Chinese cross-cultural adaptation and validation of the Foot Function Index as tool to measure patients with foot and ankle functional limitations

Purpose: To perform a cross-cultural adaptation and validation of the Foot Function Index (FFI) questionnaire to develop the Chinese version.

Materials and methods: Three hundred and six patients with foot and ankle neuromusculoskeletal diseases participated in this observational study. Construct validity, internal consistency and criterion validity were calculated for the FFI Chinese version after the translation and transcultural adaptation process.

Results: Internal consistency ranged from 0.996 to 0.998. Test–retest analysis ranged from 0.985 to 0.994; minimal detectable change 90: 2.270; standard error of measurement: 0.973. Load distribution of the three factors had an eigenvalue greater than 1. Chi-square value was 9738.14 (p?r?=??0.634 (Factor 2) and r?=??0.191 (Factor 1). Foot Function Index (Taiwan Version), Short-Form 12 (Version 2) and EuroQol-5D were used for criterion validity. Factors 1 and 2 showed significant correlation with 15/16 and 14/16 scales and subscales, respectively.

Conclusions: Foot Function Index Chinese version psychometric characteristics were good to excellent. Chinese researchers and clinicians may use this tool for foot and ankle assessment and monitoring.

• Implications for rehabilitation

• A cross-cultural adaptation of the FFI has been done from original version to Chinese.

• Consistent results and satisfactory psychometric properties of the Foot Function Index Chinese version have been reported.

• For Chinese speaking researcher and clinician FFI-Ch could be used as a tool to assess patients with foot disease.

     

The Fugl–Meyer assessment of the upper extremity: reliability,responsiveness and validity of the Danish version

Objective: To translate the Fugl-Meyer Assessment of the Upper Extremity (FMA-UE) into Danish and to establish the inter-tester reliability, responsiveness, Minimal Clinically Important Difference (MCID) and concurrent validity of the FMA-UE in a population of stroke patients. Method: The translation was conducted in accordance with the principles outlined by the ISPOR Task Force for Translation and Cultural Adaption. Inter-rater reliability was assessed at baseline. Each patient was tested by two examiners and inter class correlation (ICC) was calculated. Responsiveness was assessed using receiver operating characteristic (ROC) curve statistics. The FMA-UE change score was used to assess sensitivity and specificity and to correctly determine which patients had improved. The MCID and the area under the curve (AUC) were established using the ROC. The FMA-UE’s concurrent validity with the Motor Assessment Scale was determined using Spearman’s rank correlation. Setting: The study took place at Skive Neurorehabilition, Denmark from May 2014 to February 2015. Participants: Inpatients, who were in the acute to sub-acute stage of stroke and aged?>?18 years. Interventions: Not applicable. Main outcome measure: The FMA-UE. Results: In 50 inpatients the ICC was 0.95, AUC was 0.87, with a sensitivity of 77%, a specificity of 89% and an MCID?≥?4. Concurrent validity was high, with r?=?0.94–0.95. Conclusion: The FMA-UE was successfully translated into Danish. An MCID?≥?4 was found. This study provides evidence that the FMA-UE is a reliable, responsive and valid instrument for measuring upper limb impairment after stroke.

• Implications for rehabilitation

• One of the most widely recognized measures of upper extremity motor impairment post-stroke is the Fugl-Meyer Assessment of the Upper Extremity (FMA-UE).

• The psychometric properties of a measurement depends on the population and setting in which it is used.

• In this study, the FMA-UE is translated into Danish and the psychometric properties of FMA-UE is determined in a Danish population of patients with stroke.

• The FMA-UE is now available to use for clinicians in Denmark.

     

Motor skill changes and neurophysiologic adaptation to recovery-oriented virtual rehabilitation of hand function in a person with subacute stroke: a case study

Purpose: The complexity of upper extremity (UE) behavior requires recovery of near normal neuromuscular function to minimize residual disability following a stroke. This requirement places a premium on spontaneous recovery and neuroplastic adaptation to rehabilitation by the lesioned hemisphere. Motor skill learning is frequently cited as a requirement for neuroplasticity. Studies examining the links between training, motor learning, neuroplasticity, and improvements in hand motor function are indicated.

