

leuk(boot)                                   R Documentation

_S_u_r_v_i_v_a_l _T_i_m_e_s _a_n_d _W_h_i_t_e _B_l_o_o_d _C_o_u_n_t_s _f_o_r _L_e_u_k_a_e_m_i_a _P_a_t_i_e_n_t_s

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

     wbc: White blood cell count.

      ag: Factor describing the patients group according to
          the test described above.  Levels are `present'
          and `absent'.

    time: Survival time in weeks after diagnosis.

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

     The `leuk' data frame has 33 rows and 3 columns.

     Survival times are given for 33 patients who died from
     acute myelogenous leukaemia.  Also measured was the
     patient's white blood cell count at the time of diagno-
     sis.  The patients were also factored into 2 groups
     according to the presence or absence of a morphologic
     characteristic of white blood cells.  Patients termed
     AG positive were identified by the presence of Auer
     rods and/or  significant granulation  of the leukaemic
     cells in the bone marrow at the time of diagnosis.

_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

     Feigl, P. and Zelen, M. (1965) Estimation of exponen-
     tial survival probabilities with concomitant informa-
     tion. Biometrics, 21, 826-838.

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

     Davison, A.C. and Hinkley, D.V. (1997) Bootstrap Meth-
     ods and Their Application. Cambridge University Press.

     Venables, W.N. and Ripley, B.D. (1994) Modern Applied
     Statistics with S-Plus. Springer-Verlag.

