consisted of the two items that focused on patients' `physiological needs'. The test—retest reliability of the Chinese version at the item level was comparable with that of the original version, with kappa statistics ranging from 0.63 to 1.00 (P < 0.001).

Conclusion: The Chinese version of the Modified Barthel Index (MBI-C) seems to be valid and reliable for use with older people with stroke. Changes were made to the item content and the rating criteria that were specific to Chinese culture. The structural validity and the reliability of the Chinese version were shown to be robust across the original and Chinese groups.

A study to describe the health trajectory of patients with advanced renal disease who choose not to receive dialysis

BACKGROUND

Some patients with end-stage renal failure (ESRF) are unlikely to benefit from dialysis and conservative management (CM) is offered as a positive alternative. Understanding the trajectory of illness by health care professionals may improve end-of-life care.

METHODS

We aimed to describe the trajectory of functional status within our CM population through a prospective, observational study using the objective Timed Up and Go (TUG) test and subjective Barthel Index (BI) and health-related quality of life (HRQoL) [EuroQol 5D-5L (EQ-5D-5L)] measurements and correlating them with demographic and laboratory data and with sentinel events.

RESULTS

There was a significant increase in TUG scores over the 6 months prior to death {2.24 [95% confidence interval (CI) 1.16-4.32], P = 0.017} and a significant decrease in EQ-5D-5L [-0.19 (95% CI -0.33 to -0.06), P = 0.006]. The only significant associations with mortality were serum albumin [hazard ratio (HR) 0.81 (95% CI 0.67-0.97), P = 0.024] and male gender [HR 5.94 (95% CI 1.50-23.5), P = 0.011].

CONCLUSIONS

We have shown there is a significant decline in functional status in the last 6 months before death in the CM population. Of interest, there was a significant relationship of lower serum albumin with functional decline and risk of death. We hope that with improved insight into disease trajectories we can improve our ability to identify and respond to the changes in needs of these patients, facilitate complex and sensitive end-of-life discussions and improve end-of-life care.

[Issues involved with supply of medical and hygienic materials to home care patients]

Questionnaires were mailed to doctors and nurses who are involved in home care to survey their observations on medical and hygienic materials and its supply to home care patients. Some of the survey items, such as problems encountered frequently, areas where an improvement was needed most and concerns that are often raised in suppling of medical and hygienic materials for home care patients, were analyzed by the Berelson's content analysis method to observe problems in suppling adequate medical and hygienic materials. As a result, 5 categories and 17 subcategories were formed. The recognized future issues were: policies concerning support extended to medical organizations and disseminate information of the system, which medical and hygienic materials supplied to home care patients.

Improved Interpretation of Stroke Trial Results Using Empirical Barthel Item Weights

Background and Purpose— Attempts have been made to provide guidelines for interpreting Barthel scores. We used a Rasch analysis to improve the measurement properties and clinical interpretability of the Barthel index score.

Methods— A specific extension of Rasch model was used to identify items that preclude the summation of items and to improve the item rating scale by examining the scores on the Barthel of 559 stroke patients scored 3 weeks (n=89) and 6 months (n=470) after stroke. The clinical interpretation of the revised Rasch modeled Barthel was illustrated by re-examining the results of a previously published trial on the effectiveness of leg and arm training after stroke.

Results— Most rating scales could be improved by collapsing nondiscriminating rating categories. Two items showed misfit: Bladder and Bowel. The remaining Barthel showed an excellent fit to the extended Rasch model (R1c Goodness-of-Fit P =0.35). Both items and patients could be placed on a common logit unit scale, allowing a clearer interpretation of the trial effect. Using the modeled activities of daily living difficulty/ability scale, we could express the differences between treatment arms in modeled probabilities of a positive score to each Barthel item for the treatment arms not conveyed by the original ordinal Barthel sum scores.

Conclusion— We improved the psychometric properties and clinical interpretation of the Barthel index.

Late multidisciplinary rehabilitation in young people after stroke

PURPOSE

Stroke has a major impact on physical and cognitive ability, and quality of life. This study aims to examine the effect of multidisciplinary rehabilitation on outcome in an Irish young stroke population.

METHODS

Fifty consecutive patients younger than 65 were prospectively recruited to this observational study. Physical and cognitive ability, and quality of life were measured on admission and discharge.

