Table 1.

The serum levels of ferritin, CRP, and ESR in patients with RA and other groups (values are given as means±SE)

Groups	ESR (mm/hr)	CRP (mg/dL)	Ferritin (ng/mL)
Malignancy group (n=33)	53.5±6.9	2.9±0.9	364.4±70.2*
Infection group (n=32)	57.8±6.8	12.3±1.6*	466.4±84.5*
Rheumatoid arthritis (n=44)	63.7±6.2	3.8±0.8	81.0±11.9
SLE (n=20)	50.1±7.4	1.2±0.3	191.8±85.1
Healthy control (n=21)	18.7±2.9*	0.6±0.1	80.8±14.9

ESR: erythrocyte sedimentation rate; CRP: c-reactive protein; SLE: systemic lupus erythematosus

^(*)p<0.001 Different from other groups