Using health and environmental data from the Multi-City Multi-Country (MCC) Collaborative Research Network database, Yuming Guo, MD, PhD, of the department of epidemiology; and preventive medicine at Monash University in Melbourne; Australia, and colleagues assessed the association between inhalable particulate matter (PM10) and fine particulate matter (PM2.5) with daily all-cause; CV and respiratory mortality in 652 urban areas in 24 countries or regions from 1986 to 2015.
Increases in PM10 concentration
“Though concentrations of air pollution in Australia are lower than in other countries; the study found that Australians are more sensitive to particulate matter air pollution and cannot effectively resist its adverse impacts. however, this may be attributed to Australians’ physiological functions having; adapted to living in areas with low levels of particulate matter air pollution,” Guo said.
Notably, the researchers also found stronger associations between PM10 and PM2.5concentrations and all-cause mortality; with lower annual concentrations of particulate matter and with higher annual temperatures (P < .001 for all comparisons). In further analyses, the pooled concentration-response curves demonstrated; a consistent increase in daily mortality as particulate matter concentration increased. Slopes also appeared steeper at lower concentrations; and flatter at higher concentrations.