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Associations between air pollutants and preterm births, Sydney, 1998–2000 |
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| Pollutant |
Exposure period |
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|
|
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| One month preceding birth |
Three months preceding birth |
First month of gestation |
First trimester |
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|
|
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| 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 |
|
|
|
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| 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 |
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‡OR estimates adjusted for: maternal age, maternal smoking during pregnancy, indigenous status, SES, gestational age at first antenatal visit, season of conception and parity. OR is for a one unit increase in air pollutant concentration; *p < 0.05; **p < 0.01 | ||||||||
Jalaludin et al. Environmental Health 2007 6:16 doi:10.1186/1476-069X-6-16 |
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