Table 4 Associations between air pollutants and preterm births, Sydney, 1998–2000
From: Impact of ambient air pollution on gestational age is modified by season in Sydney, Australia
Pollutant | Exposure period | |||||||
|---|---|---|---|---|---|---|---|---|
One month preceding birth | Three months preceding birth | First month of gestation | First trimester | |||||
Sydney OR‡ 95% CI | 5 km OR 95% CI | Sydney OR 95% CI | 5 km OR 95% CI | Sydney OR 95% CI | 5 km OR 95% CI | Sydney OR 95% CI | 5 km OR 95% CI | |
PM10 24 hour average | 0.991 0.979–1.003 | 1.008 0.993–1.022 | 0.989 0.975–1.004 | 1.012 0.995–1.030 | 0.983** 0.973–0.993 | 0.957 0.914–1.002 | 0.987 0.973–1.001 | 1.009 0.978–1.041 |
PM2.5 24 hour average | 0.984 0.962–1.008 | 1.042 0.997–1.089 | 0.981 0.952–1.011 | 1.111** 1.037–1.189 | 0.981 0.962–1.000 | 1.032 0.897–1.188 | 0.978 0.950–1.007 | 0.991 0.929–1.057 |
O3 1-hour maximum | 0.998 0.987–1.006 | 0.984 0.906–1.069 | 0.998 0.989–1.007 | 1.011 0.910–1.124 | 1.004 0.995–1.012 | 1.604** 1.268–2.030 | 1.014** 1.005–1.022 | 0.807* 0.668–0.976 |
NO21 hour maximum | 1.000 0.990–1.011 | 0.996 0.881–1.126 | 1.006 0.993–1.019 | 1.046 0.913–1.205 | 0.967** 0.958–0.975 | 0.589* 0.360–0.963 | 0.970** 0.959–0.980 | 1.052 0.741–1.493 |
CO 8 hour maximum | 0.962 0.889–1.042 | 1.000 0.864–1.158 | 0.997 0.907–1.096 | 1.111 0.942–1.310 | 0.896** 0.842–0.953 | 1.030 0.685–1.548 | 0.774** 0.715–0.838 | 1.247 0.811–1.917 |
SO2 1 hour maximum | 0.993 0.948–1.040 | 1.557* 1.017–2.382 | 0.977 0.898–1.063 | 2.330** 1.344–4.040 | 0.856** 0.819–0.894 | 1.378 0.876–2.167 | 0.834** 0.777–0.895 | 2.312** 1.290–4.145 |