TABLE 6.

ROC curve and Youden index analysis of phthalate metabolites in urine samples of the case group (n = 107).

Phthalate metabolite	AUC	SD	p-Value	95% CI	Concentration at maximum youden index (mg/L)
DMP	0.653	0.047	0.001	0.561–0.745	0.008
MMP	0.646	0.043	0.001	0.563–0.730	0.004
DEP	0.628	0.044	0.004	0.541–0.714	0.035
MEP	0.635	0.043	0.002	0.550–0.720	0.066
DBP	0.592	0.034	0.039	0.509–0.676	0.423
MBP	0.730	0.039	<0.001	0.654–0.856	0.017
BBzP	0.612	0.045	0.012	0.524–0.077	0.003
MBzP	0.591	0.043	0.042	0.506–0.676	0.293
DEHP	0.925	0.024	<0.001	0.878–0.972	0.013
MEHP	0.839	0.029	<0.001	0.781–0.896	0.008
DEHP + MEHP	0.972	0.012	<0.001	0.949–0.995	—
DEHP + MBP	0.939	0.021	<0.001	0.898–0.979	—
MBP + MEHP	0.847	0.029	<0.001	0.791–0.904	—
DEHP + MEHP + MBP	0.974	0.011	<0.001	0.953–0.995	—

Abbreviations: AUC: area under the curve; SD: standard deviation.