The CASECONTROL Procedure
VAR variables ;
The VAR statement identifies the variables containing either the marker alleles or, if GENOCOL is specified, the marker genotypes. The following number of variables should be specified in this statement for a data set
containing 
markers according to whether the options GENOCOL and TALL are used:
-
When both GENOCOL and TALL are specified, there should be 1 variable named containing marker genotypes.
-
When only TALL is specified, there should be 2 variables named containing marker alleles.
-
When only GENOCOL is specified, there should be
variables named, one for each marker containing marker genotypes.
-
When neither option is specified, there should be 2
variables named, two for each marker containing marker alleles.
All variables specified must be of the same type, either character or numeric.