Figure 5. Summary CER (95% CI) of cold spells with different duration on total non-accidental mortality during lag 0–27 days in China, by age, gender, education, and causes of death.

CER: Cumulative excess risk of mortality for cold spell exposure during lag 0–27 days. A cold spell in this figure was defined as a weather fluctuation if the mean daily temperature fell below the 5th percentile of the study period (cold season in 2006–2011) in a specific community for at least 2 consecutive days. The duration of cold spells were divided into three groups: short duration (lasting 2 days), moderate duration (lasting 3 to 5 days) and long duration (lasting 6 days or more).