Test-retest reliability and correlations of 5 global measures addressing at-work productivity loss in patients with rheumatic diseases

Publication type
Journal article
Authors
Leggett S, Zee-Neuen A, Boonen A, Beaton DE, Bojinca M, Bosworth A, Dadoun S, Fautrel B, Hagel S, Hofstetter C, Lacaille D, Linton D, Mihai C, Petersson IF, Rogers P, Sergeant JC, Scire C, Verstappen SM
Date published
2016 Feb 01
Journal
Journal of Rheumatology
Volume
43
Issue
2
Pages
433
Open Access?
No
Abstract

OBJECTIVE: Several global measures to assess at-work productivity loss or presenteeism in patients with rheumatic diseases have been proposed, but the comparative validity is hampered by the lack of data on test-retest reliability and comparative concurrent and construct validity. Our objective was to test-retest 5 global measures of presenteeism and to compare the association between these scales and health-related well-being. METHODS: Sixty-five participants with inflammatory arthritis or osteoarthritis in paid employment were recruited from 7 countries (UK, Canada, Netherlands, France, Sweden, Romania, and Italy). At baseline and 2 weeks later, 5 global measures of presenteeism were evaluated: the Work Productivity Scale-Rheumatoid Arthritis (WPS-RA), Work Productivity and Activity Impairment Questionnaire (WPAI), Work Ability Index (WAI), Quality and Quantity questionnaire (QQ), and the WHO Health and Performance Questionnaire (HPQ). Agreement between the 2 timepoints was assessed using single-measure intraclass correlations (ICC) and correlated between each other and with visual analog scale general well-being scores at followup by Spearman correlation. RESULTS: ICC between measures ranged from fair (HPQ 0.59) to excellent (WPS-RA 0.78). Spearman correlations between measures were moderate (Qquality vs WAI, r = 0.51) to strong (WPS-RA vs WPAI, r = 0.88). Correlations between measures and general well-being were low to moderate, ranging from -0.44