on 16/12/2002 5:07 pm, Wendell Joice at [email protected] wrote:
> After running some logistic regressions, I received two messages on dropped
> variables:
>
> - (variable dropped due to estimability)
>
> - (variable dropped because constant)
Try tabulating these variables against outcome. The one that is a constant
is a constant (same value for everyone). The estimability problem is harder.
How does this variable fare in a univariate model? What is it correlated
with?
Ronan M Conroy ([email protected])
Lecturer in Biostatistics
Royal College of Surgeons
Dublin 2, Ireland
+353 1 402 2431 (fax 2329)
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