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Measuring Work Related Physical and Mental Health Function: Updating the Work Disability Functional Assessment
Elizabeth E Marfeo1, Christine McDonough, Pengsheng Ni
1Department of Occupational Therapy, Tufts University, Medford, MA (Dr Marfeo); Department of Physical Therapy, School of Health and Rehabilitation Sciences, University of Pittsburgh, Pittsburgh, PA (Dr McDonough); Department of Health Law Policy and Management, Boston University School of Public Health, Boston, MA (Dr Ni, Ms Peterik, Mr Kazis); National Institutes of Health Rehabilitation Medicine Department, Bethesda, MD (Ms Porcino, Dr Rasch, Dr Chan); Veterans Health Administration Office of Reporting, Analytics, Performance, Improvement and Deployment (RAPID), Boston MA (Dr Meterko).
Objective:
To further improve measurement of work-related physical and mental health by updating the Work Disability Assessment Battery (WD-FAB).
Methods:
Cross-sectional study with 1024 disability claimants and 1000 working age (21 to 66 years) adults in the United States. Developed new items to replenish the WD-FAB and analyzed using factor analysis and item response theory (IRT). Computer adaptive testing (CAT) simulations evaluated the psychometric properties of the original versus updated WD-FAB.
Results:
Analyses confirmed the structure of the WD-FAB. Twenty-three new items were added (basic mobility: 7, upper body function: 4, fine motor: 6, self-regulation: 1, resilience & sociability: 5 items).
Conclusions:
Findings support the WD-FAB as a robust, psychometrically sound assessment of work-related function. Extensive content coverage (331 items) represents eight physical and mental health domains. IRT/CAT methods allow administration in under 15 minutes. The WD-FAB may prove valuable for efficiently characterizing work-related function across work rehabilitation settings.
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