| SGA - weight (n: 785) | SGA - length (n:784) |
---|
NO2 exposure period | OR | (95% CI) | Linearity (df)a
| OR | (95% CI) | Linearity (df)a
|
---|
Unadjusted | | | | | | |
---|
First trimester | 1.013 | (0.992; 1.035) | L | 1.001 | (0.968; 1.035) | L |
Second trimester | 1.013 | (0.992; 1.034) | L | 1.006 | (0.972; 1.041) | L |
Third trimester | 1.004 | (0.983; 1.026) | L | 1.013 | (0.979; 1.049) | L |
Whole pregnancy | 1.014 | (0.988; 1.040) | L | 1.010 | (0.970; 1.052) | L |
Adjusted
b
| | | | | | |
First trimester | 1.182 | (0.894; 1.563) | L | 1.137 | (0.741; 1.744) | L |
Second trimester | 1.369 | (1.013; 1.849) | L | 1.416 | (0.890; 2.254) | L |
Third trimester | 1.186 | (0.906; 1.552) | L | 1.103 | (0.750; 1.623) | L |
Whole pregnancy | 1.281 | (0.942; 1.743) | L | 1.230 | (0.778; 1.945) | L |
- *Estimates are expressed as the change in odds for SGA (birth weight) and SGA (birth length) for a 10 μg/m3 increase in the mean NO2 levels at each woman's residence during the corresponding period. Unadjusted and adjusted models.
-
a Shape of the relationship after contrast between model with NO2 in non-linear vs. linear form; L: linear; NL: non-linear (and degrees of freedom of the selected model).
-
b Adjusted for:
- -SGA in weight: maternal age, maternal pre-pregnancy weight, paternal height, gestational weight gain, parity, maternal education, country of origin, smoking during pregnancy, and season of last menstrual period.
- -SGA in length: maternal age, maternal pre-pregnancy weight, maternal education, parity, smoking during pregnancy, gestational weight gain, country of origin, alcohol consumption during pregnancy, and season of last menstrual period.