topic Exact RISKDIFF in proc freq in Statistical Procedures

Exact RISKDIFF in proc freq

Jagadishkatam — Mon, 10 Sep 2018 08:53:04 GMT

when i run the below code i get the

WARNING: Computing exact confidence limits for this problem may require much time and memory. Press the system interrupt key to terminate exact computations.

could you please suggest how to overcome this warning.

        proc freq data=example ;
               tables trt*cat/ riskdiff nocol norow nopct  ;
               exact riskdiff (method=score);
        run;

Re: Exact RISKDIFF in proc freq

Rick_SAS — Mon, 10 Sep 2018 12:02:43 GMT

The warning appears to let you know that exact tests can be time consuming for large tables. Instead of an exact test, you can use a Monte Carlo approximation to the exact test by using the MC option. For an example and discussion, see the article "Monte Carlo simulation for contingency tables in SAS."