Table 1

Characteristics of the patients

DemographicsRheumatoid arthritis (n = 25)Arthritis controls (n = 5)
*95% of healthy blood donors have values below 2 mg/l; †95% of healthy blood donors have values below 7.5 mg/l.
Age (years), mean (range)55 (34–76)38 (22–56)
Sex (female/male)19/60/5
Disease duration (years), mean (range)13 (3–32)9.4 (1–16)
RF (No positive)201
Swollen joint count, mean (range)17 (6–38)11 (0–30)
Tender joint count, mean (range)21 (2–41)11 (1–24)
Patient’s global assessment (mm), mean (range)7.3 (2.5–10.2)7 (5.6–9)
Physician’s global assessment (mm), mean (range)6.8 (3.8–10.2)6.7 (4.6–9)
ESR (mm/1st h), mean (range)50 (10–108)70 (16–104)
C reactive protein (mg/l), mean (range)*83 (5–272)28.5 (6.7–92)
S-amyloid protein A (mg/l), mean (range)†226 (14.5–495)199 (20–303)