Table 2.

Difference in the serological parameter in the CCP-negative versus CCP-positive patients with RA

	Anti-CCP positive patients (n = 20)	Anti-CCP negative patients (n = 20)	P-value
Age	47.2 ± 14.5	49.5 ± 11	0.593
ESR	25.9 ± 19.4	32.5 ± 26	0.373
CRP	1.5 ± 2.4	2.2 ± 3.7	0.440
Disease duration	7.4 ± 7.5	6.2 ± 5.7	0.614
VAS	5.1 ± 1.7	4.5 ± 1.6	0.313
DAS28	4.1 ± 1.3	3.8 ± 1.4	0.459
RF (+)	18/20 (90)	8/20 (40)	0.001
HLADR3 (+)	1 /19 (5.3)	3/19 (17.6)	0.258
HLADR4 (+)	4 /15 (21.1)	6/17 (35.3)	0.341