scholarly journals Assessment of Respiratory morbidity burden from exposure to vegetation fire-PM2.5 in Upper Northern Thailand for the year 2018

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Athicha Uttajug ◽  
Kayo Ueda ◽  
Hirohisa Takano ◽  
Akiko Honda
2019 ◽  
Vol 18 (1) ◽  
Author(s):  
Yiju Zhao ◽  
Zhao Huang ◽  
Shengyong Wang ◽  
Jianxiong Hu ◽  
Jianpeng Xiao ◽  
...  

Abstract Background There are significant associations between ambient temperature and respiratory disease mortality. However, few studies have assessed the morbidity burdens of various respiratory diseases that are attributable to different temperature ranges in subtropical regions. Methods Daily outpatient visits, weather variables, and air pollution data were collected from January 2013 to August 2017 in a hospital in Dongguan city. A standard time series quasi-Poisson regression with a distributed lag non-linear model (DLNM) was applied to estimate the associations between daily mean temperature and morbidity for total respiratory diseases, bronchiectasis, chronic obstructive pulmonary disease (COPD), and asthma. Attributable fractions were then calculated to quantify disease burden relative to different temperature components. Finally, we conducted stratified analysis by age group. Results Both low and high temperatures were associated with an increased risk of morbidity secondary to respiratory diseases. Compared with the optimum temperature, the accumulated relative risk (RR) during the seven lag days was 1.13 with a 95% confidence interval (CI) of 1.01–1.26 for extreme heat and 1.02 (95% CI: 0.99–1.05) for extreme cold. Heat-related respiratory morbidity risk was higher than cold-related risk for the total population, but an opposite result was observed for the elderly. About 8.4% (95% CI: 2.8–13.3%) of respiratory morbidity was attributable to non-optimal temperatures, and moderate heat was responsible for most of the excess respiratory morbidity (7.5, 95% CI: 2.4–12.2%). Conclusions We found that exposure to non-optimal temperatures increased the risk of respiratory morbidity in subtropical region, and moderate heat contributed to most of the temperature-related respiratory morbidities. This indicates a need for further examination of moderate, rather than extreme, heat in subtropical region.


2014 ◽  
Vol 18 (2) ◽  
pp. 85-90
Author(s):  
Won Hee Choi ◽  
Eun-Kyeong Yeon ◽  
Young-Lim Shin ◽  
Won Suk Suh ◽  
Jang Yong Jin

Author(s):  
M.A. Zemlianova ◽  
I.V. Tikhonova

Alumina refineries are among the leading sources of atmospheric air pollution with a wide range of pollutants hazardous to human respiratory organs. It is relevant to study and evaluate the occurrence of the risks for development of respiratory diseases in children living in the area affected by the emission components of an alumina refinery. We assessed air quality of the area under observation and comparison according to monitoring observations, risk of non-carcinogenic effects from the respiratory organs. The content of chemicals in the blood and urine adequate to risk factors was quantified. The structure of individual groups of respiratory diseases was analyzed. The causal relationships of violations of laboratory parameters with an increased content of chemicals in biological media were evaluated. It was found that an aerogenic exposure of chemical pollutants is formed on the territory with the production of metallurgical alumina. It determines the risk for development of respiratory diseases, exceeding an acceptable level up to 49.9 times. In the exposed children, the content of manganese, chromium, nickel, copper, xylenes, formaldehyde and aluminum, fluoride ion in the urine was increased to 4.2 times in relation to the indices in the comparison group. A high level of additional respiratory morbidity(1.8 times) was revealed. Chronic lymphoproliferative diseases of the nasopharynx and inflammatory diseases of the upper respiratory tract (up to 6.6 times more often), inflammatory diseases with a predominance of the mechanism of allergic inflammation ( up to 2.1 times more often)are more often detected in the framework of the respiratory diseases. Negative effects on the part of the respiratory system in the form of activation of antioxidant processes, the development of an inflammatory reaction, local, general and specific sensitization of the respiratory tract were established. It confirms the occurrence of the risks for the development of respiratory diseases in children in the exposure area of the chemical factors of alumina refinery-associated economic activity.


2009 ◽  
Vol 123 (6) ◽  
pp. 495-501 ◽  
Author(s):  
Bettina Zimmermann ◽  
Martin Bodner ◽  
Sylvain Amory ◽  
Liane Fendt ◽  
Alexander Röck ◽  
...  

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