Leaner Women with Impaired Insulin Secretion Accounts for about 40 of Gestational Diabetes Mellitus in Japan

Table 1

Maternal characteristics of the LIR and HIR groups.

Number	HIR	LIR	p
	45	25
maternal age (yrs)	36.0±4.6	36.8±4.6	0.76
primipara (%)	24 (53)	17 (68)	0.23
random blood glucose at the first visit (mg/dl)	91.5±12.6	95.0±20.7	0.46
gestational age at undergoing 75gOGTT (wks)	24.6±6.2	21.7±6.7	0.08
Indication for 75gOGTT
random blood glucose method, 100mg/dL or more at first visit	12	3	0.48
random blood glucose method, 100mg/dL or more at mid-pregnancy	16	8
repeated positive results in the urine glucose test strip	10	11
history of GDM	1	1
obese	1	0
others	5	2

LIR group: women with low insulin resistance, HIR group: women with high insulin resistance, 75gOGTT: 75g glucose tolerance test, GDM: gestational diabetes mellitus