Figure 1. All-Cause Mortality Rate Ratios (RRs) by Age at Quitting Smoking and by Sex Compared With Never and Current Smoking Among Individuals at Risk Aged 25 to 89 Years.

Adjusted for age at risk, sex, educational level, alcohol consumption, and race and ethnicity. Markers represent RRs, and horizontal lines represent 95% CIs. Lower risk indicates lower risk of mortality, and higher risk indicates higher risk of mortality.