© 2004 BMJ Publishing Group Ltd
ECHO
Mortality in relation to smoking: 50 years’ observations on male British doctors
| The first 150 words of the full text of this article appear below. |
Objective: To compare the hazards of cigarette smoking in men who formed their habits at different periods, and the extent of the reduction in risk when cigarette smoking is stopped at different ages.
Design: Prospective study that has continued from 1951 to 2001.
Setting: United Kingdom.
Participants: 34 439 male British doctors. Information about their smoking habits was obtained in 1951, and periodically thereafter; cause specific mortality was monitored for 50 years.
Main outcome measures: Overall mortality by smoking habit, considering separately men born in different periods.
Results: The excess mortality associated with smoking chiefly involved vascular, neoplastic, and respiratory diseases that can be caused by smoking. Men born in 1900–1930 who smoked only cigarettes and continued smoking died on average about 10 years younger than lifelong non-smokers. Cessation at age 60, 50, 40, or 30 years gained, respectively, about 3, 6, 9, or 10 years of life expectancy. The
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