topic Re: Help w/ logistic analysis in SAS Procedures

Help w/ logistic analysis

greerham — Wed, 22 Apr 2020 13:37:39 GMT

Hi-I could use some help. I need to preform a statistical analysis to assess the association between type of insurance (categorical) and the outcome of diabetes status at visit 3 (binary variable). The diabetes status of interest is Yes (which are all of the responses).

I wrote my code as... proc logistic data=jhst_proj2final; class PRIVATEPUBLICINSV3; model DIABETESV3(event='Yes')=PRIVATEPUBLICINSV3; run;

But I keep getting this error message "ERROR: All observations have the same response. No statistics are computed."

I am trying to figure out if the analysis I selected is wrong or if the code is wrong.

Re: Help w/ logistic analysis

ballardw — Wed, 22 Apr 2020 14:36:06 GMT

Try running this code:

Proc freq data=jhst_proj2final;

tables PRIVATEPUBLICINSV3*DIABETESV3 / list missing;

run;

That will show all of the combinations of your, I assume, insurance variable with the diabetes variable. If all of the diabetes are "yes" then that is the issue. Likely you need to go back to what created the diabetes variable and see why all the values are "yes".

Another possibility would be that the insurance is missing for all of the "No" diabetes responses.

Re: Help w/ logistic analysis

greerham — Wed, 22 Apr 2020 14:52:17 GMT

I figured it out, thank you!

Re: Help w/ logistic analysis

ballardw — Wed, 22 Apr 2020 14:58:25 GMT

@greerham wrote:

I figured it out, thank you!

Please describe what you figured out.

That way when someone finds a link to this thread in an internet search later with a similar problem they will have at least one possible solution to their problem.