Seasonal variation in health effects of particulate matter in Tianjin

Mengnan Zhang; Yang NI; Qiang Zeng

Return

Seasonal variation in health effects of particulate matter in Tianjin

VernacularTitle:天津市大气颗粒物对健康影响的季节性差异研究
Author: Mengnan ZHANG ^{1
,

2} ; Yang NI ² ; Qiang ZENG ^{1
,

2}
Author Information

1. School of Public Health, Tianjin Medical University, Tianjin 300070, China
2. Institute for Occupational Health, Tianjin Centers for Disease Control and Prevention, Tianjin 300011, China.
Publication Type:Selectedarticle
Keywords: seasonal; particulate matter; mortality; years of life lost; exposure-response relationship
From: Journal of Environmental and Occupational Medicine 2022;39(6):652-658
CountryChina
Language:Chinese
Abstract: Background Adverse health effects associated with particulate matter have been demonstrated, but findings on seasonal variation in the health impacts are inconsistent. Objective To explore potential seasonal variation in particulate matter (PM_2.5 and PM₁₀) associated daily non-accidental mortality and corresponding years of life loss (YLL) in Tianjin. Methods The daily data of non-accidental deaths, air pollution, and meteorological factors in Tianjin from 2014 to 2019 were collected. A generalized additive model, with adjusting selected confounding factors such as temperature, relative humidity, long-term trends, day of the week, and holiday, was used to quantitatively evaluate the relationships of PM_2.5 and PM₁₀ with daily non-accidental deaths and YLL. Results The effects of PM_2.5 and PM₁₀ on daily non-accidental mortality and corresponding YLL were statistically significant in full year, spring, summer, and autumn (except for the effect of PM₁₀ on non-accidental YLL in spring), but not statistically significant in winter. The non-accidental mortality and it's 95%CI increased by 0.28% (0.11%-0.44%) and 0.24% (0.11%-0.36%) in full year, 0.44% (0.11%-0.77%) and 0.17% (0.00%-0.33%) in spring, 1.32% (0.50%-2.16%) and 2.15% (1.54%-2.76%) in summer, and 0.68% (0.30%-1.06%) and 0.57% (0.28%-0.87%) in autumn for every 10 µg·m⁻³ increase in PM_2.5 and PM₁₀ concentrations, respectively; the corresponding YLL and it's 95%CI increased by 7.41 (2.42-13.07) and 5.75 (1.94-9.57), 13.11 (3.00-23.22) and 2.88 (−2.82-8.59), 34.66 (11.92-57.40) and 48.12 (31.48-64.75), and 16.13 (4.57-27.70) and 12.60 (3.56-21.65) person-years, respectively. When adopting the limits in the Global Air Quality Guidelines (2021) as the reference, excess deaths and YLL caused by PM_2.5 and PM₁₀ exposure were the greatest in summer. The excess deaths and it's 95%CI were 5.38 (5.08-5.69) and 8.62 (7.95-9.28), and the excess YLL and it's 95%CI were 112.23 (105.79-118.67) and 156.94 (44.99-168.89) person-years, respectively. Conclusion The effects of particulate matter on non-accidental mortality and corresponding YLL may vary seasonally in Tianjin with the greatest effects in summer, suggesting that the health protection related to particulate matter should be strengthened in summer.