Example 7 for PROC CATMOD
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/* S A S S A M P L E L I B R A R Y */
/* */
/* NAME: CATEX7 */
/* TITLE: Example 7 for PROC CATMOD */
/* PRODUCT: STAT */
/* SYSTEM: ALL */
/* KEYS: categorical data analysis */
/* PROCS: CATMOD */
/* DATA: */
/* */
/* SUPPORT: Bob Derr */
/* REF: SAS/STAT User's Guide, PROC CATMOD chapter */
/* MISC: */
/* */
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/*----------------------------------------------------------------
Example 7: Repeated Measures, 4 Response Levels, 1 Population -
Testing Vision: Right Eye vs. Left
----------------------------------
7477 women aged 30-39 were tested for vision in both right and
left eyes. Marginal homogeneity is tested by the main effect
of the repeated measurement factor, SIDE.
From: Grizzle, Starmer and Koch (1969, 493).
----------------------------------------------------------------*/
title 'Vision Symmetry';
data vision;
input Right Left count @@;
datalines;
1 1 1520 1 2 266 1 3 124 1 4 66
2 1 234 2 2 1512 2 3 432 2 4 78
3 1 117 3 2 362 3 3 1772 3 4 205
4 1 36 4 2 82 4 3 179 4 4 492
;
proc catmod data=vision;
weight count;
response marginals;
model Right*Left=_response_ / freq design;
repeated Side 2;
title2 'Test of Marginal Homogeneity';
quit;
