Abstract
Background
Due to climate change, days with high temperatures are becoming more frequent. Although the effect of high temperature on the kidneys has been reported in research from Central and South America, Oceania, North America and Europe, evidence from Asia is still lacking. This study aimed to examine the association between short-term exposure to high temperatures and acute kidney injury (AKI) in a nationwide study in South Korea.
Methods
We used representative sampling data from the 2002–2015 National Health Insurance Service–National Sample Cohort in South Korea to link the daily mean temperatures and AKI cases that occurred in the summer. We used a bidirectional case-crossover study design with 0–7 lag days before the emergency room visit for AKI. In addition, we stratified the data into six income levels to identify the susceptible population.
Results
A total of 1706 participants were included in this st udy. The odds ratio (OR) per 1°C increase at 0 lag days was 1.051, and the ORs per 1°C increase at a lag of 2 days were both 1.076. The association between exposure to high temperatures and AKI was slightly greater in the low-income group (OR = 1.088; 95% CI: 1.049–1.128) than in the high-income group (OR = 1.065; 95% CI: 1.026–1.105).
Conclusions
In our study, a relationship between exposure to high temperatures and AKI was observed. Precautions should be taken at elevated temperatures to minimize the risk of negative health effects.
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