Table 3 Model Results. Rate ratios (95% confidence intervals) from the models assessing interactions of the weather and pollution variables with period (outbreak vs non-outbreak) within the best single pollutant model.
| Â | Best single pollutant model variables | Period by variable interaction terms | ||||||
|---|---|---|---|---|---|---|---|---|
Model | Minimum air temperature (lag 3 days) | Maximum relative humidity (lag 3 days) | Mean solar radiation (no lag) | Minimum PM10 (lag 3 days) | Period | Interaction variable | Rate ratio in outbreak | Rate ratio in non-outbreak |
Best single pollutant model | 0.86 (0.77 – 0.96) | 1.09 (1.05 – 1.14) | 0.81 (0.59 – 1.11) | 1.05 (1.01 – 1.09) | NA | NA | NA | NA |
Period by mean solar radiation (no lag) | 0.86 (0.77 – 0.96) | 1.09 (1.04 – 1.14) | 0.97 (0.86–1.1) | 1.05 (1.01 – 1.09) | 0.80 (0.51 – 1.23) | 1.48 (1.04 – 2.1) | 1.44 (1.00 – 2.07) | 0.97 (0.86–1.10) |
Period by max ozone (lag 1 day) | 0.87 (0.78 – 1.97) | 1.09 (1.04 – 1.14) | 1.01 (0.89 – 1.14) | 1.05 (1.01 – 1.09) | 0.86 (0.58 – 1.27) | 1.13 (1.01 – 1.27) | 1.13 (1.01 – 1.26) | 1.00 (0.97–1.03) |
Period by Max ozone (lag 5 days) | 0.85 (0.76 – 0.95) | 1.09 (1.05 – 1.14) | 0.98 (0.87 – 1.11) | 1.05 (1.01 – 1.09) | 0.87 (0.60 – 1.28) | 1.12 (1.00 – 1.25) | 1.11 (0.99 – 1.24) | 0.99 (0.96–1.01) |
Period by max air temp (no lag) | 0.86 (0.77 – 0.96) | 1.09 (1.04 – 1.13) | 0.99 (0.88 – 1.11) | 1.05 (1.01 – 1.09) | 0.46 (0.21 – 1.01) | 1.32 (1.07 – 1.64) | 1.27 (1.03 – 1.57) | 0.96 (0.91–1.01) |
Period by min air temp (no lag) | 0.86 (0.77 – 0.96) | 1.09 (1.04 – 1.13) | 0.98 (0.87 – 1.11) | 1.05 (1.01 – 1.09) | 0.64 (0.34 – 1.20) | 1.41 (1.03 – 1.92) | 1.35 (0.99 – 1.85) | 0.96 (0.86–1.08) |
Period by min air temp (lag 4 days) | 0.83 (0.73 – 0.94) | 1.09 (1.05 – 1.14) | 0.98 (0.87 – 1.11) | 1.05 (1.01 – 1.09) | 0.42 (0.20 – 0.90) | 1.71 (1.18 – 2.46) | 1.77 (1.22 – 2.58) | 1.04 (0.92–1.18) |
Period by mean solar radiation (lag 5 days) | 0.86 (0.77 – 0.96) | 1.09 (1.04 – 1.13) | 0.98 (0.87 – 1.11) | 1.05 (1.01 – 1.08) | 0.84 (0.55 – 1.27) | 1.41 (1.01 – 1.96) | 1.38 (0.99 – 1.92) | 0.98 (0.93–1.04) |