Mortality risks from a spectrum of causes associated with wide-ranging exposure to fine particulate matter: A case-crossover study in Beijing, China

摘要

Background: Exposure to fine particulate matter (= 2.5 mu m in aerodynamic diameter; PM2.5) has been shown to be associated with an increased risk of mortality due to cardiovascular, respiratory, and other pulmonary diseases. However, fewer studies have investigated the relationship between ambient PM2.5 and human mortality for a wider range of causes of death, or for more specific causes of death within these broader categories, especially at the high PM2.5 concentrations currently experienced in Chinese megacities. Beijing, China, has a very large population and a wide range of PM2.5 exposures, allowing a prime opportunity to estimate such risks across a broad spectrum of causes, including rarer causes of death.