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Effects of quitting Source: Health Education Authority Effects of cessation on total mortality One half of all cigarette smokers will be killed by smoking (BMJ 1994;309:901-11) Those who stop smoking before 35 years of age avoid almost all of the excess risk Between the ages of 35 and 69, 41% of smokers will die compared with 20% of non-smokers For every five smokers that quit before middle age, one avoids premature death 100 100 80 80 60 60 % Alive % Alive 40 40 20 20 0 0 40 55 70 85 100 40 55 70 85 100 Age Age Effects on survival after ages 45, 55, 65 & 75 of stopping smoking in previous decade Former smokers Former smokers stopped 45-54 stopped 35-44 100 100 80 80 60 60 % Alive % Alive 40 40 Former smokers Former smokers stopped 55-64 stopped 65+ 20 20 0 0 40 55 70 85 100 40 55 70 85 100 Age Age Doll et al BMJ 1994 Effects of cessation on cancer At age 60, 1 in 17 men or 1 in 24 women that stop smoking may avoid lung cancer(BMJ 2000;321:323-9) At age 50, 1 in 10 men or 1 in 14 women that stop smoking avoid lung cancer At age 40, 1 in 8 men