Table 2.
Descriptive statistics of prenatal NO2 exposure (μg/m3).
| NO2 exposure (μg/m3) | Mean ± SD | P5 | P25 | P50 | P75 | P95 | ra |
|---|---|---|---|---|---|---|---|
| INMA (n = 376) | |||||||
| Trimester 1 | 26.1 ± 12.9 | 5.6 | 16.4 | 23.1 | 33.7 | 74.2 | 0.91* |
| Trimester 2 | 25.6 ± 11.6 | 5.7 | 16.4 | 24.8 | 31.2 | 74.7 | 0.93* |
| Trimester 3 | 25.7 ± 12.1 | 5.7 | 16.9 | 23.8 | 32.3 | 74.4 | 0.92* |
| Entire pregnancy | 25.5 ± 11.4 | 5.7 | 17.2 | 24.0 | 32.3 | 66.7 | — |
| ENVIRONAGE (n = 550) | |||||||
| Trimester 1 | 20.7 ± 6.1 | 7.3 | 16.3 | 20.2 | 24.9 | 39.2 | 0.61* |
| Trimester 2 | 20.8 ± 6.0 | 8.6 | 16.2 | 20.5 | 25.1 | 46.0 | 0.86* |
| Trimester 3 | 21.4 ± 6.1 | 9.2 | 16.9 | 20.8 | 25.6 | 40.3 | 0.66* |
| Entire pregnancy | 21.1 ± 4.2 | 12.6 | 18.2 | 20.8 | 23.7 | 40.3 | — |
| INMA + ENVIRONAGE (n = 926) | |||||||
| Trimester 1 | 22.7 ± 9.8 | 5.6 | 16.1 | 21.2 | 26.8 | 74.2 | 0.86* |
| Trimester 2 | 22.6 ± 9.1 | 5.7 | 15.9 | 21.3 | 27.3 | 74.7 | 0.91* |
| Trimester 3 | 23.0 ± 9.3 | 5.7 | 16.7 | 21.5 | 27.3 | 74.4 | 0.88* |
| Entire pregnancy | 22.7 ± 8.3 | 5.7 | 17.6 | 21.2 | 25.6 | 66.7 | — |
| P, percentile. Continuous covariates expressed by mean ± SD.aPearson correlation between the pregnancy average and trimester-specific exposures. *p < 0.001. | |||||||