topic Re: ODS Output CovB in Statistical Procedures

ODS Output CovB

Recep — Fri, 12 May 2017 18:40:58 GMT

Hello there;

I'm trying to obtain the "estimated covariance matrix of parameter estimators" by using PROC LOGISTIC:

proc logistic data=datain descending;
class chop;
model complication = age severity body_region mechanism transfer gcs sbp rr chop;
by _imputation_;
ods output ParameterEstimates = logitparms CovB = logitcovb;
run;

Even though CovB is an ODS table option according to the SAS documentation (https://support.sas.com/documentation/cdl/en/statug/63033/HTML/default/viewer.htm#statug_logistic_sect049.htm) I'm having a warning saying that:

"WARNING: Output 'CovB' was not created. Make sure that the output object name, label, or path is spelled correctly. Also, verify that the appropriate procedure options are used to produce the requested output object. For example, verify that the NOPRINT option is not used."

No problem for the ParameterEstimates.

Any ideas?

Thanks a lot in advance!

Recep

Re: ODS Output CovB

ballardw — Fri, 12 May 2017 19:11:43 GMT

Does this fix the problem:

model complication = age severity body_region mechanism transfer gcs sbp rr chop/ covb;
ods output ParameterEstimates = logitparms;
ods output CovB = logitcovb;

Re: ODS Output CovB

Recep — Fri, 12 May 2017 19:15:02 GMT

I tried that. Unfortunately I still get the same warning...

Re: ODS Output CovB

Recep — Fri, 12 May 2017 19:17:29 GMT

Nevermind! I did not pay attention to the CovB option in the MODEL statement. It seems like it worked. I'll check the results. Thanks a lot!