Table 1.
Summary statistics: ambient air pollution concentrations by birth-year.
| Ambient air pollution exposure | Birth year (Infancy WFS exposure level) |
P-value± | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2008 (High WFS) |
2009 (Low WFS) |
||||||||||
| Mean | Median | SD | Min | Max | Mean | Median | SD | Min | Max | ||
| PM2.5: from birth to 90 days (μg/m3) | 14.2 | 14.1 | 1.28 | 11.6 | 15.7 | 9.07 | 9.12 | 0.44 | 8.51 | 9.70 | <.0001∗ |
| PM2.5: from 90 days to PFT (μg/m3) | 9.48 | 9.44 | 0.17 | 9.27 | 9.88 | 10.0 | 10.0 | 0.02 | 9.97 | 10.1 | <.0001∗ |
| 8-hour peak Ozone: from birth to 90 days (ppb) | 53.4 | 53.4 | 0.35 | 52.9 | 54.2 | 48.3 | 48.4 | 0.66 | 47.6 | 49.2 | <.0001∗ |
| 8-hour peak Ozone: from 90 days to PFT (ppb) | 40.3 | 40.2 | 0.29 | 39.8 | 40.9 | 40.5 | 40.5 | 0.17 | 40.1 | 40.7 | 0.01∗ |
SD: standard deviation; Min: minimum; Max: maximum.
±
Wilcoxon signed-rank test; differences between birth-year 2008 and 2009.
∗
Indicates results robust to FDR adjustment for multiple comparisons, at p < .05.