

   IInnffeerrttiilliittyy aafftteerr ssppoonnttaanneeoouuss aanndd iinndduucceedd aabboorrttiioonn

        data(infert)

   FFoorrmmaatt::

         1.     Education              0 = 0-5  years
                                       1 = 6-11 years
                                       2 = 12+  years
         2.     age                    age in years of case
         3.     parity                 count
         4.     number of prior        0 = 0
                                       induced abortions 1 = 1
                                       2 = 2 or more
         5.     case status            1 = case
                                       0 = control
         6.     number of prior        0 = 0
                                       spontaneous abortions 1 = 1
                                       2 = 2 or more
         7.     matched set number     1-83
         8.     stratum number         1-63

   DDeessccrriippttiioonn::

        This is a matched case-control study dating from before
        the availability of conditional logistic regression.

   NNoottee::

        One case with two prior spontaneous abortions and two
        prior induced abortions is omitted.

   SSoouurrccee::

        Trichopoulos et al. (1976) Br. J. of Obst. and Gynaec.
        vol.83, pp. 645-650.

