bcmort                 package:ISwR                 R Documentation

_B_r_e_a_s_t _c_a_n_c_e_r _m_o_r_t_a_l_i_t_y

_D_e_s_c_r_i_p_t_i_o_n:

     Danish study on the effect of screening for breast cancer.

_U_s_a_g_e:

     bcmort

_F_o_r_m_a_t:

     A data frame with 24 observations on the following 4 variables.

     '_a_g_e' a factor with levels '50-54', '55-59', '60-64', '65-69',
          '70-74', and '75-79'.

     '_c_o_h_o_r_t' a factor with levels 'Study gr.', 'Nat.ctr.',
          'Hist.ctr.', and 'Hist.nat.ctr.'.

     '_b_c._d_e_a_t_h_s' a numeric vector, number of breast cancer deaths.

     '_p._y_r' a numeric vector, person-years under study.

_D_e_t_a_i_l_s:

     Four cohorts were collected. The study group consists of the
     population of women in the appropriate age range in Copenhagen and
     Frederiksberg after the introduction of routine mammography
     screening. The national control group consisted of the
     population in the parts of Denmark in which routine mammography
     screening was not available. These two groups were both collected
     in the years 1991-2001.  The historical control group and the
     historical national control group are similar cohorts from 10
     years earlier (1981-1991), before the introduction of screening in
     Copenhagen and Frederiksberg. The study group comprises the entire
     population, not just those accepting the invitation to be
     screened.

_S_o_u_r_c_e:

     A.H. Olsen et al. (2005), Breast cancer mortality in Copenhagen
     after introduction of mammography screening. _British Medical
     Journal_, 330: 220-222.

