Infertility after Spontaneous and Induced Abortion
This is a matched case-control study dating from before the availability of conditional logistic regression.
Index of the record.
Age in years of case.
Number of prior induced abortions, grouped into “0”, “1”, or “2 or more”.
0 = control, 1 = case.
Number of prior spontaneous abortions, grouped into “0”, “1”, or “2 or more”.
Matched set number.
One case with two prior spontaneous abortions and two prior induced abortions is omitted.
Trichopoulos et al (1976). Br. J. of Obst. and Gynaec. 83, 645–650.
t = octave.dataset.infert; # TODO: Port glm() (generalized linear model) stuff to Octave