Table 4.
The effects of the combinations of exposure to maternal smoking during pregnancy and pre-pregnancy overweight on term birth weight and the risk of being SGA and LGA
| Categories | Birth weight (g) | SGA | LGA | ||||
|---|---|---|---|---|---|---|---|
| Crude Diff (g) (95% CI) |
Adjusted Diff a (g) (95% CI) |
Crude OR (95% CI) |
Adjusted OR b (95% CI) |
Crude OR (95% CI) |
Adjusted OR c (95% CI) |
||
| SM - | OV- | 0 (Ref) | 0 (Ref) | 1.0 (Ref) | 1.0 (Ref) | 1.0 (Ref) | 1.0 (Ref) |
| SM+ | OV- | −177.1 (−226.8, −127.4) | −163.8 (− 214.4, −113.1) | 2.06 (1.49, 2.84) | 1.94(1.39, 2.69) | 0.73 (0.49, 1.07) | 0.75 (0.51, 1.09) |
| SM - | OV+ | 110.4 (64.6, 156.2) | 120.4 (74.1, 166.8) | 0.57 (0.36, 0.90) | 0.55 (0.34, 0.86) | 1.79 (1.37, 2.33) | 1.81 (1.38, 2.37) |
| SM+ | OV+ | −46.6(− 131.2, 38.1) | −26.6(−113.0, 59.8) | 1.21 (0.64, 2.30) | 1.06 (0.56, 2.04) | 1.05 (0.59, 1.87) | 1.09 (0.61, 1.96) |
Abbreviations: Diff mean Difference, SGA Small for gestational age, LGA Large for gestational age, OR Odds ratio, CI Confidence interval, SM maternal smoking during pregnancy, OV maternal pre-pregnancy overweight
aMultivariable linear regression adjusted for maternal age and education
bMultivariable logistic regression adjusted for maternal age and education
cMultivariable logistic regression adjusted for maternal age and education