Table 1

Odds (95% confidence interval) of being caesarean and other methods of pregnancy delivery, preterm births and high risk pregnancy by IOM, pre-pregnancy BMI categories and gestational weight gain per 0

Method of deliverya

Preterm birthb

Pregnancy complicationsc

Caesarean

Other


Age adjusted

Fully Adjusted§

Age adjusted

Fully adjusted§

Age adjusted

Fully adjusted¥

Age adjusted

Fully adjusted¢


IOM

Inadequate

0.89

(0.73,1.09)

0.79

(0.64,0.97)

0.79

(0.64,0.98)

0.78

(0.63,0.98)

2.27

(1.71,3.00)

2.41

(1.81,3.20)

0.58

(0.44,0.77)

0.58

(0.44,0.77)

Adequate

1.00

1.00

1.00

1.00

1.00

1.00

1.00

1.00

Excess

1.29

(1.09,1.54)

1.34

(1.12,1.60)

1.25

(1.04,1.49)

1.24

(1.03,1.50)

0.63

(0.44,0.89)

0.53

(0.37,0.76)

2.10

(1.74,2.54)

2.15

(1.78,2.61)

Pre-pregnancy BMI

Underweight

0.95

(0.72,1.26)

0.89

(0.67,1.19)

1.21

(0.94,1.55)

1.28

(0.99,1.65)

1.68

(1.18,2.38)

1.69

(1.19,2.41)

0.64

(0.44,0.93)

0.67

(0.46,0.97)

Normal

1.00

1.00

1.00

1.00

1.00

1.00

1.00

1.00

Overweight

1.40

(1.13,1.75)

1.40

(1.12,1.75)

0.82

(0.63,1.08)

0.79

(0.60,1.04)

0.82

(0.53,1.26)

0.72

(0.46,1.12)

2.15

(1.72,2.69)

2.16

(1.73,2.70)

Obese

2.19

(1.61,2.98)

2.08

(1.51,2.86)

0.77

(0.48,1.25)

0.71

(0.43,1.15)

1.31

(0.74,2.34)

1.08

(0.60,1.95)

3.28

(2.40,4.48)

3.33

(2.43,4.56)

Gestational weight gain (0.1 kg/week)

1.09

(1.03,1.15)

1.10

(1.04,1.16)

1.14

(1.09,1.20)

1.13

(1.07,1.20)

0.84

(0.76,0.92)

0.78

(0.71,0.86)

1.31

(1.24,1.38)

1.32

(1.25,1.40)


a method of delivery was three categories: normal, caesarean and other delivery methods. Multinomial logistic regression was used, considering normal delivery as the reference category

b Preterm birth: binary outcome as normal vs. premature. Logistic regression was used, considering premature birth as an outcome

c High risk: binary outcome as normal vs. high risk. Logistic regression was used, considering high risk as an outcome

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

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

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

Open Data