On Jul 13, 2009, at 5:37 AM, anna.bucharova wrote:
Dear all.
I am sort of beginner with R. I do logistic regression with binomial
response variable and several continuous and categorical variables.
In one
categorical variable, zero cell occures (2x2 table looks like
7 - 0
23 - 25
This leads to overestimating of odds ratio and inflated confidence
interval
for odds for given variable. The variable is significant in
univariate test.
I do not necessarilly need odd ratio, but I need the explained
deviance by
this variable and I really want to keep this variable in the model. It
probably matters for explained deviance. How to treat this problem?
Thanks for help, Anna Bucharova
--
You might consider glmrob in package:robustbase. See
http://www.jstatsoft.org/v10/i04
David Winsemius, MD
Heritage Laboratories
West Hartford, CT
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