Fig. 1
From: Long-term PM2.5 exposure and sepsis mortality in a US medicare cohort
Mortality hazard ratios* (95% CI) associated with a 10 μg/m3 increase in 12-month average PM2.5 and non-traffic PM2.5†for entire population and by subgroup, US 2000—2008. Abbreviations: CI Confidence interval, PM2.5 Particles with aerodynamic diameters < 2.5 μm, BRFSS Behavioral Risk Factor Surveillance System. * Estimated using Cox PH models with strata for age (1 year age categories with 90 + year old as one category), sex (male, female), race (white, non-white) and ZIP Code (38,715 ZIP codes), adjusted for ZIP code and state SES. †While all participants had valid PM2.5 measures assigned to their ZIP code of residence, NO2 estimates were available only for 91.2% of the Medicare populationÂ