Table 2.

Diagnostic accuracy measures for different cutoff points of the predicted probabilities for TREC in “Combined PID” and “Syndromic PID” diagnosis.

Cutoff point (probability)	PPV (%)	NPV (%)	Sensitivity (%)	Specificity (%)	Youden index
0.05	28	92	97	13	9.5
0.1	29	90	93	21	14.2
0.15	32	90	90	32	22
0.2	33	89	85	41	25.7
0.25	37	88	78	54	31.8
0.3	46	90	78	67	45.7
0.35	59	89	72	83	54.3
0.4	75	88	65	92	57.4

Optimum cut-off point based on maximum value of the J index is presented in bold.