Utility of oral glucose tolerance test in predicting type 2 diabetes following gestational diabetes: Towards personalized care

Table 5 Sensitivity and specificity of fasting blood glucose and 2-h blood glucose in predicting type 2 diabetes following gestational diabetes mellitus in Emirati women¹

IADPSG diagnostic criteria for GDM (2007)	ADA diagnostic criteria for T2D (2016)
	FBG		2hrBG
	T2D (n)	Normal (n)	T2D (n)	Normal (n)
GDM	65	202	1	33
Normal	14	248	4	248
Point estimates and 95%CIs
True prevalence	0.149 (0.12, 0.183)		0.017 (0.006, 0.04)
Sensitivity	0.823 (0.721, 0.9)		0.200 (0.005 0.716)
Specificity	0.551 (0.504, 0.598)		0.883 (0.839, 0.918)
Positive predictive value	0.243 (0.193, 0.299)		0.029 (0.001, 0.153)
Negative predictive value	0.947 (0.912, 0.97)		0.984 (0.96, 0.996)
Positive likelihood ratio	1.833 (1.586, 2.118)		1.703 (0.287, 10.12)
Negative likelihood ratio	0.322 (0.198, 0.521)		0.906 (0.584, 1.408)
Odds ratio	5.7 (3.108, 10.455)		1.879 (0.204, 17.32)

¹The R 4.02 statistical software was used to plot the receiver operating characteristic curve.

GDM: Gestational diabetes mellitus; T2D: Type 2 diabetes; FBG: Fasting blood glucose; 2hrBG: 2-h blood glucose.