Longitudinal study reveals significant links between PM2.5 components and heart disease risk, especially in southern and overweight individuals.
Key Points
This research aims to investigate the relationship between PM2.5 and its chemical components and heart disease risk across different populations in China.
Analyzed data from 8,172 participants in 123 cities in China.
Used Cox proportional hazards regression models and Weighted Quantile Sum regression to assess pollutant effects.
Conducted stratified analyses based on various demographic factors.
Each 1 µg/m³ increase in PM2.5 was associated with a 2.7% increase in heart disease risk (HR = 1.027, 95% CI: 1.022–1.032).
Black carbon (BC) showed the highest risk increase, with a 38.1% rise per 1 µg/m³ increase (HR = 1.381, 95% CI: 1.266–1.506).
The population attributable fraction for heart disease due to PM2.5 was 2.63%.