@greenie wrote:
otherrace = (race = 4) and (race = 5) and (race= 6);
If this is really how you coded otherrace, i.e., with ANDs rather than ORs, then this "predictor" is constantly zero. Which I think is what the log means by
Note:
The following parameters have been set to 0, since the variables are a linear combination of other variables as shown
otherrace =
0
(0 as a trivial "linear combination" of zero or more variables).
As @ballardw wrote, you should really use the CLASS statement for the categorical predictors. It was a great improvement of PROC LOGISTIC when this statement was introduced in SAS version 8.
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