Table 1.

Characteristics of RA patients and healthy controls

Demographics	Active RA (n = 25)	Healthy (n = 20)
Age (years), mean (range)	51.2 (32–70)	50.8 (35–71)
Sex, female/male	21/4	17/3
Disease duration (years), mean (range)	8.4 (1–22)	–
RF, positive/negative	16/9	–
ESR (mm/h), mean (range)	49.4 (27–79)	8.4 (4–19)
CRP (mg/L), mean (range)	60.3 (22–149)	2.8 (1–7)
Mean DAS28	5.6 (4.4–7.2)	–
Treatment, +/−	13/12	–

RF Rheumatoid factor, ESR Erythrocyte sedimentation rate, CRP C-reactive protein; DAS28 Disease Activity Score in 28 joints.