RESULTS

All patients were transferred to the rehabilitation unit from the acute hospital where they had received their initial management. Median length of time from stroke onset to transfer was 112 days. After a median of 70 days, 43 patients were discharged home. Patients made significant gains in physical (Barthel index 12 to 18) and cognitive ability (mini-mental state examination 22 to 25). Quality of life improved in all eight domains of the 36-items Short Form with four domains returning to level seen in the general population.

CONCLUSIONS

This study documents the improvements in physical and cognitive abilities, and quality of life in a sample of patients in rehabilitation. A comprehensive rehabilitation programme that includes acute and late multidisciplinary phases can improve the outcome of patients following stroke.

Item-response-Theorie und deren Anwendung in der Neurologie

This article is concerned with the measurement of activity limitations in neurologic patients and with the application of the item response theory (IRT), especially the Rasch analysis, in analyzing activity ratings. Activity limitations of 166 patients with different neurologic disorders (e.g., stroke, traumatic brain injury) were assessed with the Functional Independence Measure (FIM) during their stay in a rehabilitation hospital. Data analysis was performed with the Rasch model, which allows testing the psychometric qualities of the FIM. Results indicate that the FIM has good psychometric qualities. However, results also show that the 18 FIM items define two statistically and clinically different indicators. Thirteen items define disability in motor functions. Five items define disability in cognitive functions. Separate analyses of the two scales help to improve the psychometric quality of the FIM.

[The Barthel Index in geriatrics. A context analysis for the Hamburg Classification Manual]

The Barthel Index (BI) is firmly established as an assessment instrument in geriatrics. It is a proven, clear and easy-to-use instrument for the recording of basic daily functions. However it is increasingly finding new applications beyond its original, clinically orientated use. It has been applied as a quality parameter, as an instrument for the management of service delivery provision and as an instrument to record treatment efforts relevant to care or costs. This study considers the basic suitability prerequisites of the Barthel Index for these applications.With the Hamburg Classification Manual for the BI, German geriatrics has made a contribution to the standardized operationalization of the items and to the standardized evaluation of aids. An evaluation was performed on a total of 5262 Barthel classifications at seven geriatric hospitals according to existing classification practice by comparison with 5483 classifications after introduction of the Hamburg Classification Manual. No significant differences were found in Barthel Index total scores either on admission or on discharge. With respect to further applications it is essential to be aware that the usability of the total score (including its changes over the course of time) is limited because of the ordinal scaling of the BI. Studies have been carried out which show how important this is, although they have so far received little attention. As a grading criterion the BI takes account not only of the "functional status" but also of the "extent of support effort". This can lead to positive changes in one focus -- especially with the use of aids -- without associated improvements in the other focus. Whether the BI in this form is meaningful for a specific application must be tested separately for each individual context. There is no justification for assuming that the BI has general validity irrespective of application. The results of a systematic literature survey on the testing quality criteria of the BI indicate an astonishingly generous approach to the question of the validity of the BI. Contrary to widespread opinion, cognitive-psychological components do influence the classification result of the BI. As an addition to the Hamburg Classification Manual we recommend that the extent of this influencing factor should also be more clearly operationalized and that "stimulation required" for the carrying out of an activity be included in the evaluation equivalent to the factor "supervision required" already introduced by Barthel and Mahoney. The BI has shown itself to be an efficient but nonetheless multidimensional global parameter in clinical practice, whose meaningfulness is on the level of the individual item and whose validity, particularly as total score and course parameter, needs to be proven for each new application. The Hamburg Classification Manual, as a standardized and consensus-based operationalization of the BI, provides an important basis for this.

Issues in cross-cultural validity: example from the adaptation, reliability, and validity testing of a Turkish version of the Stanford Health Assessment Questionnaire

OBJECTIVE

Guidelines have been established for cross-cultural adaptation of outcome measures. However, invariance across cultures must also be demonstrated through analysis of Differential Item Functioning (DIF). This is tested in the context of a Turkish adaptation of the Health Assessment Questionnaire (HAQ).

METHODS

Internal construct validity of the adapted HAQ is assessed by Rasch analysis; reliability, by internal consistency and the intraclass correlation coefficient; external construct validity, by association with impairments and American College of Rheumatology functional stages. Cross-cultural validity is tested through DIF by comparison with data from the UK version of the HAQ.

