Table 2.

Statistic tests of FPG level at first prenatal visit in diagnosing GDM

FPG level (mg/dL) at first prenatal visit	No of women < threshold, n (%)	Area	Sensitivity (%)	Specificity (%)	PPV (%)	NPV (%)	LR +	LR −
75	287	0.668	99.2	34.4	18	99.7	1.51	0.02
80	616	0.800	87.6	72.3	31.5	97.6	3.16	0.17
85	773	0.866	82.6	90.5	55.9	97.3	8.69	0.19
90	855	0.844	70.2	98.6	87.6	95.8	50.14	0.30
92	867	0.813	63.6	99	90.6	94.9	63.6	2.72

FPG fasting plasma glucose; PPV positive predictive value; NPV negative predictive value; LR likelihood ratio