breslow                 package:boot                 R Documentation

_S_m_o_k_i_n_g _D_e_a_t_h_s _A_m_o_n_g _D_o_c_t_o_r_s

_A_r_g_u_m_e_n_t_s:

     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'). 

_S_U_M_M_A_R_Y:

     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.

_D_A_T_A _D_E_S_C_R_I_P_T_I_O_N:

     This data frame contains the following columns:

_S_O_U_R_C_E:

     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.

_O_T_H_E_R _R_E_F_E_R_E_N_C_E_S:

     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.

