out =
infert ()
¶Infertility after Spontaneous and Induced Abortion
This is a matched case-control study dating from before the availability of conditional logistic regression.
education
Index of the record.
age
Age in years of case.
parity
Count.
induced
Number of prior induced abortions, grouped into “0”, “1”, or “2 or more”.
case_status
0 = control, 1 = case.
spontaneous
Number of prior spontaneous abortions, grouped into “0”, “1”, or “2 or more”.
stratum
Matched set number.
pooled_stratum
Stratum 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 = tblish.dataset.infert; # TODO: Port glm() (generalized linear model) stuff to Octave