From: Impact of ambient air pollution on gestational age is modified by season in Sydney, Australia
Autumn n = 31 008 | Winter n = 31 097 | Spring n = 31 563 | Summer n = 30 446 | |||||
---|---|---|---|---|---|---|---|---|
OR‡ | 95% CI | OR | 95% CI | OR | 95% CI | OR | 95% CI | |
PM10 24-hour average | 1.462** | 1.267–1.688 | 1.343** | 1.190–1.516 | 1.119 | 0.973–1.288 | 0.913** | 0.889–0.937 |
PM2.5 24-hour average | 1.080 | 0.912–1.281 | 1.426** | 1.264–1.608 | 1.156 | 0.972–1.375 | 0.879** | 0.839–0.922 |
O3 1-hour maximum | 1.012 | 0.987–1.037 | 0.989 | 0.972–1.007 | 1.093** | 1.019–1.071 | 1.031** | 1.023–1.040 |
NO21 hour maximum | 1.045 | 0.963–1.134 | 1.153** | 1.066–1.247 | 1.002 | 0.933–1.077 | 0.957** | 0.938–0.976 |
CO 8 hour maximum | 0.114** | 0.086–0.152 | 0.134** | 0.062–0.281 | 0.584 | 0.283–1.462 | 0.633** | 0.535–0.750 |
SO2 1-hour maximum | 6.489** | 4.365–9.648 | 1.323** | 1.027–1.704 | 1.287 | 0.955–1.734 | 0.826** | 0.759–0.898 |