Table 3 Baseline patient characteristics of patients with rheumatoid arthritis from the replication cohort for three categories of the body mass index (BMI)
Baseline characteristicsBMI <25 (n = 110)BMI 25 to <30 (n = 101)BMI ⩾30 (n = 36)
Age (years)53.1 (14.7)55.9 (12.5)54.2 (10.4)
Female, No (%)84 (76)57 (56)31 (86)
CRP (mg/l)43.7 (54.7)39.2 (40.0)27.0 (27.1)
Swollen joints (n)14.7 (6.4)16.0 (7.0)13.2 (6.5)
VAS morning stiffness (0–100 mm)60.6 (22.7)59.1 (22.9)54.4 (22.7)
VAS patients’ global health (0–100 mm)51.9 (19.7)52.0 (20.5)51.7 (17.1)
Sharp–van der Heijde score (0–448)7.6 (9.3)5.8 (6.7)7.3 (9.2)
Anti-CCP+, No (%)*66 (66)56 (60)19 (59)
Smoking+, No (%)45 (41)36 (36)11 (31)
  • Results are shown as mean (SD) unless stated otherwise.

  • *Data on anti-CCP antibodies were missing for the three BMI categories in 10, 7 and 4 patients, respectively. Gender was differently distributed between the patients with BMI 25 to <30 and ⩾30 (p<0.001). The other variables were not significantly different between the three BMI categories.

  • Anti-CCP, anti-cyclic citrullinated protein; CRP, C reactive protein; VAS, visual analogue scale.