Even though PM1 (particulate matter [PM] with aerodynamic diameter 1 m]) makes up the majority of ambient fine particles (PM2.5), research on its immediate consequences on cardiovascular diseases (CVDs) in China is still lacking.
In a southern Chinese metropolis, this study intends to assess the short-term relationships between exposures to size-specific PMs (namely, PM1, PM2.5, and PM10) and hospital admissions for CVDs.
Hospitalization for cardiovascular illnesses and size-specific particle air pollution: a case-crossover study in Shenzhen, China
Methods:
- Between January 1st, 2015, and December 31st, 2017, we gathered 5,969 records of hospital admissions for cardiovascular diseases (CVDs), daily average air pollution concentrations, and weather data in Shenzhen.
- We used conditional logistic regression models and a time-stratified case-crossover approach to examine short-term relationships between size-specific PMs and CVD hospitalizations across various exposure days.
Results:
- The annual average PM1, PM2.5, and PM10 concentrations over the study period were 18.7, 27.8, and 45.4 g/m, respectively.
- PM1 showed a generally greater connection with CVD hospitalizations than PM2.5 or PM10 did.
- According to a 10-g/m3 increment in exposure to PM1, PM2.5, and PM10 at lag 03 days, hospital admissions for CVDs increased by 6.7% (95% confidence interval: 1.2-12.5%), 4.5% (0.4-8.7%), and 3.4% (0.5-6.3%), respectively.
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