Matrix of Pearson correlation coefficients of pollutant concentrations (averaged across all air monitoring stations) in Sydney, April 1997–December 2000, and birth outcomes for term births in Sydney, 1998–2000
| Pollutant | Birth weight | CO | NO2 | O3 | PM10 | PM2.5 | Temp |
|---|---|---|---|---|---|---|---|
| Temp, temperature; ppb, parts per billion (10−9); ppm, parts per million (10−6); CO, carbon monoxide, 8 hour average in ppm; O3, ozone, 1 hour max in ppb; PM10, particulate matter less than 10 microns, 24 hour average in μg/m3; PM2.5, particulate matter less than 2.5 microns, 24 hour average in μg/m3; NO2, nitrogen dioxide, 24 hour average in ppb. | |||||||
| Birth weight | 1.00 | ||||||
| CO | 0.00 | 1.00 | |||||
| NO2 | 0.01 | 0.57 | 1.00 | ||||
| O3 | 0.01 | −0.20 | 0.29 | 1.00 | |||
| PM10 | 0.01 | 0.26 | 0.47 | 0.52 | 1.00 | ||
| PM2.5 | 0.01 | 0.53 | 0.66 | 0.36 | 0.81 | 1.00 | |
| Temp | 0.00 | −0.42 | −0.16 | 0.60 | 0.38 | 0.05 | 1.00 |