RESULTS

The adapted version of the HAQ demonstrated good internal construct validity through fit of the data to the Rasch model (mean item fit 0.205; SD 0.998). Reliability was excellent (alpha = 0.97) and external construct validity was confirmed by expected associations. DIF for culture was found in only 1 item.

CONCLUSIONS

Cross-cultural validity was found to be sufficient for use in international studies between the UK and Turkey. Future adaptation of instruments should include analysis of DIF at the field testing stage in the adaptation process.

Rasch Analysis of Combining Two Indices to Assess Comprehensive ADL Function in Stroke Patients

Background and Purpose— To justify the summation of scores representing comprehensive activities of daily living (ADL) function, a Rasch analysis was performed to examine whether items of the Barthel Index (BI), assessing ADL, and items of the Frenchay Activities Index (FAI), assessing instrumental ADL, contribute jointly to a single, unidimensional construct in stroke patients living in the community. The number of scoring points of both indices was examined for their usefulness in discerning the various ability levels of ADL in these patients.

Methods— A total of 245 patients at 1 year after stroke participated in this study. The BI and FAI were administered to the patient and/or the patient’s main caregiver by interview.

Results— The initial Rasch analysis indicated that the middle scoring points for many items of the BI and FAI could be collapsed to allow only dichotomous response categories. All but 2 items of the FAI, social occasions and walking outside, fitted the model’s expectations rather well. These 2 items were excluded from further analysis. A factor analysis performed on the residuals of the Rasch-transformed scores recovered no dominant component. These results indicate that the combined 23 dichotomous items of the BI and FAI assess a single unidimensional ADL function.

Conclusions— A clinically useful assessment of the comprehensive ADL function of patients at or later than 1 year after stroke can be obtained by combining the items of the BI and FAI (excluding 2 FAI items) and simplifying the responses into dichotomous categories. It is also demonstrated that the items of the new scale measure comprehensive ADL function as a single unidimensional construct when assessed at 1 year after stroke.

Assessing and adjusting for cross-cultural validity of impairment and activity limitation scales through differential item functioning within the framework of the Rasch model: the PRO-ESOR project

INTRODUCTION

In Europe it is common for outcome measures to be translated for use in other languages. This adaptation may be complicated by culturally specific approaches to certain tasks; for example, bathing. In this context the issue of cross-cultural validity becomes paramount.

OBJECTIVE

To facilitate the pooling of data in international studies, a project set out to evaluate the cross-cultural validity of impairment and activity limitation measures used in rehabilitation from the perspective of the Rasch measurement model.

METHODS

Cross-cultural validity is assessed through an analysis of Differential Item Functioning (DIF) within the context of additive conjoint measurement expressed through the Rasch model. Data from patients undergoing rehabilitation for stroke was provided from 62 centers across Europe. Two commonly used outcome measures, the Mini-Mental State Examination (MMSE) and the Functional Independence Measure (FIM) motor scale are used to illustrate the approach.

RESULTS

Pooled data from 3 countries for the MMSE were shown to fit the Rasch model with only 1 item displaying DIF by country. In contrast, many items from the FIM expressed DIF and misfit to the model. Consequently they were allowed to be unique across countries, so resolving the lack of fit to the model.

CONCLUSIONS

Where data are to be pooled for international studies, analysis of DIF by culture is essential. Where DIF is observed, adjustments can be made to allow for cultural differences in outcome measurement.

Effects of a perindopril-based blood pressure-lowering regimen on disability and dependency in 6105 patients with cerebrovascular disease: a randomized controlled trial

BACKGROUND AND PURPOSE

We sought to quantify the effects of blood pressure lowering on long-term disability and dependency among patients with cerebrovascular disease.

METHODS

We performed a randomized, double-blind, placebo-controlled trial. A total of 6105 participants with a history of stroke or transient ischemic attack in the past 5 years were recruited from 172 hospital outpatient clinics in 10 countries. Subjects were randomly assigned to the following groups: active treatment (angiotensin-converting enzyme inhibitor perindopril [4 mg/d] for all patients, with the diuretic indapamide added at the discretion of treating physicians) or matching placebo(s). Measurements were disability (defined as a Barthel Index score < or =99/100) and dependency (a positive response to the following question: "In the last 2 weeks has the patient required regular help with everyday activities?").

