Test-retest reliability and agreement of the work ability index - single item in persons with physical disabilities

R van Dinter*, A C Jenks, E H Roels, M W M Post, M F Reneman

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

OBJECTIVE: To assess the test-retest reliability and agreement of the WAS in persons with a physical disability.

DESIGN: Test-retest study, with a 2-4 week interval. Test-retest reliability was computed using the intraclass correlation coefficient (ICC). The agreement was analyzed using Bland-Altman plots.

SETTING: Vocational rehabilitation department of a rehabilitation center.

PARTICIPANTS: Patients with a physical disability (spinal cord injury, acquired brain injury, neuromuscular disease, or other).

INTERVENTION: Not applicable MAIN OUTCOME MEASURE: The WAS consists of one question on self-reported current work ability compared to their highest work ability ever, rated on a 0-10 scale.

RESULTS: Data from 44 patients were available and 22 patients reported no changes in work or medical situation between the two measurements. After excluding one outlier in this subgroup (n=21), the ICC was 0.89 (95% CI 0.76 to 0.96), the mean test-retest difference was -0.05 points and the LoA were ± 2.4 points.

CONCLUSION: The WAS is reliable for measuring work ability in persons with a physical disability. Using the WAS could be valuable as a routine outcome measure in vocational rehabilitation for persons with a physical disability.

Original languageEnglish
JournalArchives of Physical Medicine and Rehabilitation
DOIs
Publication statusE-pub ahead of print - 19-Nov-2024

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