cass1                package:twostage                R Documentation

_T_h_e _C_A_S_S _p_i_l_o_t _d_a_t_a_s_e_t _w_i_t_h _s_e_x _a_s _a_u_x_i_l_i_a_r_y _c_o_v_a_r_i_a_t_e

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

     This is a pilot dataset from the Coronary Artery Surgery Study
     (CASS) 
 and is discussed in Reilly (1996). It consists of a
     random sample
 of 25 subjects from each stratum defined by
     different levels of
 mortality and sex. The "first-stage" data
     from which this pilot
 sample was chosen had 8096 observations.
     There are three variables
 in the pilot dataset (see Data
     Description).

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

     The dataset has 100 observations with 3 variables arranged in the
     following columns: 


     Column 1 (Mortality) 
     The operative mortality of the patients 
     (0 = Alive, 1 = Dead) 


     Column 2 (age) 


     Column 3 (sex) 
     (0 = Male, 1 = Female) 

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

     Vliestra, et.al. (1980)

_R_e_f_e_r_e_n_c_e_s:

     Reilly,M. 1996. Optimal sampling strategies for two-stage studies.
     
 Amer. J. Epidemiol. 143:92-100

     Vliestra,R.E.,Frye R.L., Kromnal R.A.,et.al.(1980). Risk factors
     and angiographic
 coronary artery disease: a report from the
     Coronary Artery Surgery Study (CASS).
 Circulation 62:254-61

_S_e_e _A_l_s_o:

     `ms.nprev',`fixed.n',
 `budget',`precision',
 `cass2',`coding'

