Table 4. Comparison of the beta-cell function and insulin sensitivity between women with a normal OGTT and women with glucose intolerance postpartum.

	Normal N = 76 (56.3%)	Glucose intolerance N = 59 (43.7%)	P value	Adjusted p value
ISSI-2 index (median)	1.9(1.7–2.4)	1.6(1.2–2.1)	<0.0001	0.002
Insulinogenic index/HOMA-IR index (median)	0.010(0.008–0.014)	0.009(0.005–0.015)	0.119	0.249
Matsuda index (median)	0.778(0.532–1.067)	0.656(0.386–1.224)	0.279	0.709
1/HOMA-IR index(median)	0.004(0.003–0.007)	0.004(0.002–0.009)	0.699	0.384

ISSI-2: insulin secretion sensitivity index postpartum; Insulinogenic index/HOMA-IR is a measure for beta-cell function postpartum; Matsuda: insulin sensitivity index of Matsuda postpartum; 1/HOMA-IR: the reciprocal of the homeostasis model assessment of insulin resistance post-partum; Statistical analyzes: for non-parametric variables the Mann–Whitney’s U-test were used. The p-values for the measurements post-partum are adjusted for age, BMI, ethnicity and breastfeeding. P values in bold are statistical significant.