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  • Title: Validation of the work-ability support scale in individuals seeking to return to work after severe acquired brain injury.
    Author: Gates TM, Daher M, McRae P, Simpson GK.
    Journal: Disabil Rehabil; 2024 Jul; 46(14):3164-3175. PubMed ID: 37606282.
    Abstract:
    PURPOSE: To assess the reliability and validity of the work-ability support scale (WSS) in a severe traumatic/acquired brain injury (TBI/ABI) population seeking to return to work (RTW). MATERIALS AND METHODS: One hundred forty-four clients were enrolled in a vocational rehabilitation (VR) intervention trial through the Brain Injury Rehabilitation Program in New South Wales, Australia. Each client's primary brain injury clinician and VR provider completed the WSS pre- and post-intervention. Validating measures assessing dysexecutive behavior, disability, participation, and work instability were completed. Several aspects of reliability and validity were evaluated. RESULTS: Internal consistency was excellent for Part A (Cronbach's αs > 0.9) but unacceptably low to questionable for Part B (αs < 0.6). Inter-rater reliability between clinicians and VR providers was generally fair to moderate for Part A (κw < 0.6) and worse for Part B (κw < 0.5), with both slightly improving at post-intervention. Strong support was found for predictive and convergent validity, but not divergent validity. Confirmatory factor analysis indicated a poor fit for Part A, whereas most Part B fit indices met criteria. CONCLUSIONS: The WSS can play a useful role in assessing return to work (RTW) potential, planning and evaluation after severe TBI/ABI. Training could improve consistency of administration among staff working across health and VR service sectors. The work-ability support scale (WSS) has potential as a screening tool in assisting return to work (RTW) assessment, planning, and evaluation, following severe traumatic brain injury and acquired brain injury.Employment success following a RTW intervention was predicted by the initial WSS Part A total score.The low inter-rater reliability between brain injury clinicians in health settings and vocational rehabilitation providers suggests that training will be important to improve consistency in WSS administration across service sectors.
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