Table 4. Mortality rates (per 1,000 person-years), rate ratios, and excess deaths from lung cancer and cardiovascular disease by smoking status, Doll and Hill physician cohort study, Great Britain, 1951-1961. Attributable Mortality rate per 1,000 person-years Excess deaths risk percent per 1,000 among Smokers Non-smokers All Rate ratio person-years smokers Lung cancer 1.30 0.07 0.94 18.5 1.23 95% Cardiovascular 9.51 7.32 8.87 1.3 2.19 23% disease Question 21: Which cause of death has a stronger association with smoking? Why