Figure 4.

The estimated cold and hot effects of mean temperature on age-specific non-external mortality along the lag days, using 4 degrees of freedom natural cubic spline for lag. The cold effect (left) was estimated by 1^st percentile of temperature (19.35°C) relative to 25^th percentile of temperature (24.7°C)). The hot effect (right) was estimated by 99^th percentile of temperature (31.7°C) relative to 75^th percentile of temperature (28°C). The green lines are mean relative risks, and purple regions are 95% confidence intervals