Table 1.
Summary statistics for daily ambulance attendances, meteorological and air pollution variables in Brisbane, 2000–2007
| Variable | No. of days | Mean | Minimum | 25th Percentile | Median | 75th Percentile | Maximum |
| Total (783 935 counts) | 2922 | 268.3 | 104 | 210 | 283.5 | 325 | 432 |
| Cardiovascular (120 041 counts) | 2922 | 41.1 | 11 | 34 | 41 | 48 | 77 |
| Respiratory (68 535 counts) | 2922 | 23.5 | 3 | 18 | 23 | 29 | 62 |
| Other non-traumatic (55 822 counts) | 2922 | 19.1 | 1 | 12 | 18 | 25 | 60 |
| Mean temperature (°C) | 2915 | 20.5 | 9 | 17.1 | 21 | 23.7 | 34.2 |
| Relative humidity (%) | 2909 | 71.4 | 23.8 | 66.3 | 72.6 | 78.5 | 96.3 |
| PM10 (μg/m3) | 2922 | 19.7 | 4.7 | 14.9 | 18.4 | 22.6 | 166.8 |
| Ozone (ppm) | 2922 | 0.0144 | 0.0014 | 0.0107 | 0.0137 | 0.0174 | 0.0353 |
| Sulphur dioxide (ppm) | 2922 | 0.0015 | 0 | 0.0009 | 0.0013 | 0.0019 | 0.0085 |
| Nitrogen dioxide (ppm) | 2922 | 0.0116 | 0.0014 | 0.0077 | 0.0109 | 0.0151 | 0.0333 |