Model for 10% decrements in day time peak flow rate
| p Value | OR for change of one unit of measurement | 95% CIs | |
| Mean temperature (°C) | 0.18 | 0.97 | 0.928 to 1.014 |
| Mean wind speed (m/s) | 0.10 | 1.097 | 0.981 to 1.225 |
| Mean humidity (%) | 0.44 | 1.006 | 0.991 to 1.020 |
| Log PM10 | 0.05 | 1.284 | 0.996 to 1.656 |