Methods: This case study describes a patient with slow recovering hand and finger movement (Total Upper Extremity Fugl–Meyer examination score?=?25/66, Wrist and Hand items?=?2/24 on poststroke day 37) following a stroke. The patient received an intensive eight-session intervention utilizing simulated activities that focused on the recovery of finger extension, finger individuation, and pinch-grasp force modulation.

Results: Over the eight sessions, the patient demonstrated improvements on untrained transfer tasks, which suggest that motor learning had occurred, as well a dramatic increase in hand function and corresponding expansion of the cortical motor map area representing several key muscles of the paretic hand. Recovery of hand function and motor map expansion continued after discharge through the three-month retention testing.

Conclusion: This case study describes a neuroplasticity based intervention for UE hemiparesis and a model for examining the relationship between training, motor skill acquisition, neuroplasticity, and motor function changes.

• Implications for rehabilitation

• Intensive hand and finger rehabilitation activities can be added to an in-patient rehabilitation program for persons with subacute stroke.

• Targeted training of the thumb may have an impact on activity level function in persons with upper extremity hemiparesis.

• Untrained transfer tasks can be utilized to confirm that training tasks have elicited motor learning.

• Changes in cortical motor maps can be used to document changes in brain function which can be used to evaluate changes in motor behavior persons with subacute stroke.

     

Psychometric properties of the performing arts module of the Disabilities of the Arm,Shoulder, and Hand questionnaire

Abstract

Background: The Disabilities of the Arm, Shoulder, and Hand questionnaire (DASH) offers an optional performing arts module. The goal was to examine the psychometric properties of this module in musicians.

Methods: This study is a secondary analysis of a randomized controlled trial on the effectiveness of a biopsychosocial intervention to prevent or reduce playing-related disability in conservatory students. Baseline data were used to examine internal consistency and discriminative validity of the performing arts module of the DASH questionnaire. Construct validity was analyzed by hypotheses testing. The performing arts module outcomes were compared to scores from the general DASH questionnaire, pain disability index, Short-Form 36, playing-related musculoskeletal disorder (PRMD) intensity, and pain intensity.

Results: Questionnaires completed by 130 conservatory students were analyzed, 55% of the population was female. Median age was 20 years (IQR 4). The performing arts module showed good internal consistency (Cronbach’s alpha 0.893). Discriminative validity between students with and without PRMDs was good. Three out of six hypotheses were accepted, indicating moderate construct validity.

Conclusions: The performing arts module showed good internal consistency, good discriminative validity and moderate construct validity in a population of conservatory students.

• Implications for Rehabilitation

• Musicians suffer frequently from musculoskeletal disorders, mostly in the upper extremity.

• The Disabilities of the Arm, Shoulder, and Hand questionnaire is a well-known outcome measure, which also includes a performing arts module.

• This study is the first to explore psychometric properties of the performing arts module.

• The performing arts module of the Disabilities of the Arm, Shoulder, and Hand questionnaire showed good internal consistency, good discriminative validity, and moderate construct validity.

     

Reliability and validity of the Finnish version of the Lower Extremity Functional Scale (LEFS)

Purpose: The present study aimed to assess the psychometric properties of the Finnish version of the Lower Extremity Functional Scale (LEFS) among foot and ankle patients.

Methods: The LEFS was translated and cross-culturally adapted to Finnish. We assessed the test–retest reliability, internal consistency, floor-ceiling effect, construct validity and criterion validity in patients who underwent surgery due to musculoskeletal pathology of the foot and ankle (N?=?166).

Results: The test–retest reliability was high (ICC = 0.93, 95% CI: 0.91–0.95). The standard error of measurement was 4.1 points. The Finnish LEFS showed high internal consistency (Cronbach’s α?=?0.96). A slight ceiling effect occurred as 17% achieved the maximum score. The LEFS correlation was strong with the 15D Mobility dimension (r?=?0.74) and overall HRQoL (r?=?0.66), pain during foot and ankle activity (r=??0.69) and stiffness (r=??0.62). LEFS correlated moderately with foot and ankle pain at rest (r=??0.50) and with physical activity (r?=?0.46).

Conclusions: The Finnish version of the LEFS showed reliability and validity comparable to those of the original version. This study indicates that the Finnish version of the LEFS serves both clinical and scientific purposes in assessing lower-limb function.

• Implications for Rehabilitation

• The Finnish version of the Lower Extremity Functional Scale (LEFS) is a reliable and valid tool for assessing lower-extremity musculoskeletal disability in Finnish-speaking population.

