topic Re: How to flag used observations in regression model? in SAS Procedures

How to flag used observations in regression model?

sjmoussa — Sun, 09 Aug 2009 16:03:11 GMT

When I perform a logistic regression model using about 50 predictor variables my sample size decreases from n=18500 to n=7468 due to missing data on some of the variables. I want to create a new dataset that only includes the complete cases (n=7468). Is there an easy way to do this in SAS?

Re: How to flag used observations in regression model?

Peter_C — Mon, 10 Aug 2009 14:07:14 GMT

if these predictor variables are
1 : all numeric
and
2 : listed in macro variable &predictors
data new_dataset ;
set old_dataset ;
if nmiss( of &predictors ) > 0 then delete ;
run ;

Re: How to flag used observations in regression model?

Doc_Duke — Mon, 10 Aug 2009 15:52:29 GMT

You could output a dataset that includes the predicted risk and then subset on that value being non-missing.