Table 1.

Patient characteristics

	Rheumatoid arthritis patients	Healthy controls
Number	48	33
Age	56 ± 13	43 ± 13
% female	75	43
Disease duration (years)	12 ± 10	–
Cyclic citrullinated peptide IgG (units)	232 ± 397	–
Rheumatoid factor (IU/ml)	133 ± 236	–
C-reactive protein (mg/dl)	1 ± 1.75	–
Disease activity score	3.1 ± 1.5	–
DMARDs (%)	92%	–
TNFα inhibitors (%)	54%	–
Prednisone (%)	23%	–

DMARD, disease-modifying anti-rheumatic drug; TNF, tumor necrosis factor.