Journal of Shandong University (Health Sciences) ›› 2018, Vol. 56 ›› Issue (8): 56-62.doi: 10.6040/j.issn.1671-7554.0.2018.052

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Impact of heatwaves on daily death from cardiovascular diseases: a case-crossover study

ZHANG Anran1, HU Wenqi1, LI Jiawei1, WEI Ran1, MA Wei1,2   

  1. 1. Department of Epidemiology, School of Public Health, Shandong University, Jinan 250012, Shandong, China;
    2. Shandong University Climate Change and Health Center, Jinan 250012, Shandong, China
  • Published:2022-09-27

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Abstract: Objective To estimate the impact of heatwave on daily death from cardiovascular diseases(CVD)in Jiaxing City, Zhejiang Province, China. Methods The definition of heatwave was a period at least 3 consecutive days with maximum temperature exceeding 35 ℃ in this study. Multivariate conditional Poisson regression models were applied to examine the heatwave-death association using the relative risk(RR)while adjusting for meteorological and air pollution factors including daily average temperature, average rainfall, average wind speed, average pressure and air pollution index. The impacts were analyzed by using time-stratified case-crossover design based on relevant data from 2008 to 2011 in Jiaxing City. The RR of different risk period was calculated to definite lag effects. Results Six heatwaves happened during the study period. The largest effect of the heatwave-CVD association was 1.342(95%CI: 1.081-1.667)at the 2 lag day. The risk of deaths from CVD among people ≥65 years old(RR=1.296, 95%CI: 1.027-1.636)and female(RR=1.407, 95%CI: 1.021-1.937)increased at the 2 lag day. Conclusion Heatwave has impacts on the daily deaths caused by CVD and there are lagged effects. People at risk are female and people ≥65.

Key words: Heatwave, Cardiovascular disease, Case-crossover design, Daily death, Lag effect

CLC Number: 

  • R181.3
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