## Example 17 for PROC LOGISTIC

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/*          S A S   S A M P L E   L I B R A R Y                 */
/*                                                              */
/*    NAME: LOGIEX17                                            */
/*   TITLE: Example 17 for PROC LOGISTIC                        */
/* PRODUCT: STAT                                                */
/*  SYSTEM: ALL                                                 */
/*    KEYS: logistic regression analysis,                       */
/*          binomial response data,                             */
/*   PROCS: LOGISTIC                                            */
/*    DATA:                                                     */
/*                                                              */
/* SUPPORT: Bob Derr                                            */
/*     REF: SAS/STAT User's Guide, PROC LOGISTIC chapter        */
/*    MISC:                                                     */
/*                                                              */
/****************************************************************/

/*****************************************************************
Example 17. Using the LSMEANS Statement
*****************************************************************/

/*
The NEURALGIA data set is used to demonstrate the LSMEANS statement.

A model including an interaction between TREATMENT and SEX is fit.

The ODDSRATIO statement produces odds ratios contrasting pairs of
levels of TREATMENT at each level of SEX, and a brief discussion of
the odds ratio computation is provided.

The LSMEANS statement first displays the LS-means.  The DIFF option
takes differences of the TREATMENT LS-means, the ODDSRATIO option
computes odds ratios of these differences, and the CL option produces
confidence limits for the LS-means and the odds ratios.  In contrast
to the results from the ODDSRATIO statement, there is only one LS-means
odds ratio computed for comparing each pair of TREATMENT levels.
The ADJUST=BON option is specified to adjust the p-values and
confidence intervals for multiplicity.
*/

title 'Example 17. Using the LSMEANS Statement';

Data Neuralgia;
input Treatment \$ Sex \$ Age Duration Pain \$ @@;
datalines;
P  F  68   1  No   B  M  74  16  No  P  F  67  30  No
P  M  66  26  Yes  B  F  67  28  No  B  F  77  16  No
A  F  71  12  No   B  F  72  50  No  B  F  76   9  Yes
A  M  71  17  Yes  A  F  63  27  No  A  F  69  18  Yes
B  F  66  12  No   A  M  62  42  No  P  F  64   1  Yes
A  F  64  17  No   P  M  74   4  No  A  F  72  25  No
P  M  70   1  Yes  B  M  66  19  No  B  M  59  29  No
A  F  64  30  No   A  M  70  28  No  A  M  69   1  No
B  F  78   1  No   P  M  83   1  Yes B  F  69  42  No
B  M  75  30  Yes  P  M  77  29  Yes P  F  79  20  Yes
A  M  70  12  No   A  F  69  12  No  B  F  65  14  No
B  M  70   1  No   B  M  67  23  No  A  M  76  25  Yes
P  M  78  12  Yes  B  M  77   1  Yes B  F  69  24  No
P  M  66   4  Yes  P  F  65  29  No  P  M  60  26  Yes
A  M  78  15  Yes  B  M  75  21  Yes A  F  67  11  No
P  F  72  27  No   P  F  70  13  Yes A  M  75   6  Yes
B  F  65   7  No   P  F  68  27  Yes P  M  68  11  Yes
P  M  67  17  Yes  B  M  70  22  No  A  M  65  15  No
P  F  67   1  Yes  A  M  67  10  No  P  F  72  11  Yes
A  F  74   1  No   B  M  80  21  Yes A  F  69   3  No
;

proc logistic data=Neuralgia;
class Treatment Sex / param=glm;
model Pain= Treatment|Sex Age;
oddsratio Treatment;
lsmeans Treatment / e diff oddsratio cl adjust=bon;
run;

proc logistic data=Neuralgia;
class Treatment Sex / param=glm;
model Pain= Treatment|Sex Age;
lsmestimate treatment 1 0 -1, 0 1 -1 / joint;
run;

proc logistic data=Neuralgia;
class Treatment Sex / param=glm;
model Pain= Treatment|Sex Age;
slice Treatment*Sex / sliceby=Sex diff oddsratio cl adjust=bon;
run;

```