Table 4.

Statistic tests of FPG level at 24–28th of gestational weeks in diagnosing GDM

FPG (mg/dL) at OGTT	No of women < threshold, n (%)	Area	Sensitivity (%)	Specificity (%)	PPV (%)	NPV (%)	LR +	LR −
75	269	0.657	99.2	32.3	17.6	99.6	1.46	0.02
80	524	0.801	97.5	62.7	27.6	99.4	2.61	0.03
85	702	0.903	96.7	84	46.8	99.4	6.04	0.03
90	828	0.946	90.9	98.3	88.7	98.7	53.47	0.09
92	847	0.934	86.8	100	100	98.1	–	0.13

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