RESULTS

The median duration of follow-up was 4 years. At the last available assessment, 19% of the active treatment group and 22% of the placebo group were disabled (adjusted odds ratio, 0.76; 95% CI, 0.65 to 0.89; P<0.001). Twelve percent of the active treatment group and 14% of the placebo group were dependent (adjusted odds ratio, 0.84; 95% CI, 0.71 to 0.99; P=0.04). The effects of treatment appeared to be mediated primarily through the prevention of disability and dependency associated with recurrent stroke. Four-year treatment with the study drug regimen would be expected to result in the avoidance of 1 case of long-term disability for every 30 (95% CI, 19 to 79) patients.

CONCLUSIONS

Among individuals with cerebrovascular disease, a perindopril-based blood pressure-lowering regimen not only reduced the risk of stroke and major vascular events but also substantially reduced the risks of associated long-term disability and dependency.

Inter-rater and test-retest reliability of the Taiwanese Rehabilitation Functional Scale

The need of a standardized evaluation tool for clinical practice is acknowledged by occupational therapists worldwide. The purpose of this study was to examine the inter-rater and test-retest reliabilities of the Taiwanese Rehabilitation Functional Scale (TaRFS) developed in Taiwan. Seventy-five subjects with varying diagnoses were recruited to participate in the study. They came from an inpatient re-habilitation unit within a university-affiliated hospital. All participants were tested on a functional measure of their independence on activities of daily living and cognitive-social tasks, and of their sense of well-being. The Activity of Daily Living (ADL) and CognitiveSocial Skills (CSS) subscales of the TaRFS were found to be reliable across raters and times. But individual items on the Subjective Well Being subscale were not stable across time. The results indicated that the ADL subscale as well as most items in the CSS subscale of the TaRFS can be utilized reliably in clinical practice. The SWB subscale of the TaRFS may need further revision in order to be used stably across time. The development of the TaRFS and future revision of the scale can be beneficial for occupational therapists in Taiwan to provide evidence of their intervention efficacy.

Sensitivity of Shah, Vanclay and Cooper's modified Barthel Index

OBJECTIVE

To investigate whether Shah, Vanclay and Cooper's modification of the Barthel Index improved its sensitivity to change.

DESIGN

Correlational study.

SETTING

School of Occupational Therapy at Auckland Institute of Technology, Auckland, New Zealand.

SUBJECTS

One hundred subjects requiring rehabilitation following a stroke.

MAIN OUTCOME MEASURES

Change in function which was measured using Shah, Vanclay and Cooper's (1989) modified Barthel Index and walking speed over 10 metres.

RESULTS

Five statistical analyses were undertaken, none of which demonstrated clear superiority of one measure over the other.

CONCLUSIONS

The study did not indicate the modified Barthel Index to be more sensitive to change than the 20-point Barthel Index for this population. The statistical analysis strategies utilized are recommended for similar studies.

Traumatic brain injury: efficacy of multidisciplinary rehabilitation

OBJECTIVE

To establish efficacy of a coordinated multidisciplinary rehabilitation service for severe head injury, provided at Hunters Moor Regional Rehabilitation Centre.

DESIGN

A quasi-experimental design to compare treatment effects between two groups. The first group received a coordinated, multidisciplinary regional rehabilitation service; the other, a single discipline approach provided by local, district hospitals. Follow-up was for 2 years postinjury.

PATIENTS OR OTHER PARTICIPANTS

Fifty-six consecutive severe head injury admissions, with an identified main caregiver, referred for rehabilitation within 4 weeks of their injury.

MAIN OUTCOME MEASURES

The Barthel index, the Functional Independence Measure (FIM), and the Newcastle Independence Assessment Form (NIAF), a newly developed, real-life, comprehensive measure. In addition, caregivers completed the General Health Questionnaire.

RESULTS

The group that received coordinated multidisciplinary rehabilitation not only demonstrated significant gains throughout the study period but also maintained treatment effect after input ended. Furthermore, caregivers of this group had significantly reduced levels of distress. The comparison group, despite initial lower injury severity and shorter hospital stay, did not demonstrate equivalent gains or any posttreatment effect.

CONCLUSIONS

The results show the efficacy of a comprehensive, specialist multidisciplinary regional service. There are significant implications for service provision for people with severe traumatic head injury.