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Sci Rep. 2017 Aug 31;7(1):10207. doi: 10.1038/s41598-017-10433-8.

An Investigation on Attributes of Ambient Temperature and Diurnal Temperature Range on Mortality in Five East-Asian Countries.

Author information

1
Graduated School of Public Health, Seoul National University, Seoul, Republic of Korea.
2
Institute of Environmental Medicine, Seoul National University of Medical Research Center, Seoul National University, Seoul, Republic of Korea.
3
Environmental Health Center, Seoul National University College of Medicine, Seoul, Republic of Korea.
4
Faculty of Health and Sports Sciences, University of Tsukuba, Tsukuba, Japan.
5
Department of Environmental and Occupational Medicine, National Taiwan University, Taipei, Taiwan.
6
Department of Statistics, Ewha Womans' University, Seoul, Republic of Korea.
7
Graduated School of Public Health, Seoul National University, Seoul, Republic of Korea. hokim@snu.ac.kr.

Abstract

Interest in the health effects of extremely low/high ambient temperature and the diurnal temperature range (DTR) on mortality as representative indices of temperature variability is growing. Although numerous studies have reported on these indices independently, few studies have provided the attributes of ambient temperature and DTR related to mortality, concurrently. In this study, we aimed to investigate and compare the mortality risk attributable to ambient temperature and DTR. The study included data of 63 cities in five East-Asian countries/regions during various periods between 1972 and 2013. The attributable risk of non-accidental death to ambient temperature was 9.36% (95% confidence interval [CI]: 8.98-9.69%) and to DTR was 0.59% (95% CI: 0.53-0.65%). The attributable cardiovascular mortality risks to ambient temperature (15.63%) and DTR (0.75%) are higher than the risks to non-accidental/respiratory-related mortality. We verified that ambient temperature plays a larger role in temperature-associated mortality, and cardiovascular mortality is susceptible to ambient temperature and DTR.

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