Table 4.
Time window-specific gestational age change (d) per 5 μg/m3 increase in PM2.5 levels (restricting to population in areas with annual exposures ≤12 μg/m3)
| Percentile | 2.5th | 10th | 25th | 50th | 75th | 90th | 97.5th |
|---|---|---|---|---|---|---|---|
| Third trimester | −2.4 (−3.1, −1.6) | −1.4 (−1.7, −1.1) | −0.70 (−0.80, −0.60) | 0.00 (−0.10, 0.10) | 0.00 (−0.10, 0.10) | −0.62 (−0.91, −0.33) | 0.00 (−0.39, 0.39) |
| Last month | −6.2 (−6.9, −5.5) | −3.4 (−3.7, −3.1) | −2.1 (−2.3, −1.9) | −1.3 (−1.4, −1.2) | −0.54 (−0.64, −0.44) | −0.48 (−0.58, −0.38) | 0.00 (−0.10, 0.10) |
Adjusted for individual covariates, contextual variables, season of conception, and calendar year described in Methods section. Point estimates (95% confidence interval) for each percentile are reported here for the third trimester and last month preceding delivery.