Table 2.
Unadjusted fetal growth outcomes among women who smoked at all during pregnancy and non-smokers as assessed by self-report or cotinine
| Fetal growth | Smoked during pregnancy (n = 270)a | Never smoked during pregnancy (n = 565)a |
|---|---|---|
| Mean (SD) | Mean (SD) | |
| Birthweight (g) | 3303 (498) | 3429 (531) |
| Crown-heel length (cm) | 50.0 (2.5) | 50.6 (2.5) |
| Head circumference (cm) | 34.1 (1.6) | 34.4 (1.5) |
| Ponderal indexb | 2.6 (0.3) | 2.7 (0.3) |
| Brain: body ratioc | 9.8 (1.2) | 9.7 (1.2) |
a
The sample sizes given are for birthweight; sample sizes are slightly different for other fetal growth outcomes as not all measures were recorded for all infants.
b
100 × [birthweight (g)/length (cm)3].
c
100 × [0.037 × head circumference (cm)2.57]/birthweight (g).