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Documentation Example 8 for PROC GLIMMIX

/****************************************************************/
/*          S A S   S A M P L E   L I B R A R Y                 */
/*                                                              */
/*    NAME: gmxex08                                             */
/*   TITLE: Documentation Example 8 for PROC GLIMMIX            */
/*          Adjusted Covariance Matrices of Fixed Effects       */
/* PRODUCT: STAT                                                */
/*  SYSTEM: ALL                                                 */
/*    KEYS: Generalized linear mixed models                     */
/*          Diagnosing adjusted covariance matrices             */
/*          Kenward-Roger standard error adjustment             */
/*   PROCS: GLIMMIX                                             */
/*    DATA:                                                     */
/*                                                              */
/* SUPPORT: Oliver Schabenberger                                */
/*     REF:                                                     */
/*    MISC:                                                     */
/****************************************************************/

data pr;
  input child gender$ y1 y2 y3 y4;
  array yy y1-y4;
  do time=1 to 4;
     age = time*2 + 6;
     y   = yy{time};
     output;
  end;
  drop y1-y4;
  datalines;
 1   F   21.0    20.0    21.5    23.0
 2   F   21.0    21.5    24.0    25.5
 3   F   20.5    24.0    24.5    26.0
 4   F   23.5    24.5    25.0    26.5
 5   F   21.5    23.0    22.5    23.5
 6   F   20.0    21.0    21.0    22.5
 7   F   21.5    22.5    23.0    25.0
 8   F   23.0    23.0    23.5    24.0
 9   F   20.0    21.0    22.0    21.5
10   F   16.5    19.0    19.0    19.5
11   F   24.5    25.0    28.0    28.0
12   M   26.0    25.0    29.0    31.0
13   M   21.5    22.5    23.0    26.5
14   M   23.0    22.5    24.0    27.5
15   M   25.5    27.5    26.5    27.0
16   M   20.0    23.5    22.5    26.0
17   M   24.5    25.5    27.0    28.5
18   M   22.0    22.0    24.5    26.5
19   M   24.0    21.5    24.5    25.5
20   M   23.0    20.5    31.0    26.0
21   M   27.5    28.0    31.0    31.5
22   M   23.0    23.0    23.5    25.0
23   M   21.5    23.5    24.0    28.0
24   M   17.0    24.5    26.0    29.5
25   M   22.5    25.5    25.5    26.0
26   M   23.0    24.5    26.0    30.0
27   M   22.0    21.5    23.5    25.0
;

proc glimmix data=pr;
   class child gender time;
   model y = gender age gender*age / covb(details) ddfm=kr;
   random intercept age / type=chol sub=child;
   random time / subject=child type=ar(1) residual;
   ods select ModelInfo CovB CovBModelBased CovBDetails;
run;

proc glimmix data=pr;
   class child gender time;
   model y = gender age gender*age / covb(details)
                                     ddfm=kr(firstorder);
   random intercept age / type=chol sub=child;
   random time / subject=child type=ar(1) residual;
   ods select ModelInfo CovB CovBDetails;
run;