Changes in birth weight (in g) for a 10 μg/m3 change in exposure to air pollutants (except CO for which a 1 ppm change was used) at each trimester of pregnancy. Results from regression models adjusted for covariates presented in table 2 (except parity)
| Trimester | Pollutant | Change in birth weight (95% CI) | |
|---|---|---|---|
| First | PM10 | −13.7 | (−27.0 to −0.4) |
| SO2 | −24.2 | (−55.5 to 7.1) | |
| NO2 | −7.0 | (−14.3 to 0.3) | |
| CO | −23.1 | (−41.3 to −4.9) | |
| O3 | −1.6 | (−12.8 to 9.5) | |
| Second | PM10 | −4.4 | (−18.9 to 10.1) |
| SO2 | 33.7 | (1.6 to 65.8) | |
| NO2 | 0.3 | (−8.6 to 9.2) | |
| CO | 3.2 | (−18.2 to 24.5) | |
| O3 | −0.1 | (−11.9 to 11.7) | |
| Third | PM10 | 14.6 | (0.0 to 29.2) |
| SO2 | 9.7 | (−25.6 to 44.9) | |
| NO2 | 3.6 | (−6.6 to 13.7) | |
| CO | 1.9 | (−18.2 to 22.0) | |
| O3 | −3.0 | (−15.4 to 9.4) | |