Activity limitation and participation restrictions of breast cancer patients receiving chemotherapy: psychometric properties and validation of the Chinese version of the WHODAS 2.0.
ABSTRACT PURPOSE: This study sought to determine the psychometric properties of the Chinese version of the World Health Organization Disability Assessment Schedule 2.0 (WHODAS 2.0) in a sample of 402 primary breast cancer patients receiving chemotherapy after surgery. METHODS: Four-hundred and two subjects were interviewed with the Chinese version of the WHODAS 2.0. Patients also completed the Functional Assessment of Cancer Therapy-Breast (FACT-B). Internal consistency reliability was measured by Cronbach's α. Spearman correlation coefficients between total scores and subscales of FACT-B and WHODAS 2.0 were examined to get the convergent validity. Independent sample t test was applied to test discriminant validity by comparing the difference of disability scores for different degree of relevant symptoms. The factor structure of the WHODAS 2.0 was examined by Exploratory Factor Analysis (EFA) and Confirmatory Factor Analysis. RESULTS: The Chinese version of the WHODAS 2.0 showed satisfactory internal consistency (r, 0.72-0.92), convergent validity and discriminant validity. After 4 items(item D2.2: standing up; D3.3: eating; D4.5: sexual activities; and D6.3: living with dignity) were excluded, EFA identified seven separate factors for 'Self-care and Household activities,' 'Getting along with people,' 'Getting around,' 'Understanding,' 'Communicating,' 'Participation in society' and 'Family burden'(explained variance 72.13 %). The reduced model also presented the best fit [Confirmatory Fit Index = 0.914, Tucker-Lewis Index = 0.900, Root Mean Square Error of Approximation = 0.069] compared with the model suggested by EFA and hypothesized a prior. CONCLUSIONS: Overall, the Chinese version of the WHODAS 2.0 is a reliable and valid instrument for measuring activity limitation and participation restrictions in Chinese breast cancer patients receiving chemotherapy.
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ABSTRACT: The WHODAS 2.0 is an ICF-based multidimensional instrument developed for measuring disability. The present study analyzes the utility of the 36-item interviewer-administered version in a sample of patients with bipolar disorder. There is no study to date that analyses how the scale works in a sample that only comprises such patients. A total of 291 patients with bipolar disorder (42.6% males) according to DSM-IV-TR criteria from a cross-sectional study conducted in outpatient psychiatric clinics were enrolled. In addition to the WHODAS 2.0, patients completed a comprehensive assessment battery including measures on psychopathology, functionality and quality of life. Analyses were centered on providing evidence on the validity and utility of the Spanish version of the WHODAS 2.0 in bipolar patients. Participation domain had the highest percentage of missing data (2.7%). Confirmatory factorial analysis was used to test three models formulated in the literature: six primary correlated factors, six primary factors with a single second-order factor, and six primary factors with two second-order factors. The three models were plausible, although the one formed by six correlated factors produced the best fit. Cronbach's alpha values ranged between .73 for the Self-care domain and .92 for Life activities, and the internal consistency of the total score was .96. Relationships between the WHODAS 2.0 and measures of psychopathology, functionality and quality of life were in the expected direction, and the scale was found to be able to differentiate among patients with different intensity of clinical symptoms and work situation. The percentage of euthymic patients was considerable. However, the assessment of euthymic patients is less influenced by mood. Some psychometric properties have not been studied, such as score stability and sensitivity to change. The Spanish version of the 36-item WHODAS 2.0 has suitable psychometric properties in terms of reliability and validity when applied to patients with bipolar disorder. Disability in bipolar patients is especially prominent in Cognition, Getting along, Life activities, and Participation domains, so functional remediation interventions should emphasize these areas in order to improve the daily living activities of these patients. Copyright © 2014 Elsevier B.V. All rights reserved.Journal of Affective Disorders 12/2014; 174C:353-360. DOI:10.1016/j.jad.2014.12.028 · 3.71 Impact Factor
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ABSTRACT: Background World Health Organization Disability Assessment Schedule 2.0 (WHODAS 2.0) provided a standardized method for measuring the health and disability and the traditional Chinese version has not been developed. Aims To describe the process of developing the traditional Chinese version of the WHODAS 2.0 36-item version and to evaluate the concurrent validity and test–retest reliability of this instrument. Methods The study was conducted in two phases. Phase I was the process of translation of WHODAS 2.0 36-item version. Phase II was a cross-sectional study. The participants were 307 adults who were tested the validity and reliability of draft traditional Chinese version. Results The reliability of Cronbach's α and ICC in the WHODAS 2.0 traditional Chinese version were 0.73–0.99 and 0.8–089, respectively. The content validity was good (r = 0.7–0.76), and the concurrent validity was excellent in comparison with the WHOQOL-BREF (p < 0.5). The construct validity, the model was explained total variance was 67.26% by the exploratory factor analysis (EFA) and the confirmatory factor analysis (CFA) illustrated the traditional Chinese version was good to assess disability. There was a valid and reliable measurement scales for evaluating functioning and disability status. Conclusion For disability eligibility system of Taiwan government to measure the disability, the traditional Chinese version of the WHODAS 2.0 provided valuable evidence to design the assessment instrument.
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ABSTRACT: World Health Organization Disability Assessment Schedule 2.0 (WHODAS 2.0) provided a standardized method for measuring the health and disability and the traditional Chinese version has not been developed.Research in Developmental Disabilities 08/2014; 35(11):2812-2820. DOI:10.1016/j.ridd.2014.07.009 · 3.40 Impact Factor