Table 3.

Correlation coefficient study between enzymes activity and RA biomarkers

Parameter	Test	ARE activity (U/l)	RF (IU/ml)	Anti-CCP-2 (U/ml)
PON-1 activity (nmol/min/ml)	r	0.66	−0.77	−0.85
	P	0.001*	0.001*	0.001*
ARE (U/l)	r		0.23	0.36
	p		0.156	0.18
RF (IU/ml)	r			0.77
	P			>0.001*

P* value was significant at <0.001.