• Investigation of the psychometric properties of the Finnish version of the LEFS showed validity and reliability comparable to those of the original English version.

• The Finnish LEFS is easy to complete and suitable for clinical, rehabilitation and research purposes.

     

Cross-cultural adaptation,validity and reliability of the Arabic version of the Lower Extremity Functional Scale

Purpose: The aim was to translate and cross-culturally adapt the Lower Extremity Functional Scale (LEFS) into Arabic language and to examine its measurement properties in patients with musculoskeletal disorders of the lower extremity. Methods: Standard forward and backward translation followed by expert committee review, then preliminary testing was carried out to produce the final Arabic version of LEFS (LEFS-Ar). The test–retest reliability, measurement error, internal consistency and construct validity of the LEFS-Ar were examined in patients with musculoskeletal disorders of the lower extremity (N?=?116). Results: The LEFS-Ar had excellent test–retest reliability (ICC_2,1?=?0.96). LEFS-Ar standard error of measurement was 3.5 points while the minimal detectable change MDC₉₅ was 9.8 points. LEFS-Ar showed excellent internal consistency with Cronbach’s alpha of 0.95. Parallel analysis and factor analysis showed that LEFS-Ar measures one underlying factor with all items loading heavily on this single factor. LEFS-Ar showed significant positive correlation with patient’s global assessment of function (r?=?0.59) and that patients recovering from surgery reported lower LEFS-Ar score compared to patients with no surgery further supporting the construct validity of the LEFS-Ar. Conclusion: LEFS-Ar has excellent internal consistency, test–retest reliability with relatively small measurement error and is a valid measure of activity limitation due to lower extremity musculoskeletal disorders. All these measurement properties of the LEFS-Ar suggest the clinical usefulness of this measure.

• Implications for Rehabilitation

• The Arabic Lower Extremity Functional Scale (LEFS-Ar) is a reliable and valid measure of activity limitation due to lower extremity musculoskeletal disorders with relatively small measurement error.

• LEFS-Ar can be used in daily clinical practice and for research purposes to quantify activity limitation in Arabic-speaking individuals with lower extremity musculoskeletal disorders.

     

Measurement properties of the Arm Function in Multiple Sclerosis Questionnaire (AMSQ): a study based on Classical Test Theory

Purpose: The construct validity, test–retest reliability, and measurement error of the Arm Function in Multiple Sclerosis Questionnaire (AMSQ) were examined. Additionally, the influence of administration-method on reliability and measurement error was investigated.

Method: 112 Dutch adult MS-patients from an academic- and a residential care-facility participated. Questionnaires were administered on paper, online or as interview, and patients performed several performance tests. Construct validity was assessed by testing pre-defined hypotheses. Reliability was assessed using Intraclass Correlation Coefficients (ICCs), Standard Error of Measurements (SEMs) and Smallest Detectable Changes (SDCs).

Results: For construct validity (N?=?105) 9 of 13 hypotheses were confirmed (69%). As expected, the AMSQ showed moderate to strong relationships with the instruments measuring similar constructs. The test–retest reliability coefficient was 0.96 (95% Confidence Interval 0.94–0.97); SEM was 6.3 (6.3% of scale range); SDC was 17.5 (on a sale from 0 to 100). Different administration-methods showed good reliability (ICC 0.88–0.94) and small standard errors (SEM 5.6–7.2).

Conclusion: The AMSQ shows satisfying results for validity and excellent reliability; allowing for proper use in research. Due to a large SDC value, caution is needed when using the AMSQ in individual patient care. Further research should determine whether the SDC is smaller than the minimal important change.

• Implications for Rehabilitation

• The Arm Function in Multiple Sclerosis Questionnaire (AMSQ) measures activity limitations due to hand and arm functioning in patients with Multiple Sclerosis (MS).

• Results of this study confirm adequate validity and reliability of the AMSQ in patient with MS.

• The equivalence of scores from online, paper or interview administration is supported.

• A change score of ≥18 points on the scale of the AMSQ (on a scale 0–100) needs to occur to be certain a change beyond measurement error has occurred in an individual patient.

     

Towards a short questionnaire for stepwise assessment of upper limb function,pain and stiffness in Duchenne muscular dystrophy

Purpose: Duchenne muscular dystrophy can lead to upper extremity limitations, pain and stiffness. In a previous study, these domains have been investigated using extensive questionnaires, which are too time-consuming for clinical practice. This study aimed at gaining insight into the underlying dimensions of these questionnaires, and to construct a short questionnaire that can be used for clinical assessment.

