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. 2013;23(6):418-23.
doi: 10.2188/jea.je20130012. Epub 2013 Aug 31.

High temperature as a risk factor for infectious diarrhea in Shanghai, China

Xiaodan Zhou  1 , Yanbing Zhou, Renjie Chen, Wenjuan Ma, Haiju Deng, Haidong Kan
Affiliations

High temperature as a risk factor for infectious diarrhea in Shanghai, China

Xiaodan Zhou et al. J Epidemiol. 2013.

Abstract

Background: Recent studies indicate that ambient temperature could be a risk factor for infectious diarrhea, but evidence for such a relation is limited in China.

Methods: We investigated the short-term association between daily temperature and physician-diagnosed infectious diarrhea during 2008-2010 in Shanghai, China. We adopted a time-series approach to analyze the data and a quasi-Poisson regression model with a natural spline-smoothing function to adjust for long-term and seasonal trends, as well as other time-varying covariates.

Results: There was a significant association between temperature and outpatient visits for diarrhea. A 1°C increase in the 6-day moving average of temperature was associated with a 2.68% (95% CI: 1.83%, 3.52%) increase in outpatient visits for diarrhea. We did not find a significant association between rainfall and infectious diarrhea.

Conclusions: High temperature might be a risk factor for infectious diarrhea in Shanghai. Public health programs should focus on preventing diarrhea related to high temperature among city residents.

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Figures

Figure 1.
Figure 1.. Seasonal trends in daily mean temperature and daily outpatient visits for diarrhea.
Figure 2.
Figure 2.. Percent increase in number of outpatient visits for diarrhea associated with a 1°C increase in mean temperature, by lag period.
Figure 3.
Figure 3.. Exposure–response curve of mean temperature (lag 05) by number of outpatient visits for diarrhea. df, degrees of freedom.
See this image and copyright information in PMC

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