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Table 3.

Synovial fluid oxidant activity; MDA and MPO levels, and antioxidant activity; CAT and GSH-Px levels in anti-CCP(+) and anti-CCP(-) patients with RA.

	Anti-CCP antibody	N	Mean	Std. Deviation	p value
Synovial GSHpx (U/ml)	negative	24	0.072	0.027	0.432
Synovial GSHpx (U/ml)	positive	25	0.074	0.032
Synovial CAT (k ml⁻¹)	negative	24	0.156	0.088	0.324
Synovial CAT (k ml⁻¹)	positive	25	0.145	0.086
Synovial MDA (nmol/ml)	negative	24	2.852	0.509	0.021*
Synovial MDA (nmol/ml)	positive	25	4.592	0.780
Synovial MPO (U/ml)	negative	24	3.134	2.125	0.037*
Synovial MPO (U/ml)	positive	25	4.783	2.654

*p<0.05