breslow                 package:boot                 R Documentation

Smoking Deaths Among Doctors

Description:

     The 'breslow' data frame has 10 rows and 5 columns.

     In 1961 Doll and Hill sent out a questionnaire to all men on the
     British  Medical Register enquiring about their smoking habits.
     Almost 70% of  such men replied.  Death certificates were obtained
     for medical practitioners and causes of death were assigned on the
     basis of these certificates.  The 'breslow' data set contains the
     person-years of observations and deaths from coronary artery
     disease accumulated during the first ten years of the study.

Usage:

     data(breslow)

Format:

     This data frame contains the following columns:

     'age' The mid-point of the 10 year age-group for the doctors.

     'smoke' An indicator of whether the doctors smoked (1) or not (0).

     'n' The number of person-years in the category.

     'y' The number of deaths attributed to coronary artery disease.

     'ns' The number of smoker years in the category ('smoke*n').

Source:

     The data were obtained from

     Breslow, N.E. (1985) Cohort Analysis in Epidemiology. In  _A
     Celebration of Statistics_  A.C. Atkinson and S.E. Fienberg
     (editors), 109-143. Springer-Verlag.

References:

     Davison, A.C. and Hinkley, D.V. (1997)  _Bootstrap Methods and
     Their Application_. Cambridge University Press.

     Doll, R. and Hill, A.B. (1966) Mortality of British doctors in
     relation to  smoking: Observations on coronary thrombosis. 
     _National Cancer Institute Monograph_, *19*, 205-268.

