Table 3.
Exposure characteristics.
| Pollution indicator | Meana ± SD | 25th percentile | 75th percentile | ||||
|---|---|---|---|---|---|---|---|
| PM10 (µg/m³) | |||||||
| Week (mean lag 0–7) | 24.9 ± 11.1 | 17.5 | 30.5 | ||||
| Last month | 25.6 ± 8.6 | 19.3 | 29.5 | ||||
| Trimester 1 | 21.5 ± 5.1 | 18.1 | 23.7 | ||||
| Trimester 2 | 22.3 ± 4.3 | 19.3 | 25.3 | ||||
| Trimester 3 | 24.4 ± 5.7 | 20.2 | 28.1 | ||||
| Whole pregnancy | 22.7 ± 3.7 | 20.1 | 25.1 | ||||
| Traffic-related pollution | |||||||
| Residential distance to major road (m) | 207 | 85 | 676 | ||||
| aArithmetic mean except for the residential distance to major road, for which the geometric mean is given. | |||||||