PAIRED Statement
 PAIRED PairLists ;
The PairLists in the PAIRED statement identifies
the variables to be compared in paired comparisons.
You can use one or more PairLists.
Variables or lists of variables are separated by
an asterisk (*) or a colon (:). The asterisk requests
comparisons between each variable on the left with
each variable on the right. The colon requests
comparisons between the first variable on the
left and the first on the right, the
second on the left and the second on the right,
and so forth. The number of variables on the
left must equal the number on the right when
the colon is used. The differences
are calculated by taking the variable on the left
minus the variable on the right for both the
asterisk and colon. A pair formed by a variable
with itself is ignored. Use the PAIRED statement
only for paired comparisons. The CLASS and VAR
statements cannot be used with the PAIRED statement.
Examples of the use of the asterisk and the colon
are shown in the following table.
These PAIRED statements...

yield these comparisons

PAIRED A*B;  AB 
PAIRED A*B C*D;  AB and CD 
PAIRED (A B)*(C D);  AC, AD, BC, and BD 
PAIRED (A B)*(C B);  AC, AB, and BC 
PAIRED (A1A2)*(B1B2);  A1B1, A1B2, A2B1, and A2B2 
PAIRED (A1A2):(B1B2);  A1B1 and A2B2 
Copyright © 1999 by SAS Institute Inc., Cary, NC, USA. All rights reserved.