Methods: Exploratory factor analysis was performed on the responses of 213 participants to a web-based survey to find the underlying dimensions in the Capabilities of Upper Extremity questionnaire, the ABILHAND questionnaire, and questionnaires regarding pain and stiffness. Based on these underlying dimensions, a stepwise approach was formulated. In addition, construct validity of the factors was investigated.

Results: In total, 14 factors were identified. All had high internal consistency (Cronbach's alpha >0.89) and explained 80–88% of the variance of the original questionnaires. Construct validity was supported, because participants in the early ambulatory stage performed significantly better (pConclusion: The factors identified from the set of questionnaires provide a valid representation of upper extremity function, pain and stiffness in Duchenne muscular dystrophy. Based on the factor commonalities, the Upper Limb Short Questionnaire was formulated.

• Implications for Rehabilitation

• New insights into the underlying dimensions of upper extremity function, pain and stiffness in Duchenne muscular dystrophy are gained.

• Fourteen factors, with good internal consistency and construct validity, are identified regarding upper extremity function, pain and stiffness in Duchenne muscular dystrophy. Based on these factors, the Upper Limb Short Questionnaire is presented.

• The Upper Limb Short Questionnaire can be used as an identifier of arm-hand limitations and the start of more thorough clinical investigation.

     

Modeling quality of life in patients with rheumatic diseases: the role of pain catastrophizing,fear-avoidance beliefs,physical disability,and depression

Purpose: To examine factors in the fear-avoidance model, such as pain, pain catastrophizing, fear-avoidance beliefs, physical disability, and depression and their relationships with physical and psychological quality of life in patients with rheumatic diseases.

Materials and methods: The data were obtained from 360 patients with rheumatic diseases who completed self-report measures assessing study variables. Structural equation modeling was used to examine the hypothesized relationships among factors specified in the fear-avoidance model predicting physical and psychological quality of life.

Results: Final models fit the data well, explaining 96% and 82% of the variance in physical and psychological quality of life, respectively. Higher pain catastrophizing was related to stronger fear-avoidance beliefs that had a direct negative association with physical disability and depression, which, in turn, negatively affected physical quality of life. Pain severity was also directly related to physical disability. Physical disability also affected physical quality of life indirectly through depression. The hypothesized relationships specified in the model were also confirmed for psychological quality of life. However, physical disability had an indirect association with psychological quality of life via depression.

Conclusion: The current results underscore the significant role of cognitive, affective, and behavioral factors in perceived physical disability and their mediated detrimental effect on physical and psychological quality of life in patients with rheumatic diseases.

• Implications for rehabilitation

• The fear-avoidance model is applicable to the prediction of quality of life in patients with rheumatic diseases.

• As pain-catastrophizing and fear-avoidance beliefs are important factors linked to physical disability and depression, intervening these cognitive factors is necessary to improve physical function and depression in patients with rheumatic diseases.

• Considering the strong association between depression and physical and psychological quality of life, the assessment and treatment of the former should be included in the rehabilitation of patients with rheumatic diseases.

• Interventions targeting physical function and depression are likely to be effective in terms of improving physical and psychological quality of life in patients with rheumatic diseases.

     

Determinants of pain,disability, health-related quality of life and physical performance in patients with knee osteoarthritis awaiting total joint arthroplasty

Abstract

Purpose: In patients suffering from knee osteoarthritis awaiting knee arthroplasty, to measure associations between several selected determinants and pain, disability, health-related quality of life and physical performance.

Material and methods: Validated self-reported measures were collected: (1) Western Ontario and McMaster Universities Osteoarthritis Index, (2) Lower Extremity Functional Scale (LEFS) and (3) Short-Form 36 (SF-36). Physical performance was also assessed with four validated performance tests. Demographic, socioeconomic, psychosocial and clinical characteristics of the participants were also measured. Multivariate regression analyses were used to evaluate potential associations.

Results: Higher fear-avoidance beliefs, greater comorbidities, psychological distress and use of a walking aid were significantly associated with worse pain, function or HRQOL (p?<?0.05) and explained 12%–35% of the variances of the self-reported measure scores. Pretest pain and change in pain during posttest, greater comorbidities, psychological distress and use of a walking aid were significantly associated with worse performance on the physical tests (p?<?0.05) and explained 41%–59% of the variances of the different physical tests results.

