Table 2: Effect modification of composition on the estimated percent increase in mortality with a 10-μg/m3 increase in PM2.5 (from Franklin et al. 2008)

From: Semi-continuous speciation analyses for ambient air particulate matter: An urgent need for health effects studies

CauseSpeciesP-value for effect modification by species to PM2.5 mass proportionIncrease in non-accidental mortality per 10 μg/m3 increase in PM2.5 for an interquartile increase in species to PM2.5 mass proportiona (%)Heterogeneity explained (%)b
Non-accidental univariateAI<0.0010.5845
Non-accidental multivariate (1)AI<0.0010.79 
Non-accidental multivariate (2)AI<0.0010.61 
  1. aAdjusted for temperature.
  2. bIncludes heterogeneity explained by temperature.