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Short-Term Effect of Temperature on Daily Emergency Visits for Acute Myocardial Infarction with Threshold Temperatures

BACKGROUND: The relationship between temperature and myocardial infarction has not been fully explained. In this study, we identified the threshold temperature and examined the relationship between temperature and emergency admissions due to MI in Korea. METHODS: Poisson generalized additive model a...

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Autores principales: Lee, Suji, Lee, Eunil, Park, Man Sik, Kwon, Bo Yeon, Kim, Hana, Jung, Dea Ho, Jo, Kyung Hee, Jeong, Myung Ho, Rha, Seung-Woon
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4000206/
https://www.ncbi.nlm.nih.gov/pubmed/24770787
http://dx.doi.org/10.1371/journal.pone.0094070
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author Lee, Suji
Lee, Eunil
Park, Man Sik
Kwon, Bo Yeon
Kim, Hana
Jung, Dea Ho
Jo, Kyung Hee
Jeong, Myung Ho
Rha, Seung-Woon
author_facet Lee, Suji
Lee, Eunil
Park, Man Sik
Kwon, Bo Yeon
Kim, Hana
Jung, Dea Ho
Jo, Kyung Hee
Jeong, Myung Ho
Rha, Seung-Woon
author_sort Lee, Suji
collection PubMed
description BACKGROUND: The relationship between temperature and myocardial infarction has not been fully explained. In this study, we identified the threshold temperature and examined the relationship between temperature and emergency admissions due to MI in Korea. METHODS: Poisson generalized additive model analyses were used to assess the short-term effects of temperature (mean, maximum, minimum, diurnal) on MI emergency visits, after controlling for meteorological variable and air pollution (PM10, NO(2)). We defined the threshold temperature when the inflection point showed a statistically significant difference in the regression coefficients of the generalized additive models (GAMs) analysis. The analysis was performed on the following subgroups: geographical region, gender, age (<75 years or ≥75 years), and MI status (STEMI or non-STEMI). RESULTS: The threshold temperatures during heat exposure were for the maximum temperature as 25.5–31.5°C and for the mean temperature as 27.5–28.5°C. The threshold temperatures during cold exposure were for the minimum temperature as −2.5–1.5°C. Relative risks (RRs) of emergency visits above hot temperature thresholds ranged from 1.02 to 1.30 and those below cold temperature thresholds ranged from 1.01 to 1.05. We also observed increased RRs ranged from 1.02 to 1.65 of emergency visits when temperatures changes on a single day or on successive days. CONCLUSIONS: We found a relationship between temperature and MI occurrence during both heat and cold exposure at the threshold temperature. Diurnal temperature or temperature change on successive days also increased MI risk.
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spelling pubmed-40002062014-04-29 Short-Term Effect of Temperature on Daily Emergency Visits for Acute Myocardial Infarction with Threshold Temperatures Lee, Suji Lee, Eunil Park, Man Sik Kwon, Bo Yeon Kim, Hana Jung, Dea Ho Jo, Kyung Hee Jeong, Myung Ho Rha, Seung-Woon PLoS One Research Article BACKGROUND: The relationship between temperature and myocardial infarction has not been fully explained. In this study, we identified the threshold temperature and examined the relationship between temperature and emergency admissions due to MI in Korea. METHODS: Poisson generalized additive model analyses were used to assess the short-term effects of temperature (mean, maximum, minimum, diurnal) on MI emergency visits, after controlling for meteorological variable and air pollution (PM10, NO(2)). We defined the threshold temperature when the inflection point showed a statistically significant difference in the regression coefficients of the generalized additive models (GAMs) analysis. The analysis was performed on the following subgroups: geographical region, gender, age (<75 years or ≥75 years), and MI status (STEMI or non-STEMI). RESULTS: The threshold temperatures during heat exposure were for the maximum temperature as 25.5–31.5°C and for the mean temperature as 27.5–28.5°C. The threshold temperatures during cold exposure were for the minimum temperature as −2.5–1.5°C. Relative risks (RRs) of emergency visits above hot temperature thresholds ranged from 1.02 to 1.30 and those below cold temperature thresholds ranged from 1.01 to 1.05. We also observed increased RRs ranged from 1.02 to 1.65 of emergency visits when temperatures changes on a single day or on successive days. CONCLUSIONS: We found a relationship between temperature and MI occurrence during both heat and cold exposure at the threshold temperature. Diurnal temperature or temperature change on successive days also increased MI risk. Public Library of Science 2014-04-25 /pmc/articles/PMC4000206/ /pubmed/24770787 http://dx.doi.org/10.1371/journal.pone.0094070 Text en © 2014 Lee et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
spellingShingle Research Article
Lee, Suji
Lee, Eunil
Park, Man Sik
Kwon, Bo Yeon
Kim, Hana
Jung, Dea Ho
Jo, Kyung Hee
Jeong, Myung Ho
Rha, Seung-Woon
Short-Term Effect of Temperature on Daily Emergency Visits for Acute Myocardial Infarction with Threshold Temperatures
title Short-Term Effect of Temperature on Daily Emergency Visits for Acute Myocardial Infarction with Threshold Temperatures
title_full Short-Term Effect of Temperature on Daily Emergency Visits for Acute Myocardial Infarction with Threshold Temperatures
title_fullStr Short-Term Effect of Temperature on Daily Emergency Visits for Acute Myocardial Infarction with Threshold Temperatures
title_full_unstemmed Short-Term Effect of Temperature on Daily Emergency Visits for Acute Myocardial Infarction with Threshold Temperatures
title_short Short-Term Effect of Temperature on Daily Emergency Visits for Acute Myocardial Infarction with Threshold Temperatures
title_sort short-term effect of temperature on daily emergency visits for acute myocardial infarction with threshold temperatures
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4000206/
https://www.ncbi.nlm.nih.gov/pubmed/24770787
http://dx.doi.org/10.1371/journal.pone.0094070
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