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Temperature as a risk factor of emergency department visits for acute kidney injury: a case-crossover study in Seoul, South Korea

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Authors
Kim, Satbyul E; Lee, Hyewon; Kim, Jayeun; Lee, Young Kyu; Kang, Minjin; Hijioka, Yasuaki; Kim, Ho
Issue Date
2019-06-14
Publisher
BioMed Central
Citation
Environmental Health. 18(1):55
Keywords
Ambient temperatureAcute kidney injuryEmergency department visitCase-crossover designExposure-response curve
Abstract
Background
Previous studies show that escalations in ambient temperature are among the risk factors for acute kidney injury (AKI). However, it has not been adequately studied in our location, Seoul, South Korea. In this study, we aimed to examine the association between ambient temperatures and AKI morbidity using emergency department (ED) visit data.

Methods
We obtained data on ED visits from the National Emergency Medical Center for 21,656 reported cases of AKI from 2010 to 2014. Time-stratified case-crossover design analysis based on conditional logistic regression was used to analyze short-term effects of ambient temperature on AKI after controlling for relevant covariates. The shape of the exposure–response curve, effect modification by individual demographic characteristics, season, and comorbidities, as well as lag effects, were investigated.

Results
The odds ratio (OR) per 1 °C increase at lag 0 was 1.0087 (95% confidence interval [CI]: 1.0041–1.0134). Risks were higher during the warm season (OR = 1.0149; 95% CI: 1.0065–1.0234) than during the cool season (OR = 1.0059; 95% CI: 1.0003–1.0116) and even higher above 22.3 °C (OR = 1.0235; 95% CI: 1.0230–1.0239).

Conclusions
This study provides evidence that ED visits for AKI were associated with ambient temperature. Early detection and treatment of patients at risk is important in both clinical and economic concerns related to AKI.
ISSN
1476-069X
Language
English
URI
http://hdl.handle.net/10371/156083
DOI
https://doi.org/10.1186/s12940-019-0491-5
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Graduate School of Public Health (보건대학원)Institute of Health and Environment (보건환경연구소)Journal Papers (저널논문_보건환경연구소)
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