The British Doctors’ Study was the first large prospective cohort study to examine the health consequences of smoking. In 1951, British doctors were sent a brief questionnaire about whether they smoked tobacco. Since then, information about their deaths has been collected. This data set records the number of deaths and person-years of follow-up in various categories 10 years after the initial questionnaire was sent out.
Age: Age at baseline, categorized (35 to 44, 45 to 54, 55 to 64, 65 to 74, 75 to 84)Smoking: Smoking category (smoker, non-smoker)Deaths: Total number of deathsPersonYears: Total years of follow-up, added over all persons in the categoryDobson AJ and Barnett AG (2008). An Introduction to Generalized Linear Models, Third Edition. CRC Press.