Confirmatory Factor Analysis of the Work Limitations Questionnaire (WLQ-25) in Workers’ Compensation Claimants with Chronic Upper-Limb Disorders
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Purpose: To examine the factorial validity of the Work Limitations Questionnaire (WLQ-25) among workers’ compensation claimants with chronic upper-limb disorders. Methods: Attendees of the WSIB Shoulder and Elbow Specialty clinic in Toronto, Ontario, Canada, completed a survey that includes the WLQ-25 [4 subscales: time-management (TM), physical demands (PD), mental-interpersonal (MI), and output demands (OD)]. Confirmatory factor analyses (n = 2262) were conducted to evaluate and compare alternative 4- and 5-factor WLQ-25 structures [MI subscale intact vs. separated into mental demands (MD) and interpersonal demands (IP) subscales]. Model fit indices, saliency of factor loadings, and convergent/divergent validity of latent factors (r = 0.4 − 0.85 expected) were concurrently assessed. Results: The 4-factor WLQ-25 showed acceptable model fit after allowing the residuals of a pair of PD items to correlate (CFI = 0.924, TLI = 0.915, RMSEA = 0.057, SRMR = 0.054); however, significantly lower-than-expected correlations between the PD factor and all other factors (r = −0.11 – −0.03) were also observed. Model fit for the 5-factor WLQ-25 was even more optimal (CFI = 0.934, TLI = 0.925, RMSEA = 0.053, SRMR = 0.051), with MD and IP factors correlating at r = 0.83. Conclusions: Evidence of factorial validity was demonstrated by the WLQ-25; however, users should be attentive of an instrumentation issue that could be directly related to the psychometric performance of its PD subscale.
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About this Article
- Confirmatory Factor Analysis of the Work Limitations Questionnaire (WLQ-25) in Workers’ Compensation Claimants with Chronic Upper-Limb Disorders
Journal of Occupational Rehabilitation
Volume 23, Issue 2 , pp 228-238
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- Springer US
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- Factor analysis
- Work limitation
- Industry Sectors
- Author Affiliations
- 1. Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, ON, Canada
- 2. Mobility Program Clinical Research Unit, Li Ka Shing Knowledge Institute of St. Michael’s Hospital, 30 Bond Street, Toronto, ON, Canada
- 3. Institute for Work and Health, Toronto, ON, Canada
- 4. Behavioral Sciences, Epidemiology and Occupational Safety and Health, School of Public Health, The University of Texas Health Science Center at Houston, Houston, TX, USA
- 5. Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada
- 6. Division of Health Care and Outcomes Research, Toronto Western Research Institute, University Health Network, Toronto, ON, Canada
- 7. Division of Orthopaedics, University Health Network, Toronto, ON, Canada