Conclusions: Several determinants were significantly associated with worse pain, disability, health-related quality of life or physical performance. Several of these associations may be considered clinically important, including psychosocial determinants in relation to self-reported measures, but to physical performance as well.

• Implications for rehabilitation

• Knee osteoarthritis is a highly prevalent and disabling condition incurring important socioeconomic costs.

• Several modifiable determinants have been shown to contribute to pain and disability in individuals suffering from knee OA awaiting TKA.

• Recent studies demonstrated the efficacy of education and rehabilitation (prehabilitation) in individuals awaiting TKA.

     

Measurement properties of the Motor Evaluation Scale for Upper Extremity in Stroke patients (MESUPES)

Purpose: To investigate inter-rater reliability of the Motor Evaluation Scale for Upper Extremity in Stroke patients (MESUPES), to provide estimates of the minimal detectable change (MDC) of the MESUPES and to investigate concurrent validity in relation to the arm scores of the Modified Motor Assessment Scale (M MAS). Methods: Forty-two stroke patients (mean age 56?±?12 years) were independently assessed within a 48-hours window by two raters in different pairs (total available raters?=?4). Results: Weighted κ analysis indicated good to very good agreement at item level (range 0.63–0.96). The relative and absolute reliability of the total score of MESUPES (maximum 58) was high according to the intraclass correlation coefficients (ICC?=?0.98) and the standard error of measurement (SEM?=?2.68). The MDC for three levels of confidence was calculated: A score change of 8, 7 and 5 is necessary for a MDC to have confidence of 95%, 90% and 80%, respectively, of a genuine change. Correlation between the MESUPES and M MAS was high (r_s?=?0.87). Conclusions: The MESUPES shows high inter-rater reliability, and our study provides useful estimates of MDC for different levels of certainty. Additional research to confirm concurrent validity and to examine other psychometric properties of the MESUPES such as sensitivity is needed.

Implications for Rehabilitation

• This study shows that the Motor Evaluation Scale for Upper Extremity in Stroke patients (MESUPES) has high absolute and relative reliability.

• The MESUPES is suggested to be a useful tool to evaluate quality of movement in the upper extremity of stroke patients.

     

A review of culturally adapted versions of the Oswestry Disability Index: the adaptation process,construct validity,test–retest reliability and internal consistency

Abstract

The Oswestry Disability Index (ODI) is a self-report-based outcome measure used to quantify the extent of disability related to low back pain (LBP), a substantial contributor to workplace absenteeism. The ODI tool has been adapted for use by patients in several non-English speaking nations. It is unclear, however, if these adapted versions of the ODI are as credible as the original ODI developed for English-speaking nations. The objective of this study was to conduct a review of the literature to identify culturally adapted versions of the ODI and to report on the adaptation process, construct validity, test–retest reliability and internal consistency of these ODIs. Following a pragmatic review process, data were extracted from each study with regard to these four outcomes. While most studies applied adaptation processes in accordance with best-practice guidelines, there were some deviations. However, all studies reported high-quality psychometric properties: group mean construct validity was 0.734?±?0.094 (indicated via a correlation coefficient), test–retest reliability was 0.937?±?0.032 (indicated via an intraclass correlation coefficient) and internal consistency was 0.876?±?0.047 (indicated via Cronbach’s alpha). Researchers can be confident when using any of these culturally adapted ODIs, or when comparing and contrasting results between cultures where these versions were employed.

• Implications for Rehabilitation

• Low back pain is the second leading cause of disability in the world, behind only cancer.

• The Oswestry Disability Index (ODI) has been developed as a self-report outcome measure of low back pain for administration to patients.

• An understanding of the various cross-cultural adaptations of the ODI is important for more concerted multi-national research efforts.

• This review examines 16 cross-cultural adaptations of the ODI and should inform the work of health care and rehabilitation professionals.

