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. Author manuscript; available in PMC: 2021 Mar 12.

Published in final edited form as: Crit Rev Toxicol. 2020 Mar 12;50(3):189–200. doi: 10.1080/10408444.2020.1727410

Figures 1A–C. — Age-related modification of cumulative pack-years in (A) the full cohort, (B) former smokers, and (C) current smokers, using fully adjusted models. Lines illustrate the hazard ratio per 10 pack-years of smoking, and shading illustrates 95% confidence intervals around the hazard ratio. Red denotes models including PM_2.5 and cumulative pack-years only (with age interactions), and blue denotes models including PM_2.5, cumulative pack-years (with age interactions), years of smoking, and months since cessation.

Figures 1A–C. — Age-related modification of cumulative pack-years in (A) the full cohort, (B) former smokers, and (C) current smokers, using fully adjusted models. Lines illustrate the hazard ratio per 10 pack-years of smoking, and shading illustrates 95% confidence intervals around the hazard ratio. Red denotes models including PM_2.5 and cumulative pack-years only (with age interactions), and blue denotes models including PM_2.5, cumulative pack-years (with age interactions), years of smoking, and months since cessation.