Risk factor

OR

95% CI

Age at marriage (≤18 years)

2.1

1.2 - 3.7

Height (≤145 cm)

3.3

1.9 - 5.7

Weight before/at early pregnancy (≤45 kg)

2.4

1.3 - 4.3

Weight at delivery (≤55 kg)

2.7

1.5 - 5.0

BMI (<18 and 18 - 22 kg/m2)*

5.1

1.6 - 21.3**

Family history of LBW babies

2.7

1.3 - 5.7

Low educational status

1.7

1.2 - 2.5

Unskilled occupation

1.6

1.1 - 2.4