Table 1.

Demographic, clinical, and laboratory characteristics of rheumatoid arthritis patients. Unless otherwise stated, the number of patients analyzed was 404.

Characteristics
Female sex367 (90.8%)
Age, yrs, median ± SD53.18 ± 11.59; range 18–89
Ethnicity, n = 393, n (%)
   European-derived174 (44.3)
   Mulatto167 (42.5)
   African-derived48 (12.2)
   Asian-derived4 (1.0)
Disease duration, yrs, median ± SD11.16 ± 7.78; range 2–48
   Functional class, n = 377, n (%)
   Functional class I,164 (43.5)
   Functional class II138 (36.6)
   Functional class III60 (15.9)
   Functional class IV15 (4.0 )
Health Assessment Questionnaire score, n = 396, median ± SD0.65 ± 0.59; range 0–2.38
Presence of extraarticular manifestations, n = 363115 (31.7%)
Drugs
   Methotrexate295 (73.0%)
   Prednisone244 (60.4%)
   Antimalarials128 (31.7%)
   Leflunomide119 (29.5%)
   Sulfasalazine38 (9.4%)
   Immunobiologicals21 (5.2%)
RF-positive ≥ 20 IU/ml, n = 390248 (61.4%)
ACPA-positive > 20 U/ml, n = 390307 (76.0%)
Height, meters, median ± SD1.58 ± 0.07; range 1.34–1.83
Body mass index, n = 272, mean ± SD26.70 ± 4.60; range 16.65–41.66
Total Sharp score, mean ± SD109.7 ± 74.8; range 0–379
  • RF: rheumatoid factor; ACPA: anticitrullinated peptide antibody.