Out-of-hospital cardiac arrest risk attributable to temperature in Japan

Several studies have estimated the associations between extreme temperatures and mortality and morbidity; however, few have investigated the attributable fraction for a wide range of temperatures on the risk of out-of-hospital cardiac arrest (OHCA). We obtained daily records of OHCA cases in the 47...

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Bibliographic Details
Published in:Scientific reports Vol. 7; no. 1; p. 39538
Main Authors: Onozuka, Daisuke, Hagihara, Akihito
Format: Journal Article
Language:English
Published: London Nature Publishing Group UK 03.01.2017
Nature Publishing Group
Subjects:
692/308/174
704/844/2739/2807
Adolescent
Adult
Aged
Aged, 80 and over
Cardiac arrest
Cardiopulmonary resuscitation
CPR
Female
Heart
Heart diseases
High temperature
Humanities and Social Sciences
Humans
Japan
Low temperature
Male
Middle Aged
Morbidity
multidisciplinary
Out-of-Hospital Cardiac Arrest - epidemiology
Out-of-Hospital Cardiac Arrest - etiology
Risk Factors
Science
Science (multidisciplinary)
Temperature
Temperature effects
Young Adult
Japan
ISSN:2045-2322, 2045-2322
Online Access:Get full text
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Summary:Several studies have estimated the associations between extreme temperatures and mortality and morbidity; however, few have investigated the attributable fraction for a wide range of temperatures on the risk of out-of-hospital cardiac arrest (OHCA). We obtained daily records of OHCA cases in the 47 Japanese prefectures between 2005 and 2014. We examined the relationship between OHCA and temperature for each prefecture using a Poisson regression model combined with a distributed lag non-linear model. The estimated prefecture-specific associations were pooled at the nationwide level using a multivariate random-effect meta-analysis. A total of 659,752 cases of OHCA of presumed-cardiac origin met the inclusion criteria. Overall, 23.93% (95% empirical confidence interval [eCI]: 20.15–26.19) of OHCA was attributable to temperature. The attributable fraction to low temperatures was 23.64% (95% eCI: 19.76–25.87), whereas that of high temperatures was 0.29% (95% eCI: 0.21–0.35). The attributable fraction for OHCA was related to moderate low temperature with an overall estimate of 21.86% (95% eCI: 18.10–24.21). Extreme temperatures were responsible for a small fraction. The majority of temperature-related OHCAs were attributable to lower temperatures. The attributable risk of extremely low and high temperatures was markedly lower than that of moderate temperatures.
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ISSN:2045-2322
2045-2322
DOI:10.1038/srep39538