Association between ambient temperature and hospital admissions for respiratory diseases in Dien Bien province, Vietnam from 2012 to 2019: a time-series analysis.

Abstract Background: This study aimed to evaluate the relationship between ambient temperature and the number of admissions for respiratory diseases in Dien Bien province from 2012 to 2019. Methodology: The study used time series analysis with Poisson regression. The output variables considered in this analysis include respiratory diseases, upper respiratory tract infection, pneumonia, asthma and COPD. We obtained all patients admissioned to DienBien general hospital from 2012 to 2019 due to respiratory diseases (ICD 10). Daily mean weather factors in the same period were also collected. Results: We recorded a total of 28189 hospital admissions for respiratory diseases, 9971 admissions for upper respiratory tract infection, 15190 for pneumonia, 3028 for COPD and asthma. The study found negative significant associttion between temparature and daily admissions for upper respiratory infection, with RR = 0,48, (95%CI: 0.32-0,99) per 10°C increament of the 21-day moving average temperature. In contrast, admissions for COPD and asthma were positive associcated with minimum temperature, RR = 3,98 (95% CI: 1,01-5,87) per 10°C increament of the 21-day average minimum temperature. Conclusion: Children and the elderly are groups sensitive to the changes of temperature. Thus, Dien Bien province need to establish measure to response to environment change. Key words: Ambient temperature, respiratory diseases, asthma, COPD, children, Dien Bien.