Table 5 Interaction between season and individual pollutants.
| Pollutant | RR | 95% CI | p Value | t Score |
|---|---|---|---|---|
| NO2 (lag 0–3) | 1.0164 | 1.0086 to 1.0243 | <0.0001* | 4.150476 |
| O3 (lag 0–5) | 1.0195 | 1.0081 to 1.0309 | 0.0007* | 3.379242 |
| SO2 (lag 0) | 1.0205 | 1.0078 to 1.0334 | 0.0015* | 3.178459 |
| PM2.5 (lag 0–5) | 0.9983 | 0.9891 to 1.0076 | 0.5200 | 0.643313 |
| PM10 (lag 0–3) | 1.0012 | 0.9951 to 1.0073 | 0.7059 | 0.37738 |
RR, relative risk (the warm season was used as the reference). The cold season is defined as the period from December to March of each year.
*p<0.05.