jose Bartolomei wrote:
Dear S users,
I am conducting a logistic regression (lrm) using the Design library.
I have a categorical dependent variable and I will like to change de
reference value in the model.
There is no need to change the reference value when fitting the model.
All estimates should come from summary( ), contrast( ), predict( ), and
for those it is very easy to use any category of your choice as the
reference value. summary( ) defaults to the modal category but do
?summary.Design to see how to use others quite easily.
Frank Harrell
In addition I will like to exclude one of the categories included in the
dependent variable.
Which are the commands within the lrm model for that?
Thanks,
Jose
--
Frank E Harrell Jr Professor and Chair School of Medicine
Department of Biostatistics Vanderbilt University
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