Figure.

Receiver operating characteristics of two different screening procedures for gestational diabetes (fasting plasma glucose concentration and 50 g glucose challenge test independent of prior food intake). The area under the curve is 0.897 for fasting plasma glucose concentration and 0.815 for the glucose challenge test. The true positive rates (sensitivity) versus the false positive rates (1-specificity) are plotted for the cut off values (each data point is 0.2 mmol/l apart)