Ambient fine particulate matter and daily mortality: a comparative analysis of observed and estimated exposure in 347 cities.
Int J Epidemiol
; 53(3)2024 Apr 11.
Article
in En
| MEDLINE
| ID: mdl-38725299
ABSTRACT
BACKGROUND:
Model-estimated air pollution exposure products have been widely used in epidemiological studies to assess the health risks of particulate matter with diameters of ≤2.5 µm (PM2.5). However, few studies have assessed the disparities in health effects between model-estimated and station-observed PM2.5 exposures.METHODS:
We collected daily all-cause, respiratory and cardiovascular mortality data in 347 cities across 15 countries and regions worldwide based on the Multi-City Multi-Country collaborative research network. The station-observed PM2.5 data were obtained from official monitoring stations. The model-estimated global PM2.5 product was developed using a machine-learning approach. The associations between daily exposure to PM2.5 and mortality were evaluated using a two-stage analytical approach.RESULTS:
We included 15.8 million all-cause, 1.5 million respiratory and 4.5 million cardiovascular deaths from 2000 to 2018. Short-term exposure to PM2.5 was associated with a relative risk increase (RRI) of mortality from both station-observed and model-estimated exposures. Every 10-µg/m3 increase in the 2-day moving average PM2.5 was associated with overall RRIs of 0.67% (95% CI 0.49 to 0.85), 0.68% (95% CI -0.03 to 1.39) and 0.45% (95% CI 0.08 to 0.82) for all-cause, respiratory, and cardiovascular mortality based on station-observed PM2.5 and RRIs of 0.87% (95% CI 0.68 to 1.06), 0.81% (95% CI 0.08 to 1.55) and 0.71% (95% CI 0.32 to 1.09) based on model-estimated exposure, respectively.CONCLUSIONS:
Mortality risks associated with daily PM2.5 exposure were consistent for both station-observed and model-estimated exposures, suggesting the reliability and potential applicability of the global PM2.5 product in epidemiological studies.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Cardiovascular Diseases
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Cities
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Air Pollutants
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Air Pollution
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Environmental Exposure
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Particulate Matter
Limits:
Adult
/
Aged
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Female
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Humans
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Male
/
Middle aged
Language:
En
Journal:
Int J Epidemiol
Year:
2024
Document type:
Article
Affiliation country:
Australia