The SURVEYMEANS Procedure
If you use a CLASS statement to name classification variables for categorical analysis, or if you list any character variables in the VAR statement, then PROC SURVEYMEANS displays a “Class Level Information” table. This table contains the following information for each classification variable:
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Class Variable, which lists each CLASS variable name
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Levels, which is the number of values or levels of the classification variable
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Values, which lists the values of the classification variable. The values are separated by a white space character; therefore, to avoid confusion, you should not include a white space character within a classification variable value.