Summary statistics for pollutants and meteorological data October 1995–October 1997
| All months | Autumn and winter | Spring and summer | |||
| Mean (SD) [median] IQR | Mean | Range | Mean | Range | |
| NO2 (1 h max, ppb) | 51.4 (15.8), [48], 42 to 56 | 51.3 | 26 to 163 | 51.5 | 24 to 131 |
| O3 (8 h ave, ppb) | 15.5 (10.7), [14.1], 7.5 to 21.6 | 9.8 | 1 to 32 | 21.6 | 3 to 74 |
| SO2 (24 h ave, ppb) | 7.5 (6.3), [5.3], 3.2 to 9.3 | 9.8 | 1 to 42 | 5.5 | 1 to 74 |
| PM10 (24 h ave, μg/m3) | 37.7 (17.4), [32.5], 25.9 to 44.9 | 39.1 | 10 to 134 | 35.6 | 13 to 86 |
| Black smoke* (24 h ave, μg/m3) | 10.1 (9.7), [7], 4 to 13 | 12.9 | 1 to 81 | 7.0 | 1 to 34 |
| Outdoor temperature (average of min and max, oC) | 11.4 (6.0), [11], −1.5 to 27 | 8.1 | −1.5 to 21 | 15.3 | 4.5 to 27 |
↵* Summary statistics presented for the Stepney black smoke monitor used for 63% of patients.
PM, particulate matter.