TABLE 5.

Results of ROC analyses for the MDD and DD.

	Diagnosis for MDD					Diagnosis for DD
n cases/n controls	96/1049					188/957
AUC (95% CI)	0.915 (0.889–0.941)					0.846 (0.813–0.880)
Cut off	SEN	SPE	J	PPVb	NPV	SEN	SPE	J	PPV	NPV
MDD optimal cut off a = 23	0.833	0.868	0.701	0.365	0.983	0.649	0.899	0.548	0.557	0.929
DD optimal cut off = 17	0.917	0.724	0.641	0.233	0.99	0.809	0.764	0.573	0.402	0.953
BDI-II mild = 14	0.938	0.636	0.574	0.191	0.991	0.830	0.670	0.5	0.331	0.953
BDI-II moderate = 20	0.885	0.808	0.693	0.297	0.987	0.718	0.842	0.56	0.472	0.938
BDI-II severe = 29	0.656	0.937	0.593	0.488	0.968	0.484	0.960	0.444	0.705	0.905

AUC, area under curve; CI, confidence interval; MDD, major depressive disorder; DD, depressive related disorder; SEN, sensitivity; SPE, specificity; J, Youden’s index; PPV, positive predictive value; NPV, negative predictive value. ^aCut off score with the highest Youden’s index value. ^bPPV and NPV was calculated based on the prevalence from the research data.