Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 716, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2020.136682
Keywords
Influenza and pneumonia; Mortality; Disease burden; Absolute humidity
Categories
Funding
- High-level Medical Reserved Personnel Training Project of Chongqing, Chongqing Health Commission Program [2019GDRC014]
- China Postdoctoral Science Foundation [2019M660754]
- National Basic Research Programof China (973 Program) [2012CB955504]
- National Key Research and Development Program of China [2018YFC0213602]
- Guangdong Natural Science Foundation [2018A030310655]
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Objective: To examine the association between absolute humidity (AH) and influenza and pneumonia (P&I) mortality, and to quantify P&l mortality burden attributable to non-optimum AHs among elderly people aged >= 65 years in Chongqing, the largest municipality of China. Methods: Daily data of P&I mortality from 2012 to 2018, and the contemporaneous meteorological data in the study area were collected. Distributed lag non-linear model (DLNM) was applied to estimate the non-linear and delayed effects of absolute humidity (AH) on P&l mortality:then, attributable deaths were calculated for the dry and moist AH, defined as AH below and above the minimum mortality AH (MMAH), respectively. Moderate and extreme AHs were defined using cutoffs at the 25th and 97.5th percentiles of AH. Results: The relationship between AH and P&I mortality was a U-shaped curve. The MMAH was 11.5 g/m(3) (46.4th percentile). In total, 25.7% (95% confidence interval: 10.0-38.2) of P&I mortality (4673 deaths) was attributed to non-optimum AHs. Low AHs were responsible for 12.7% of the P&l death burden (95%CI: 02-20.1), while high AHs for 13.0% (95%CI: -9.4-25.7). Extreme low and high AHs accounted for 3.7% (95%CI: 0.1-6.8) and 3.0% (95%CI: 0-5.4) of P&I mortality. Conclusions: Our study showed that both low AHs and high AHs are responsible for considerable AH-related P&I mortality burden among elderly people. Our results may have important public health implications for the development of relevant intervention policies to reduce P&I deaths among the elderly. (C) 2020 Published by Elsevier B.V.
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