1937, The Journal of School Health, American School Health Association, page 144, By smoking twenty to thirty cigarettes a day for twenty-five years or more, a man ups his risk twenty-two times over that of a never smoker.
Source: wiktionary
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1937, The Journal of School Health, American School Health Association, page 144, By smoking twenty to thirty cigarettes a day for twenty-five years or more, a man ups his risk twenty-two times over that of a never smoker.
Source: wiktionary
Line A represents an immediate and complete reversal of the effect of smoking, so that the quitter almost instantly assumes the rate of the never smoker.
Source: wiktionary
In 1968 subjects classified themselves according to their present smoking behavior as either a smoker, ex-smoker or never smoker.
Source: wiktionary
... and the age-specific lung cancer death rate does not decline to that of the never smoker.
Source: wiktionary