Association between long-term green space exposure and mortality in China : A difference-in-differences analysis of national data in 2000, 2010 and 2019

Copyright © 2023. Published by Elsevier B.V..

BACKGROUND: Effects of green space on human health have been well-documented in western, high-income countries. Evidence for similar effects in China is limited. Moreover, the underlying mechanisms linking green space and mortality are yet to be established. We therefore conducted a nation-wide study to assess the association between green space and mortality in China using a difference-in-difference approach, which applied a causal framework and well controlled unmeasured confounding. In addition, we explored whether air pollution and air temperature could mediate the association.

METHODS: In this analysis, we collected data on all-cause mortality and sociodemographic characteristics for each county in China from the 2000 and 2010 censuses and the 2020 Statistical Yearbook. Green space exposure was assessed using county-level normalized difference vegetation index (NDVI) and the percentage of green space (forest, grasslands, shrub land and wetland). We applied a difference-in-differences approach to evaluate the association between green space and mortality. We also performed mediation analysis (by air pollution and air temperature).

RESULTS: Our sample consisted of 2726 counties in 2000 and 2010 as well as 1432 counties in 2019. In the 2000 versus 2019 comparison, a 0.1 unit increase in NDVI was associated with a 2.4 % reduction in mortality [95 % confidence interval (CI) 0.4-4.3 %], and a 10 % increase in percentage of green space was associated with a 4.7 % reduction (95 % CI 0-9.2 %) in mortality. PM2.5 and air temperature mediated 0.3 % to 12.3 % of the associations.

CONCLUSIONS: Living in greener counties may be associated with lower risk of mortality in China. These findings could indicate the potential of a population-level intervention to reduce mortality in China, which has important public health implications at the county level.

Medienart:

E-Artikel

Erscheinungsjahr:

2023

Erschienen:

2023

Enthalten in:

Zur Gesamtaufnahme - volume:887

Enthalten in:

The Science of the total environment - 887(2023) vom: 20. Aug., Seite 164023

Sprache:

Englisch

Beteiligte Personen:

Li, Cong-Cong [VerfasserIn]
Du, Zhi-Cheng [VerfasserIn]
Fan, Shu-Jun [VerfasserIn]
Mute Browning, Matthew H E [VerfasserIn]
Knibbs, Luke D [VerfasserIn]
Bloom, Michael S [VerfasserIn]
Zhao, Tian-Yu [VerfasserIn]
Jalaludin, Bin [VerfasserIn]
Heinrich, Joachim [VerfasserIn]
Liu, Xiao-Xuan [VerfasserIn]
Li, Jia-Xin [VerfasserIn]
Zhang, Yi-Dan [VerfasserIn]
Hu, Li-Xin [VerfasserIn]
Xiang, Ming-Deng [VerfasserIn]
Chen, Gong-Bo [VerfasserIn]
Wang, Qing [VerfasserIn]
Han, Chun-Lei [VerfasserIn]
Li, Shan-Shan [VerfasserIn]
Guo, Yu-Ming [VerfasserIn]
Dadvand, Payam [VerfasserIn]
Dong, Guang-Hui [VerfasserIn]
Zhang, Zhou-Bin [VerfasserIn]
Yang, Bo-Yi [VerfasserIn]

Links:

Volltext

Themen:

Air Pollutants
China
Difference-in-differences analysis
Green space
Greenness
Journal Article
Mortality
Particulate Matter

Anmerkungen:

Date Completed 14.06.2023

Date Revised 14.06.2023

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1016/j.scitotenv.2023.164023

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM356757021