Table 3.

Receiver operating characteristic (ROC) data for serum concentrations of metalloproteinases, inflammatory cytokines, and cartilage turnover markers in the study (PsA) group

Paramter	MMP-1	MMP-3	IL-18	IL-20	YKL-40	COMP
Cut-off value*	5.90	14.30	40.18	57.40	34.40	1935.00
Youden’s Index	0.54	0.69	0.57	0.52	0.26	0.96
AUC	0.76	0.89	0.81	0.75	0.60	1.00
P-value	0.0007	0.0000	0.0001	0.0039	0.2635	0.0000

^*The values are given as ng/ml (MMP-1, MMP-3, COMP, YKL-40) and pg/ml (IL-18, IL-20).