Concurrent Validity of Questionnaire and Performance-Based Disability Measurements in Patients with Chronic Nonspecific Low Back Pain
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This study aimed to investigate the concurrent validity of two approaches to disability measurement in patients with chronic nonspecific low back pain (CLBP). It was hypothesized that if both are measuring the same construct, the instruments would lead to similar disability results and would correlate strongly (r > 0.75). The study compared the results of self-reported and performance-based measures of disability in 64 consecutive patients with CLBP. Participants mean age was 38.0 years, the mean duration of the current episode of back pain 9.9 months, and 90% were off work due to CLBP. The self-report measures used were: the Roland Disability Questionnaire (Roland); the Oswestry Disability Questionnaire (Oswestry); and the Quebec Back Pain Disability Questionnaire (Quebec). Performance was measured using the Isernhagen Work Systems Functional Capacity Evaluation (FCE). The mean scores from the self-report measure are as follows: Roland 13.5 (scale 0–24), Oswestry 28.2 (scale 0–100), Quebec 37.8 (scale 0–100) consistent with moderate to severe disability. In contrast the results from the performance-based measures suggested that the subjects should be able to work at a physical intensity level of moderate to heavy. Little to moderate correlation was observed between the self-report and performance-based measures (Spearman rank correlations: Roland-FCE (−0.20), p > 0.05; Oswestry-FCE (−0.52), p < 0.01; Quebec-FCE (−0.50), p < 0.01). Results are interpreted to suggest that both performance-based and self-report measures of disability should be used in order to obtain a comprehensive picture of the disability in patients with CLBP.
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- Concurrent Validity of Questionnaire and Performance-Based Disability Measurements in Patients with Chronic Nonspecific Low Back Pain
Journal of Occupational Rehabilitation
Volume 12, Issue 3 , pp 119-129
- Cover Date
- Print ISSN
- Online ISSN
- Kluwer Academic Publishers-Plenum Publishers
- Additional Links
- concurrent validity
- functional status
- functional capacity evaluation
- Industry Sectors
- Author Affiliations
- 1. Center for Rehabilitation, University Hospital Groningen, Haren, The, Netherlands
- 2. Department of Occupational Psychology, University of Groningen, Groningen, The Netherlands
- 3. Institute for Human Movement Sciences, University of Groningen, Groningen, The Netherlands