rats                package:survival                R Documentation

_R_a_t _d_a_t_a _f_r_o_m _s_u_r_v_i_v_a_l_5

_D_e_s_c_r_i_p_t_i_o_n:

     48 rats were injected with a carcinogen, and then randomized to
     either drug or placebo.  The number of tumors ranges from 0 to 13;
     all rats were  censored at 6 months after randomization.

_U_s_a_g_e:

     data(rats)

_F_o_r_m_a_t:


       rat:          id
       rx:           treatment,(1=drug, 0=control)
       observation:  within rat
       start:        entry time
       stop:         exit time
       status:       event status

_S_o_u_r_c_e:

     Gail, Sautner and Brown, Biometrics 36, 255-66, 1980

