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Effects of smoking on survival from age 35 years in males:

British Doctors' Study, 1951-2001

Graph showing effects of smoking on survival

Comment: Lifelong smoking cuts life expectancy by 10 years. (In other findings from this study, quitting smoking in early middle age restores most of that loss.)

Source: These findings come from the British Doctors' Study, which recruited 34,000 male doctors in 1951, then observed their lifestyles and health for another 50 years.

Citation: Doll R, Peto R, Boreham, J, Sutherland I. Mortality in relation to smoking: 50 years' observations on male British doctors. BMJ 2004;328:1519-33. [doi:10.1136/bmj.38142.554479.AE]

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