VAR variables ;

The VAR statement is used to specify the variables in the input data set that are to be analyzed by the procedure. Only numeric variables can be specified. If the VAR statement is omitted, all numeric variables are analyzed except those that appear in a BY statement, ID statement, INPUT statement, USERDEFINED statement, the USERVAR= option of the REGRESSION statement, or the variable named in the DATE= option in the PROC X12 statement.