Residential greenness mitigates mortality risk from short-term airborne particulate exposure: An individual-level case-crossover study

Background: Studies suggested that greenness could reduce death risks related to ambient exposure to particulate matter (PM), while the available evidence was mixed across the globe and substantially exiguous in low- and middle-income countries. By conceiving an individual-level case-crossover study in central China, this analysis primarily aimed to quantify PM-mortality associations and examined the modification effect of greenness on the relationship. Methods: We investigated a total of 177,058 nonaccidental death cases from 12 counties in central China, 2008–2012. Daily residential exposures to PM2.5 (aerodynamic diameter