Abstract
Although several studies indicated an association between diurnal temperature range (DTR) and mortality, the results about modifiers are inconsistent, and few studies were conducted in developing inland country. This study aims to evaluate the effects of DTR on cause-specific mortality and whether season, gender, or age might modify any association in Hefei city, China, during 2007–2016. Quasi-Poisson generalized linear regression models combined with a distributed lag non-linear model (DLNM) were applied to evaluate the relationships between DTR and non-accidental, cardiovascular, and respiratory mortality. We observed a J-shaped relationship between DTR and cause-specific mortality. With a DTR of 8.3 °C as the reference, the cumulative effects of extremely high DTR were significantly higher for all types of mortality than effects of lower or moderate DTR in full year. When stratified by season, extremely high DTR in spring had a greater impact on all cause-specific mortality than other three seasons. Male and the elderly (≥ 65 years) were consistently more susceptible to extremely high DTR effect than female and the youth (< 65 years) for non-accidental and cardiovascular mortality. To the contrary, female and the youth were more susceptible to extremely high DTR effect than male and the elderly for respiratory morality. The study suggests that extremely high DTR is a potential trigger for non-accidental mortality in Hefei city, China. Our findings also highlight the importance of protecting susceptible groups from extremely high DTR especially in the spring.
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Acknowledgments
This study was supported by the national monitoring project for the impact of air pollution on the people health (no fund number). Further appreciation is to all the staff members at the Hefei City Center for Disease Control and Prevention, Hefei, China, for the data collection.
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Tang, J., Xiao, Cc., Li, Yr. et al. Effects of diurnal temperature range on mortality in Hefei city, China. Int J Biometeorol 62, 851–860 (2018). https://doi.org/10.1007/s00484-017-1486-y
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DOI: https://doi.org/10.1007/s00484-017-1486-y