Table 3.

Acute-phase reagents, disease activity measures, and the number of affected joints

Variable	Mean ± SD	Median (quartis)
ESR (mm/hour)	26 ± 19	20.00 (13.00; 33.00)
CRP (mg/L)	2.6 ± 3.6	1.29 (0.57; 2.71)
Ferritin (ng/mL)	145 ± 115	107.00 (62.25; 188.00)
DAS 28 ESR	4.84 ± 1.04	4.76 (4.28; 5.32)
DAS 28 CRP	4.04 ± 0.95	3.93 (3.49; 4.39)
Clinical Disease Activity Index	21.25 ± 12.24	18.00 (13.00; 24.75)

CRP = C-reactive protein; DAS 28 = disease activity score (28 joints); ESR = erythrocyte sedimentation rate.