     

High prevalence of early onset mental disorders among long-term disability claimants

Purpose: To provide information on prevalence, comorbidity, age-of-onset and severity of mental disorders among persons claiming disability after long-term sickness absence. Method: Cross-sectional analysis of a cohort of Dutch disability claimants (n?=?346). Composite International Diagnostic Interview (CIDI) 3.0 was used to generate DSM-IV classifications of mental disorder, age-of-onset and severity; registry data were used on demographics and ICD-10 classifications of somatic disorder. Results: The mean age of respondents was 49.8 (range 22–64). The most prevalent broad categories of mental disorders were mood and anxiety disorder with a 12-month prevalence of 28.6% and 32.9%, respectively. Mood and most anxiety disorders had ages of onset in adolescence and early adulthood. The phobias start at school age. Of all respondents, 33.7% had ≥1 12-month mental disorder. Co-occurrence of substance use disorders, phobias and depression/anxiety disorders is frequent. Urogenital and gastrointestinal diseases, and cancer coincide with 12-month mental disorder in 66.7%, 53.9% and 51.7% of cases, respectively. More than two out of three specific mental disorders are serious in terms of disability and days out of working role. Conclusions: Disability claimants constitute a vulnerable population with a high prevalence of serious mental disorder, substantial comorbidity and ages-of-onset in early working careers. More research is needed to help prevent long-term sickness absence and disability of claimants with mental health problems.

• Implications for Rehabilitation

• This study shows common mental disorders, such as mood and anxiety disorders, to be highly prevalent among persons claiming disability benefit after long-term sickness absence, to have early onsets and to often co-occur with somatic disorders.

• Professionals in primary and occupational health care should assess need for treatment of workers at risk, while at the same time being careful not to medicalize normal life problems.

• Insurance physicians assessing disability benefit claims should identify factors that caused claimants to call in sick and start interventions to promote return to work.

     

A comparative review of measurement instruments to inform and evaluate effectiveness of disability inclusive development

Abstract

Purpose: A review of existing measurement instruments was conducted to examine their suitability to measure disability prevalence and assess quality of life, protection of disability rights and community participation by people with disabilities, specifically within the context of development programs in low and middle-income countries. Methods: From a search of PubMed and the grey literature, potentially relevant measurement instruments were identified and examined for their content and psychometric properties, where possible. Criteria for inclusion were: based on the WHO’s International Classification of Functioning Disability and Health (ICF), used quantitative methods, suitable for population-based studies of disability inclusive development in English and published after 1990. Characteristics of existing instruments were analysed according to components of the ICF and quality of life domains. Results: Ten instruments were identified and reviewed according to the criteria listed above. Each version of instruments was analysed separately. Only three instruments included a component on quality of life. Domains from the ICF that were addressed by some but not all instruments included the environment, technology and communication. Conclusion: The measurement instruments reviewed covered the range of elements required to measure disability-inclusion within development contexts. However no single measurement instrument has the capacity to measure both disability prevalence and changes in quality of life according to contemporary disability paradigms. The review of measurement instruments supports the need for developing an instrument specifically intended to measure disability inclusive practice within development programs.

• Implications for Rehabilitation

• Surveys and tools are needed to plan disability inclusive development.

• Existing measurement tools to determine prevalence of disability, wellbeing, rights and access to the community were reviewed.

• No single validated tool exists for population-based studies, uses quantitative methods and the components of the ICF to measure prevalence of disability, well-being of people with disability and their access to their communities.

• A measurement tool that reflects the UNCRPD and addresses all components of the ICF is needed to assist in disability inclusive development, especially in low and mid resource countries.

     

The Jacket Test for assessing people with chronic stroke

Purpose: (1) To examine the intra-rater, inter-rater and test–retest reliability of Jacket Test times with 28 people with chronic stroke. (2) To determine the correlation of Jacket Test time with stroke-specific impairments. (3) To construct the optimal cutoff time for the Jacket Test that best discriminated 28 people with stroke from 30 healthy older adults.

Methods: The Jacket Test completion times were measured along with the Fugl–Meyer Upper Extremity Assessment, hand grip strength, 5-times Sit-to-stand test, Berg Balance Scale and timed “up and go” test, and Community Integration Measure using the cross-sectional design.

Results: The Jacket Test completion times showed excellent intra-rater, inter-rater and test–retest reliability (Intra-class Correlation Coefficient = 0.781–1.000). The unaffected-side Jacket Test times were significantly correlated with FMA-UE score, affected hand grip strength, Berg Balance Scale score, timed “up and go” test times and Community Integration Measure score. The affected-side Jacket Test times significantly correlated with affected hand grip strength. The cutoff time of 18.33s in affected side and 18.38s for unaffected side (sensitivity 96.7%; specificity 85.7–96.4%) was used to best discriminate the subjects with stroke and healthy older adults.

