FREQ procedure

The FREQ Procedure ae Frequency Percent Cumulative Frequency Cumulative Percent... 

In this table you can see that clinical success is summarized for each treatment by visit. The key here is by visit. If the data set to be summarized is simply sorted by visit, then PROC FREQ, PROC TABULATE, or some other procedure can be executed with a BY VISIT statement. If the data set were denormalized, then the task of producing the required summary would be more difficult. 

PROC MEANS, PROC SUMMARY, and PROC TABULATE are other SAS procedures that you can use to get descriptive statistics and place them into output data sets. However, those procedures do not offer any descriptive statistical variables that you cannot get from PROC FREQ or PROC UNIVARIATE. 

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