Table 5.

Area under the receiver operating characteristic curve (AUC), sensitivity and specificity when applying the optimized cut-off points for the C reactive protein/albumin ratio, neutrophil/lymphocyte ratio, and platelet/lymphocyte ratio in predicting high psoriatic arthritis impact of disease

	AUC (95% confidence interval)	Cut-off according to Youden’s Index	Sensitivity (%)	Specificity (%)
C reactive protein/albumin ratio	0.901 (0.855-0.947)	0.98	70	98
Neutrophil/lymphocyte ratio	0.759 (0.680-0.838)	2.30	66	78
Platelet/lymphocyte ratio	0.686 (0.591-0.782)	120.64	66	71