OBJECTIVE: To evaluate the reliability and validity of WHODAS II within the spinal cord injury population. SUBJECTS: Sixty-three people with traumatic spinal cord injury. METHODS: The World Health Organization Disability Assessment Scale II (WHODAS II), Craig Handicap Assessment and Reporting Technique, and Medical Outcomes Study 36-item Short-Form Health Survey (MOS SF-36) were administered at 2 years post discharge from rehabilitation. Distribution, reliability, discriminant validity, and convergent/divergent validity were evaluated using classical tests. Rasch analyses were applied to assess dimensionality, item spread, and person/item reliability. RESULTS: Cronbach's alpha coefficients ranged from 0.61 (getting around) to 0.97 (participation). Ceiling effects were present in 4 out of 6 domains. WHODAS II discriminated between levels of impairment and work force status on 'self-care', 'getting around', 'life activities', and total score. Correlations with MOS SF-36 supported convergent/divergent validity. Five items didn't fit the Rasch model. The item/person map reveald a shortage of items able to differentiate the more able person. WHODAS II demonstrated good person and item separation and reliability. CONCLUSION: This study provides preliminary support for reliability and validity of WHODAS II in a spinal cord injured population. Limitations were noted for dimensionality and item person distribution. Findings need to be confirmed in larger samples.
OBJECTIVE: To evaluate the reliability and validity of WHODAS II within the spinal cord injury population. SUBJECTS: Sixty-three people with traumatic spinal cord injury. METHODS: The World Health Organization Disability Assessment Scale II (WHODAS II), Craig Handicap Assessment and Reporting Technique, and Medical Outcomes Study 36-item Short-Form Health Survey (MOS SF-36) were administered at 2 years post discharge from rehabilitation. Distribution, reliability, discriminant validity, and convergent/divergent validity were evaluated using classical tests. Rasch analyses were applied to assess dimensionality, item spread, and person/item reliability. RESULTS: Cronbach's alpha coefficients ranged from 0.61 (getting around) to 0.97 (participation). Ceiling effects were present in 4 out of 6 domains. WHODAS II discriminated between levels of impairment and work force status on 'self-care', 'getting around', 'life activities', and total score. Correlations with MOS SF-36 supported convergent/divergent validity. Five items didn't fit the Rasch model. The item/person map reveald a shortage of items able to differentiate the more able person. WHODAS II demonstrated good person and item separation and reliability. CONCLUSION: This study provides preliminary support for reliability and validity of WHODAS II in a spinal cord injured population. Limitations were noted for dimensionality and item person distribution. Findings need to be confirmed in larger samples.
Authors: Noelle E Carlozzi; Siera Goodnight; Anna L Kratz; Julie C Stout; Michael K McCormack; Jane S Paulsen; Nicholas R Boileau; David Cella; Rebecca E Ready Journal: J Huntingtons Dis Date: 2019
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Authors: Nora E Fritz; Nicholas R Boileau; Julie C Stout; Rebecca Ready; Joel S Perlmutter; Jane S Paulsen; Kimberly Quaid; Stacey Barton; Michael K McCormack; Susan L Perlman; Noelle E Carlozzi Journal: J Neuropsychiatry Clin Neurosci Date: 2018-03-21 Impact factor: 2.198
Authors: N E Carlozzi; S G Schilling; J-S Lai; J S Paulsen; E A Hahn; J S Perlmutter; C A Ross; N R Downing; A L Kratz; M K McCormack; M A Nance; K A Quaid; J C Stout; R C Gershon; R E Ready; J A Miner; S K Barton; S L Perlman; S M Rao; S Frank; I Shoulson; H Marin; M D Geschwind; P Dayalu; S M Goodnight; D Cella Journal: Qual Life Res Date: 2016-08-13 Impact factor: 4.147