Interaction Effects of Air Pollution and Climatic Factors on Circulatory and Respiratory Mortality in Xi’an, China between 2014 and 2016

Kingsley Katleho Mokoena, Crystal Jane Ethan, Yan Yu and Asenso Theophilus Quachie
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Kingsley Katleho Mokoena: School of Public Health, Xi’an Jiaotong University, Health Science Center, Xi’an 710061, China
Crystal Jane Ethan: School of Public Health, Xi’an Jiaotong University, Health Science Center, Xi’an 710061, China
Yan Yu: School of Public Health, Xi’an Jiaotong University, Health Science Center, Xi’an 710061, China
Asenso Theophilus Quachie: School of Mathematics, Northwest University, Xi’an 710127, China

IJERPH, 2020, vol. 17, issue 23, 1-15

Abstract: Several studies have reported that air pollution and climatic factors are major contributors to human morbidity and mortality globally. However, the combined interactive effects of air pollution and climatic factors on human health remain largely unexplored. This study aims to investigate the interactive effects of air pollution and climatic factors on circulatory and respiratory mortality in Xi’an, China. Time-series analysis and the distributed lag non-linear model (DLNM) were employed as the study design and core statistical method. The interaction relative risk (IRR) and relative excess risk due to interaction (RERI) for temperature and Air Quality Index (AQI) interaction on circulatory mortality were 0.973(0.969, 0.977) and −0.055(−0.059, −0.048), respectively; while for relative humidity and AQI interaction, 1.098(1.011, 1.072) and 0.088(0.081, 0.107) respectively, were estimated. Additionally, the IRR and RERI for temperature and AQI interaction on respiratory mortality were 0.805(0.722, 0.896) and −0.235(−0.269, −0.163) respectively, while 1.008(0.965, 1.051) and −0.031(−0.088, 0.025) respectively were estimated for relative humidity and AQI interaction. The interaction effects of climatic factors and AQI were synergistic and antagonistic in relation to circulatory and respiratory mortality, respectively. Interaction between climatic factors and air pollution contributes significantly to circulatory and respiratory mortality.

Keywords: interaction mechanism; meteorological condition; mortality; climatic change; distributed lag non-linear model; air pollution (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2020
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