Conclusion: The Jacket Test is a reliable and valid measure tool in clinic to evaluate the upper extremity function in people with chronic stroke.

• Implication for rehabilitation

• The Jacket Test completion times has excellent intra-rater, inter-rater and test–retest reliabilities in patients with chronic stroke.

• The Jacket Test completion times significantly correlated with motor functions of the upper limbs.

• The Jacket Test completion times of 18.33s in affected side and 18.38s for unaffected side (sensitivity 96.7%; specificity 85.7%-96.4%) was found to be the most representative for discriminating chronic stroke survivors and healthy older adults.

• The Jacket Test is a reliable and valid measuring tool to evaluate the upper extremity function of people with chronic stroke.

     

The Spanish lower extremity functional scale: A reliable,valid and responsive questionnaire to assess musculoskeletal disorders in the lower extremity

Abstract

Purpose: The Lower Extremity Functional Scale (LEFS) is a widely used questionnaire to evaluate the functional impairment of a patient with a disorder of one or both lower extremities. It also can be used to monitor the patient over time and to evaluate the effectiveness of an intervention. Nevertheless there is no Spanish version of the LEFS, so the aim of this study was the translation and cross-cultural adaption of the Spanish version of the LEFS and to evaluate its psychometrics properties. Methods: The questionnaire was cross cultural adapted into Spanish. The psychometric properties tested in the Spanish version of the LEFS were: internal consistency, test–retest reliability, constructs validity, discriminative validity, responsiveness, concurrent validity and floor and ceiling effects in 132 participants seeking for treatment due to lower extremity dysfunction. Results: The Spanish version of the LEFS had high internal consistency (Cronbach’s α?=?0.989), test–retest reliability (ICC?=?0.998, 95% CI: 0.996–0.999) and presented a high correlation with the SF-36 (36-Item Short-Form Health Survey) especially with the physical function and pain subscales. The construct validity showed a single factor that account for 84.95% of the variance. The standard error of measurement of the Spanish version of the LEFS was 0.88 scale points (95% CI) and the minimal detectable change was 2.18 scale points (95% CI). The sample, collected from five Spanish physical therapy centers, was divided in groups (acute, sub-acute and chronic subjects). Within group changes showed a significant improvement on the LEFS score (p?<?0.001) and effect sizes were large in all conditions. The LEFS allowed to distingue between acute and not acute conditions; for this criterion ROC curve was performed at baseline (area under the curve [AUC]?=?0.95). There was no floor or ceiling effects. Conclusions: The Spanish version of the LEFS has been shown to be a valid and reliable tool to assess musculoskeletal dysfunction in the lower extremity that could be used with Spanish speaker population.

• Implications for Rehabilitation

• Cross-cultural adaptation of a self-reported questionnaire to evaluate musculoskeletal lower extremity disorders in the Spanish population.

• To provide Spanish clinicians and physiotherapists a useful tool to assess the lower extremity function.

• To provide Spanish researchers a valid tool for research on lower extremity function: patient’s improvement due to treatment, compare results obtained between populations, treatment.

     

Self-rated disability,fear-avoidance beliefs,nonorganic pain behaviors are important mediators of ranges of active motion in chronic whiplash patients

Abstract

Purpose: The influence of self-rated disability and fear-avoidance beliefs on whiplash sufferers in their performance of active ranges of motion has not been studied well. We undertook a cross-sectional study to determine this. Methods: Chronic whiplash subjects completed a standard clinical examination. They completed the Neck Disability Index (NDI), the Tampa Scale for Kinesiophobia (TSK) and pain visual analog scale (VAS). Active ranges of motion (goniometer) and cervical nonorganic simulation signs (C-NOSS) were obtained by the examiner. Univariate and multivariable analyses were conducted on these scores. Results: Sixty-four subjects (37 female) with a mean age of 41.4 (SD 16.1) years completed all scores. NDI, pain VAS and C-NOSS correlated significantly with ROM. In a multivariable model, only the NDI score contributed significantly to the variance of the ROM scores (14%). Conclusion: As chronic whiplash sufferers perform ROM in a clinical examination, these ranges are importantly influenced by their self-perceived disability. Cervical nonorganic simulation signs can be helpful in distinguishing high from very high levels of disability and motion restriction. The lack of correlation with the TSK may present a challenge to the Fear Avoidance Model in whiplash.

