Table 2

Mean difference (95% confidence interval) of birth weight (gm) (N = 6528) and placenta weight (gm) (N = 6281) by IOM, pre-pregnancy BMI categories and gestational weight gain per 0.1 kg/week, adjusting for potential confounding factors

Mean difference of birth weight

Mean difference of placenta weight

Age adjusted

Fully adjusted¥

Age adjusted

Fully adjusted¥


IOM§

Inadequate

-190.63

(-221.05,-160.20)

-152.82

(-180.34,-125.30)

-37.16

(-45.23,-29.09)

-37.80

(-45.87,-29.72)

Adequate (ref.)

0

0

0

0

Excess

206.45

(178.82,234.08)

211.34

(186.29,236.38)

41.16

(33.83,48.49)

42.76

(35.39,50.14)

Pre-pregnancy BMI §

Underweight

-207.26

(-249.21,-165.31)

-171.27

(-209.15,-133.38)

-43.23

(-54.18.-32.28)

-43.06

(-54.05,-32.08)

Normal (ref.)

0

0

0

00

Overweight

123.17

(84.47,161.87)

125.98

(90.97,161.00)

35.54

(25.47,45.61)

36.56

(26.44,46.67)

Obese

148.11

(85.32,21.091)

178.00

(121.09,234.91)

58.49

(41.97,75.00)

59.80

(43.20,76.41)

Gestational weight gain§ (0.1 kg/week)

81.52

(72.97,90.07)

88.67

(81.09,96.29)

16.77

(14.52,19.01)

17.32

(15.05,19.59)


¥Fully adjusted model adjusted for maternal age, education, racial origin, cigarette smoking and alcohol consumption, gestation and high risk pregnancy

§IOM, pre-pregnancy BMI and gestational weight gain are considered three different exposures and analyses are performed separately for each of them.

Mamun et al. BMC Pregnancy and Childbirth 2011 11:62   doi:10.1186/1471-2393-11-62

Open Data