Association between NO2 cumulative exposure and influenza prevalence in mountainous regions: A case study from southwest China.

Association between NO2 cumulative exposure and influenza prevalence in mountainous regions: A case study from southwest China. Environ Res. 2020 Oct;189:109926 Authors: Zeng W, Zhao H, Liu R, Yan W, Qiu Y, Yang F, Shu C, Zhan Y Abstract While accumulating evidence shows that air pollution exposure is an important risk factor to influenza prevalence, their association has been inadequately investigated in mountainous regions with dense populations and high humidity. We aim to estimate the association and exposure-outcome effects between exposure to nitrogen dioxide (NO2) and influenza prevalence in a mountainous region with a dense population and high humidity. We investigated 14,993 patients with confirmed influenza cases from January 2013 to December 2017 in Chongqing, a mountainous city in southwest China. We developed distributed lag non-linear models with quasi-Poisson link to take into account the lag and non-linear effects of NO2 exposure on influenza prevalence. We estimated that the cumulative effect of a 10 μg/m3 increase in NO2 with seven-day lag (i.e., summing all the contributions up to seven days) corresponded to relative risk of 1.24 (95% CI: 1.17-1.31) in daily influenza prevalence. Comparing to annual mean of the World Health Organization air quality guidelines of 40 μg/m3 for NO2, we estimated that 14.01% (95% CI: 10.69-17.08%) of the influenza cases were attributable to excessive NO2 exposure. Our results sugge...
Source: Environmental Research - Category: Environmental Health Authors: Tags: Environ Res Source Type: research