• Implications for Rehabilitation

• Self-ratings of disability in chronic whiplash sufferers are influenced by their fear-avoidance beliefs.

• While self-ratings of disability are known to predict chronicity of whiplash, there is less known about how these ratings affect impairment assessment during recovery.

• This study shows that self-ratings of disability influence the presentation of impairment by chronic whiplash sufferers with respect to their ranges of neck motion.

• Signs of nonorganic behavior also influence ranges of motion and self-ratings of disability.

• These findings should be incorporated into the interpretation of impairment findings in chronic whiplash sufferers in order to improve management.

     

Reliability,validity, and norms of the 2-min walk test in children with and without neuromuscular disorders aged 6–12

Purpose: The 2-min walk test may be more appropriate functional exercise test for young children. This study aimed to examine the 2-min walk test’s reliability; validity; and minimal clinically important difference; and to establish norms for children aged 6–12.

Methods: Sixty-one healthy children were recruited to examine the 2-min walk test’s reliability. Forty-six children with neuromuscular disorders (63% cerebral palsy) were recruited to test the validity. The normative study involved 716 healthy children without neuromuscular disorders (male?=?51%, female?=?49%). They walked at a self-selected speed for 2?min along a smooth, flat path 15 m in length.

Results: The mean distance covered in the 2-min walk test was 152.8 m (SD?=27.5). No significant difference was found in the children’s test-retest results (p?>?0.05). The intra- and inter-rater reliability were high (all intra-class correlation coefficients >0.8). All children, except one with neuromuscular disorders, completed the 2-min walk test, of which the minimal clinically important difference at 95% confidence interval was 23.2 m for the entire group, 15.7 m for children walking with aids, and 16.6 m for those walking independently.

Conclusions: The 2-min walk test is a feasible, reliable, and valid exercise test for children with and without neuromuscular disorders aged 6–12. The first normative references and minimal clinically important difference for children with neuromuscular disorders were established for children of this age group.

• Implications for rehabilitation

• The 2-min walk test is a feasible, safe, reliable, and valid time-based walk test for children aged 6–12 years.

• Normative references have been established for healthy children aged 6–12 years.

• Minimal clinically important difference at 95% confidence interval were calculated for children with neuromuscular disorders who walked without aids (i.e., independent and stand-by supervision) and those who walked with aids equal to 16.6 and 15.7 m, respectively.

• Distance covered by the healthy children in the 2?min did not correlate with age, gender, height, and weight of the children.

     

Rasch validation of the Arabic version of the lower extremity functional scale

Purpose: The purpose of this study was to examine the internal construct validity of the Arabic version of the Lower Extremity Functional Scale (20-item Arabic LEFS) using Rasch analysis.

Methods: Patients (n?=?170) with lower extremity musculoskeletal dysfunction were recruited. Rasch analysis of 20-item Arabic LEFS was performed. Once the initial Rasch analysis indicated that the 20-item Arabic LEFS did not fit the Rasch model, follow-up analyses were conducted to improve the fit of the scale to the Rasch measurement model. These modifications included removing misfitting individuals, changing item scoring structure, removing misfitting items, addressing bias caused by response dependency between items and differential item functioning (DIF).

Results: Initial analysis indicated deviation of the 20-item Arabic LEFS from the Rasch model. Disordered thresholds in eight items and response dependency between six items were detected with the scale as a whole did not meet the requirement of unidimensionality. Refinements led to a 15-item Arabic LEFS that demonstrated excellent internal consistency (person separation index [PSI]?=?0.92) and satisfied all the requirement of the Rasch model.

Conclusion: Rasch analysis did not support the 20-item Arabic LEFS as a unidimensional measure of lower extremity function. The refined 15-item Arabic LEFS met all the requirement of the Rasch model and hence is a valid objective measure of lower extremity function. The Rasch-validated 15-item Arabic LEFS needs to be further tested in an independent sample to confirm its fit to the Rasch measurement model.

• Implications for Rehabilitation

• The validity of the 20-item Arabic Lower Extremity Functional Scale to measure lower extremity function is not supported.

• The 15-item Arabic version of the LEFS is a valid measure of lower extremity function and can be used to quantify lower extremity function in patients with lower extremity musculoskeletal disorders.