Association of extreme high temperature weather with non-accidental deaths among residents of Yichang city: a time-stratified case-crossover analysis

ObjectiveTo analyze the correlation between extreme high temperature weather and non-accidental deaths among residents in Yichang city, Hubei province, and to provide a reference for reducing the risk of non-accidental deaths. MethodsData on 46 170 non-accidental deaths in urban areas of Yichang from 2014 to 2022 were collected from the death registration system of the Yichang Center for Disease Control and Prevention. Daily air pollution monitoring data from five national automatic air quality monitoring stations, as well as urban meteorological data during the same period, were also collected. A time-stratified case-crossover design with a conditional logistic regression model was used to analyze the effects of nine extreme high temperature events on the risk of non-accidental death among Yichang residents. These events included daily mean ambient air temperatures not lower than the 92.5th/95.0th/97.5th percentile during the study period and lasting 1, 2, or 3 days, abbreviated as P92.5/95.0/97.5-1/2/3 d. R