Table 2.
Summary of air quality and weather conditions during pregnancy of all participants.
| Pollutants | Mean | Min | Max | Percentiles | ||
|---|---|---|---|---|---|---|
| 5th | 50th | 95th | ||||
| Trimester 1 | ||||||
| PM2.5 (μg/m3) | 36.3 | 8.8 | 93.4 | 18.9 | 34.8 | 58.1 |
| O3 (μg/m3) | 54.1 | 16.7 | 96.8 | 32.9 | 54.0 | 75.8 |
| NO2 (μg/m3) | 34.3 | 5.0 | 88.7 | 13.5 | 33.5 | 58.8 |
| SO2 (μg/m3) | 14.2 | 4.3 | 58.4 | 6.7 | 12.4 | 27.4 |
| Relative humidity (%) | 78.5 | 53.9 | 90.5 | 69.1 | 79.2 | 85.5 |
| Daily mean temperature (°C) | 22.5 | 9.4 | 29.9 | 14.6 | 22.7 | 29.1 |
| Trimester 2 | ||||||
| PM2.5 (μg/m3) | 33.9 | 8.3 | 90.1 | 18.0 | 32.7 | 53.6 |
| O3 (μg/m3) | 54.4 | 16.9 | 97.6 | 34.6 | 54.5 | 74.0 |
| NO2 (μg/m3) | 33.2 | 8.5 | 83.6 | 13.2 | 32.8 | 57.3 |
| SO2 (μg/m3) | 13.1 | 4.5 | 54.6 | 6.8 | 11.8 | 23.9 |
| Relative humidity (%) | 79.1 | 57.0 | 90.3 | 70.6 | 79.6 | 85.6 |
| Daily mean temperature (°C) | 23.4 | 11.3 | 29.9 | 15.7 | 24.5 | 29.0 |
| Trimester 3 | ||||||
| PM2.5 (μg/m3) | 33.8 | 8.7 | 93.7 | 17.5 | 32.8 | 53.7 |
| O3 (μg/m3) | 55.2 | 14.2 | 105.7 | 34.5 | 55.1 | 75.1 |
| NO2 (μg/m3) | 33.3 | 7.0 | 96.8 | 13.2 | 32.8 | 57.1 |
| SO2 (μg/m3) | 12.6 | 4.0 | 65.1 | 6.8 | 11.6 | 22.6 |
| Relative humidity (%) | 78.8 | 43.9 | 95.3 | 70.0 | 79.2 | 85.7 |
| Daily mean temperature (°C) | 23.5 | 10.2 | 30.7 | 15.3 | 24.7 | 29.2 |