Fig. 1From: The impact of long-term PM2.5 exposure on specific causes of death: exposure-response curves and effect modification among 53 million U.S. Medicare beneficiariesNon-linear and Linear Association of PM2.5 and Non-Accidental, Cardiovascular, Respiratory and Lung Cancer Mortality, SES-Adjusted. The non-linear and linear association of PM2.5 on cause-specific mortality: Non-Accidental, Cardiovascular, Respiratory and Lung Cancer. All analyses are conducted by Cox Proportional Hazard model with strata for age, sex, race, ZIP code and adjusted for SES. Bold solid line represents non-linear association estimated using restricted cubic spline (3 knots); dashed line represents 95% CIs for the non-linear, and dotted line represents linear association. RRs are based on comparisons to RRs for 0 μg/m3. Abbreviations: SES (socio-economic status), PM2.5 (fine particle, aerodynamic diameters < 2.5 μm)Back to article page