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Table 1 Demographic and clinical characteristics of randomly assigned patients (modified intent-to-treat population) at baseline

From: Discriminant validity, responsiveness and reliability of the rheumatoid arthritis-specific Work Productivity Survey (WPS-RA)

  All randomly assigned
(n = 220)
Mean age (range), years 53.8 (21 to 80)
Female gender, number (percentage) 184 (83.6%)
Caucasians, number (percentage) 177 (80.5%)
Country, number (percentage)  
   Austria 3 (1.4%)
   Czech Republic 52 (23.6%)
   United States 165 (75%)
Employment statusa, number (percentage)  
   Employed outside the home 85 (38.6%)
   Homemakers 23 (10.5%)
   Retired 55 (25.0%)
   Unable to work due to arthritis 44 (20.0%)
   Other 13 (5.9%)
Job function if employeda, number (percentage)  
   Non-manual 41 (48.2%)
   Manual with no supervisory duties 14 (16.5%)
   Mixed (manual and non-manual) 30 (35.3%)
Mean duration of RA (SD), years 9.52 (8.93)
Mean age at RA onset (SD), years 44.31 (13.57)
Mean disease activity, DAS28(3) (SD) 6.31 (1.0)
DAS28(3) group with DAS28 of >5.1, number (percentage) 196 (89.1%)
Mean number of prior DMARDs (range) 2 (0 to 8)
  1. aCaptured by the Work Productivity Survey – Rheumatoid Arthritis (WPS-RA). DAS, disease activity score; DAS28, disease activity score using 28 joint counts; DMARD, disease-modifying anti-rheumatic drug; RA, rheumatoid arthritis; SD, standard deviation.