ectopic              package:meanscore              R Documentation

_T_h_e _E_c_t_o_p_i_c _P_r_e_g_n_a_n_c_y _D_a_t_a_s_e_t

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

     This dataset, which was analysed in Table 3 of Reilly and Pepe
     (1995) is from a case-control study of the association between
     ectopic pregnancy and sexually transmitted diseases(STDs).  The
     total sample size is 979, 264 cases and 715 controls. The 
     variables collected from the beginning of the study included
     gonnorhoea, contraceptive use and sexual partners (see *Format*).

     One year after the study began, the investigators started
     collecting serum samples for determining chlamydia antibody status
     in all cases and in a 50 percent subsample of controls.  As a
     result, only 327 out of the 979 patients have measurements  for
     chlamydia antibody.

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

     data(ectopic)

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

     The dataset has 979 observations with 5 variables arranged in the
     following columns: 

     Column 1 (Pregnancy) 
      The ectopic pregnancy status of patients at the time of interview 
      (0 = No, 1 = Yes) 

     Column 2 (Chlamydia) 
      The chlamydia antibody status of patients (0 = No, 1 = Yes). 
      There are some observations with missing values, indicating that
     at the time these patients were enrolled, the investigators had
     not yet started to record chlamydia antibody status.

     Column 3 (Gonnorhoea) 
      (0 = No, 1 = Yes) 

     Column 4 (Contracept) 
      The use of contraceptives 
       (0 = No, 1 = Yes) 

     Column 5 (Sexpatr) 
      Multiple sex partners (0 = No, 1 = Yes) 

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

     Sherman,_et.al._(1990)

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

     Reilly,M and M.S. Pepe. 1995. A mean score method for  missing and
     auxiliary covariate data in  regression models. _Biometrika_
     *82*:299-314 
      Sherman, K.J., _et.al._ .1990. Sexually transmitted diseases and
     tubal pregnancy. _Sex. Transm.Dis._ *7*: 115-21

