Table 4.

Cutoff point analysis—total group and age stratification.

Variable	Cutoff point	Sensitivity	Specificity	Youden index
Age
Total	≤38	0.407	0.890	0.296
bFSH
Total	≤9.8	0.384	0.900	0.283
<35	≤9.62	0.354	0.900	0.254
35–38	≤10.18	0.351	0.900	0.251
38–40	≤10.49	0.362	0.900	0.262
>40	≤11.51	0.320	0.900	0.220
AFC
Total	≤5	0.559	0.908	0.467
<35	≤6	0.538	0.895	0.434
35–38	≤4	0.377	0.925	0.303
38–40	≤3	0.319	0.933	0.252
>40	≤3	0.465	0.875	0.340
AMH
Total	≤1.18	0.633	0.900	0.534
<35	≤1.37	0.607	0.900	0.508
35–38	≤1.02	0.538	0.901	0.438
38–40	≤0.8	0.493	0.899	0.392
>40	≤0.61	0.518	0.899	0.417