Table 4 Association between pre-pregnancy weight, weight gain during pregnancy and preterm birth – adjusted analysis

< 7.0

1.70***

1.74***

0.79

0.61***

0.51***

0.68*

0.53***

0.50***

0.84

(1.38, 2.09)

(1.36, 2.22)

(0.40, 1.57)

(0.52, 0.71)

(0.42, 0.62)

(0.47, 0.99)

(043, 0.65)

(0.39, 0.64)

(0.56, 1.27)

7.0-9.4

1.19

1.18

1.23

0.72*

0.58**

0.91

0.66*

0.28**

0.77

(0.92, 1.54)

(0.88, 1.60)

(0.68, 2.22)

(0.56, 0.92)

(0.42, 0.80)

(0.52, 1.59)

(0.44, 0.99)

(0.14, 0.58)

(0.28, 2.14)

9.5-12.7

1.43*

1.57**

1.19

0.85

0.85

1.08

0.75

0.45*

2.66*

(1.15, 1.78)

(1.22, 2.02)

(0.67, 2.10)

(0.67, 1.08)

(0.63, 1.13)

(0.62, 1.89)

(0.48, 1.18)

(0.23, 0.89)

(1.35, 5.22)

> 12.7

0.85

1.13

1.06

1.04

0.90

1.05

0.98

1.24

1.24

(0.64, 1.14)

(0.82, 1.55)

(0.57, 1.97)

(0.83, 1.30)

(0.67, 1.21)

(0.58, 1.87)

(0.69, 1.38)

(0.84, 1.84)

(0.53, 2.91)