The Establishment of a New Air Health Index Integrating the Mortality Risks Due to Ambient Air Pollution and Non-Optimum Temperature

Qingli Zhang, Renjie Chen, Guanjin Yin, Xihao Du, Xia Meng, Yang Qiu, Haidong Kan, Maigeng Zhou

Engineering ›› 2022, Vol. 14 ›› Issue (7) : 156-162.

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Engineering ›› 2022, Vol. 14 ›› Issue (7) : 156-162. DOI: 10.1016/j.eng.2021.05.006
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The Establishment of a New Air Health Index Integrating the Mortality Risks Due to Ambient Air Pollution and Non-Optimum Temperature

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Abstract

A composite Air Health Index (AHI) is helpful for separately emphasizing the health risks of multiple stimuli and communicating the overall risks of an adverse atmospheric environment to the public. We aimed to establish a new AHI by integrating daily mortality risks due to air pollution with those due to non-optimum temperature in China. Based on the exposure-response (E-R) coefficients obtained from time-series models, the new AHI was constructed as the sum of excess mortality risk associated with air pollutants and non-optimum temperature in 272 Chinese cities from 2013 to 2015. We examined the association between the ″total AHI″ (based on total mortality) and total mortality, and further compared the ability of the ″total AHI″ to predict specific cardiopulmonary mortality with that of ″specific AHIs″ (based on specific mortalities). On average, air pollution and non-optimum temperature were associated with 28.23% of daily excess mortality, of which 23.47% was associated with non-optimum temperature while the remainder was associated with fine particulate matter (PM2.5) (1.12%), NO2 (2.29%,), and O3 (2.29%). The new AHI uses a 10-point scale and shows an average across all 272 cities of 6 points. The E-R curve for AHI and mortality is approximately linear, without any thresholds. Each one unit increase in ″total AHI″ is associated with a 0.84% increase in all-cause mortality and 1.01%, 0.98%, 1.02%, 1.66%, and 1.71% increases in cardiovascular disease, coronary heart disease, stroke, respiratory diseases, and chronic obstructive pulmonary disease mortality, respectively. Cause-specific mortality risk estimates using the ″total AHI″ are similar to those predicted by ″specific AHIs.″ In conclusion, the ″total AHI″ proposed herein could be a promising tool for communicating health risks related to exposure to the ambient environment to the public.

Keywords

Air pollution / Temperature / Air Health Index / Mortality / Time-series / Risk communication

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Qingli Zhang, Renjie Chen, Guanjin Yin, Xihao Du, Xia Meng, Yang Qiu, Haidong Kan, Maigeng Zhou. The Establishment of a New Air Health Index Integrating the Mortality Risks Due to Ambient Air Pollution and Non-Optimum Temperature. Engineering, 2022, 14(7): 156‒162 https://doi.org/10.1016/j.eng.2021.05.006

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