The table shows the odds ratios (OR) with 95% confidence intervals (CI) of overweight at age 7 years in children exposed to smoking both during pregnancy and postnatally compared with children exposed only during pregnancy, while adjusting for quantity of prenatal smoking.

Odds ratios were additionally adjusted for postnatal smoking, child sex, parity, birth weight, gestational age at birth, and socio-occupational status (not shown). Only mother-child pairs, with information on numbers of cigarettes smoked daily during pregnancy, as well as with information on either smoking during pregnancy only, or smoking both in pregnancy and postnatal, are included in these analyses (n = 6,804). *Obese children are included in the overweight group.
Odds ratios of included covariates i.e. maternal age at birth, maternal gestational weight gain, maternal pre-pregnancy BMI, and paternal smoking are shown as well.
The table shows the odds ratios (OR) with 95% confidence intervals (CI) of overweight at age 7 years in children exposed to smoking both during pregnancy and postnatally compared with children exposed only during pregnancy, while adjusting for quantity of prenatal smoking.