frei                package:lbdatasets                 R Documentation

_A_c_u_t_e _L_e_u_k_e_m_i_a _d_a_t_a _f_r_o_m _F_r_e_i_r_e_i_c_h _e_t _a_l (_1_9_6_3).

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

     In this study there were 21 pairs of subjects, and within each
     pair one subject received 6-mercaptopurine (6-MP) and one got
     placebo. The data are right censored.

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

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

     A data frame with 42 observations on the following variables.

     ‘time’ time in remission (in weeks)

     ‘status’ event status, 1 is relapse, 0 is censored

     ‘treatment’ treatment group: either 'placebo' or '6-MP'

     ‘pair’ pair id number

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

     See also Gehan (1965) who used the data ignoring the pairing so
     that he could illustrate his famous two-sample (non-paired) rank
     test.

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

     bpcp package

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

     Gehan (1965) Biometrika 52:203-223. Freireich et al (1963) Blood
     21(6):699-716.

_E_x_a_m_p_l_e_s:

     head(frei)
     


