Table 2. Analysis of the correlation between serum RBP4 and FPG, OGTT, HOMA-IR and FINS in five groups of women.

Groups	FPG	OGTT1h	OGTT2h	FINS	HOMA-IR
GDM group at the middle stage
r	−0.05	0.06	0.07	0.91	0.75
P	0.45	0.37	0.36	<0.01	<0.01
GDM group at the late stage
r	−0.25			0.79	0.48
P	0.73			<0.01	<0.01
Control group at the middle stage
r	0.07	−0.29	<0.01	0.91	0.85
P	0.54	0.02	0.99	<0.01	<0.01
Control group at the late stage
r	−0.04			0.95	0.82
P	0.76			<0.01	<0.01
GDM postpartum group
r	0.16	0.06	−0.04	0.83	0.76
P	0.1	0.56	0.68	<0.01	<0.01

FPG, fasting plasma glucose; FINS, fasting insulin; RBP4, retinol-binding protein 4; GDM, gestational diabetes mellitus; HOMA-IR, insulin resistance index.