Table 1

Patient characteristics at baseline (age range 18–55 years)

Sex
Total (n = 594)Female (n = 394)Male (n = 200)
Age, years40.0 (9.3)40.4 (9.1)39.1 (9.6)
Disease duration, years9.4 (8.5)9.3 (8.6)9.6 (8.5)
C-reactive protein, mg/dl (median)13.011.018.5
Erythrocyte sedimentation rate, mm/h (median)212122
No. of tender joints (median)564
No. of swollen joints (median)674
Rheumatoid factor positive (%)82%82%80%
HAQ*1.0 (0.6)1.1 (0.6)†0.9 (0.6)
DAS*4.7 (1.4)4.9 (1.3)†4.3 (1.4)
Pain VAS*54 (24)55 (25)52 (24)
Hours worked/week20 (18)19 (17)21 (18)
  • Data are expressed as mean (SD) unless otherwise stated.

  • *HAQ n = 528 (355 F, 173 M); DAS n = 521 (354 F, 167 M); pain VAS n = 543 (367 F, 176 M); †p<0.001 for sex difference.

  • DAS, Disease Activity Score; F, female; HAQ, Health Assessment Questionnaire; M, male; VAS, visual analogue scale.