Table 2.

Association of maternal body mass index(BMI) change with large for gestational age(LGA).

Variable	LAG(%)	Crude OR(95%CI)	P value	Model1a			Model2b			Model3c
				Adjusted OR(95%CI)	P value	Adjusted OR(95%CI)		P value	Adjusted OR(95%CI)		P value
BMI change, per unit	2111(20.1)	1.16(1.13 ~ 1.20)	< 0.001	1.18 (1.15 ~ 1.22)	< 0.001	1.19(1.15 ~ 1.22)		< 0.001	1.27 (1.23 ~ 1.31)		< 0.001
BMI change, per SD	2111(20.1)	1.329(1.23 ~ 1.36)	< 0.001	1.33 (1.26 ~ 1.4)	< 0.001	1.34(1.27 ~ 1.41)		< 0.001	1.51 (1.43 ~ 1.59)		< 0.001
BMI change, Quintile1	391 (14.9)	1(Ref)		1(Ref)		1(Ref)			1(Ref)
BMI change, Quintile2	501 (19.1)	1.35 (1.17 ~ 1.56)	< 0.001	1.35 (1.17 ~ 1.57)	< 0.001	1.38(1.19 ~ 1.60)		< 0.001	1.75 (1.5 ~ 2.04)		< 0.001
BMI change, Quintile3	571 (21.8)	1.59 (1.38 ~ 1.83)	< 0.001	1.6 (1.39 ~ 1.86)	< 0.001	1.65(1.43 ~ 1.91)		< 0.001	2.23 (1.91 ~ 2.60)		< 0.001
BMI change, Quintile4	648 (24.7)	1.87 (1.63 ~ 2.15)	< 0.001	1.96 (1.69 ~ 2.27)	< 0.001	2.01(1.73 ~ 2.32)		< 0.001	2.84 (2.43 ~ 3.32)		< 0.001
Trend.test	2111(20.1)	1.22 (1.17 ~ 1.28)	< 0.001	1.24 (1.19 ~ 1.30)	< 0.001	1.25(1.19 ~ 1.31)		< 0.001	1.39 (1.32 ~ 1.45)		< 0.001

^aModel 1 adjusted for maternal age, education level, employment, gravidity, parity, gestational age at delivery, and infant sex;

^bModel 2 adjusted for maternal age, education level, employment, gravidity, parity, gestational age at delivery,infant sex, and Oral glucose tolerance test level;

^cModel 3 adjusted for maternal age, education level, employment, gravidity, parity, gestational age at delivery,infant sex, Oral glucose tolerance test level, pre-pregnancy body mass index, maternal glycemic control and maternal triglyceride during the third trimester