The Role of Untimed Blood Glucose in Screening for Gestational Diabetes Mellitus in a High Prevalent Diabetic Population

Table 3

Comparison between FBG values and the carbohydrate metabolic status along with the sensitivity, specificity, positive predictor, and negative predictor values at each FBG range.

FBG	NGT	GDM	Sensitivity	Specificity	Positive predictor	Negative predictor
Prevalence
Chi square
>4.5	96	80	60.2	63.5	45.5	24.1
44.4%
>5.0							0	64	48.1	100.0	100.0	20.8
16.2%