Table 1: Statistics of the daily values of the used parameters. Edmonton, Canada, 1992-2002.
| Parameters | ED visit | CO | NO2 | Temp | RHum |
| Minimum | 0 | 0.04 | 3.9 | -34.1 | 25.1 |
| Q1 | 1 | 0.47 | 14.7 | -4.0 | 57.1 |
| Median | 2 | 0.63 | 19.7 | 5.4 | 66.2 |
| Mean | 1.9 | 0.74 | 21.6 | 3.9 | 66.0 |
| Q3 | 3 | 0.87 | 27.5 | 14.0 | 75.6 |
| Maximum | 9 | 4.82 | 67.4 | 26.5 | 98.5 |
Notes: ED: Emergency Department, Temp: ambient temperature (in ℃), Rhum: Relative Humidity (in %), Q1- 25th percentile, Q3-75th percentile, CO in ppm, NO2 in ppb.