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High Temperature and Kidney disease Morbidity : A Systematic Review and Meta-analysis
Woo-Seok Lee1 , Woo-Sung Kim1 , Youn-Hee Lim2,3 , Yun-Chul Hong1,3
1Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Korea
2Institute of Environmental Medicine, Seoul National University Medical Research Center, Seoul, Republic of Korea, Seoul, Korea
3Environmental Health Center, Seoul National University College of Medicine, Seoul, Republic of Korea , Seoul, Korea
Corresponding Author: Yun-Chul Hong ,Tel: +82-2-740-8394, Fax: +82-2-747-4830, Email: ychong1@snu.ac.kr
Received: July 2, 2018;  Accepted: November 1, 2018.
ABSTRACT
Objectives:
During recent years, concerns about the impact of rising temperatures on health were a major issue. Our study is to investigate the relationship between elevated temperature and kidney disease by systematic review and meta-analysis.
Method:
In October 2017, two researchers independently searched related studies in PubMed and EMBASE. A meta-analysis using the random effect model was performed and only the studies that showed the odds ratio, the relative risk or percentage change, and the 95% confidence interval (CI) were included in the analysis and summarized the characteristics of each study. The Egger's test and funnel plot were used to evaluate publication bias.
Results:
In the final analysis, eleven studies that met the criteria were included. The pooled results suggest an increase of 30% [95% confidence interval(CI) 20% to 40%] in kidney disease morbidity with high temperature. In the disease-specific subgroup analysis, statistically significant results were observed in both renal colic or kidney stones and other renal diseases. In the study design-specific subgroup analysis, statistically significant results were observed in both time series and other study design. In the temperature measure-specific subgroup analysis, both groups also showed significant results.
Conclusions:
Our results indicate that the morbidity of kidney disease increases at high temperatures. We also found significant results in subgroup analysis. But further studies based on time series analysis are needed for more generalizable evidence.
Key words: High temperature; Kidney disease; Systematic review; Meta-analysis
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