Table 1.

Mean baseline characteristics of the 813 patients in the ESPOIR cohort.

Characteristicsn = 813
Female/male624/189
Mean age, yrs48 ± 12.5
Disease duration, days103 ± 52
Swollen joint count, mean ± SD7.2 ± 5.4
Tender joint count, mean ± SD8.4 ± 7
DAS28, mean ± SD5.1 ± 1.3
ESR, mm/h29.5 ± 24.5
Elevated CRP, n (%)316 (38.9)
IgM RF, n (%)359 (44.2)
Anti-CCP, n (%)315 (38.7)
ACR criteria for RA, n (%)578 (71.3)
  • DAS28: Disease Activity Score on 28 joints; ESR: erythrocyte sedimentation rate; CRP: C-reactive protein; IgM RF: immunoglobulin M rheumatoid factor; CCP: cyclic citrullinated peptides; ACR: American College of Rheumatology; RA: rheumatoid arthritis.