The role of particle composition on the association between PM2.5 and mortality.

ABSTRACT:

Background

Although the association between exposure to particulate matter (PM) mass and mortality is well established, there remains uncertainty about which chemical components of PM are most harmful to human health.

Methods

A hierarchical approach was used to determine how the association between daily PM2.5 mass and mortality was modified by PM2.5 composition in 25 US communities. First, the association between daily PM2.5 and mortality was determined for each community and season using Poisson regression. Second, we used meta-regression to examine how the pooled association was modified by community and season-specific particle composition.

Results

There was a 0.74% (95% confidence interval = 0.41%-1.07%) increase in nonaccidental deaths associated with a 10 micro

SUBMITTER: Franklin M 

PROVIDER: S-EPMC3755878 | biostudies-literature | 2008 Sep

REPOSITORIES: biostudies-literature