Table 1.

Characteristics of study subjects

	RA patients	Healthy controls
Sex women/men	93/13	39/17
Age (year) (mean ± SEM)	50.7 ± 1.2	43.2 ± 1.9
ACPA (UI/l) (mean ± SD)	322.2 ± 282.1	ND
RF (U/ml) (mean ± SD)	431.2 ± 701.98	ND
ESR mm/h (mean ± SD)	32.4 ± 13.25	19.2 ± 11.36
CRP mg/dl (mean ± SD)	1.35 ± 1.74	0.33 ± 0.07
Years after onset (year) (Mean ± SEM)	9.4 ± 0.81	ND
Previous rheumatoid nodules (%/n)	9.43% (10)	0% (0)
Current rheumatoid nodules (%/n)	16% (17)	0% (0)
Previous Raynaud’s phenomenon (%/n)	0.9% (1)	0% (0)
Current Raynaud’s phenomenon (%/n)	1.8% (2)	0% (0)
Previous cutaneous vasculitis (%/n)	0% (0)	0% (0)
Current cutaneous vasculitis (%/n)	0.9% (1)	0% (0)
Bone erosion (%/n)	79.2% (84)	0% (0)

ND not determined