Relationship Between Cold Temperature and Cardiovascular Mortality, With Assessment of Effect Modification by Individual Characteristics – Ibaraki Prefectural Health Study –

Akiko Atsumi; Kayo Ueda; Fujiko Irie; Toshimi Sairenchi; Kyoko Iimura; Hiroshi Watanabe; Hiroyasu Iso; Hitoshi Ota; Kazutaka Aonuma

doi:10.1253/circj.CJ-12-0916

Circulation Journal

Online ISSN : 1347-4820
Print ISSN : 1346-9843
ISSN-L : 1346-9843

Preventive Medicine

Relationship Between Cold Temperature and Cardiovascular Mortality, With Assessment of Effect Modification by Individual Characteristics

– Ibaraki Prefectural Health Study –

Akiko Atsumi, Kayo Ueda, Fujiko Irie, Toshimi Sairenchi, Kyoko Iimura, Hiroshi Watanabe, Hiroyasu Iso, Hitoshi Ota, Kazutaka Aonuma

Author information

Akiko Atsumi
Faculty of Medicine, Graduate School of Comprehensive Human Sciences, University of Tsukuba
Kayo Ueda
Environmental Epidemiology Section, Center for Environmental Health Sciences, National Institute for Environmental Studies
Fujiko Irie
Department of Health and Welfare, Ibaraki Prefectural Office
Toshimi Sairenchi
Department of Public Health, Dokkyo Medical University School of Medicine
Ibaraki Health Plaza, Ibaraki Health Service Association
Kyoko Iimura
Ibaraki Health Plaza, Ibaraki Health Service Association
Hiroshi Watanabe
Ibaraki Health Service Association
Hiroyasu Iso
Public Health, Department of Social and Environmental Medicine, Graduate School of Medicine, Osaka University
Hitoshi Ota
Ibaraki Health Plaza, Ibaraki Health Service Association
Kazutaka Aonuma
Faculty of Medicine, Graduate School of Comprehensive Human Sciences, University of Tsukuba

Corresponding author

ORCID

Keywords: Air temperature, Cardiovascular mortality, Cohort study, Cold weather

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Supplementary material

2013 Volume 77 Issue 7 Pages 1854-1861

DOI https://doi.org/10.1253/circj.CJ-12-0916

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Details

Published: 2013 Received: July 17, 2012 Released on J-STAGE: June 25, 2013 Accepted: March 01, 2013 Advance online publication: April 17, 2013 Revised: February 01, 2013

Abstract

Background: Cold temperature has been reported to contribute to cardiovascular mortality, but it is not clear which people are more susceptible to cold temperature. Methods and Results: The relationship between ambient temperature and mortality was examined in 3,593 subjects from the Ibaraki Prefectural Health Study who died of cardiovascular disease during a mean follow-up period of 9.7±4.0 years. Daily values of meteorological variables were obtained from the Japan Meteorological Agency. Time-stratified case cross-over analysis was used. The multivariate odds ratios (ORs; 95% confidence interval) per 1°C decrease in daily maximum temperature over the day of death and the 2 days prior to this day adjusted for relative humidity were 1.018 (1.003–1.034) for all cardiovascular deaths and 1.025 (1.003–1.048) for stroke deaths. Risk-stratified analysis showed that younger subjects aged <80 years and those with hyperglycemia were more susceptible to cold temperature. The OR of all cardiovascular deaths related to cold temperature was 1.034 (1.012–1.056) for subjects aged <80 years, and that of stroke deaths was 1.076 (1.023–1.131) for those with hyperglycemia. Conclusions: Exposure to cold temperature triggers cardiovascular deaths. Additionally, younger age and hyperglycemia could enhance susceptibility to cold temperature. (Circ J 2013; 77: 1854–1861)

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