ODS GRAPHICS ON;
PROC GLM DATA=alcohol;
  CLASS Sex;
  MODEL Metabol = Sex*Gastric / SOLUTION;
RUN;
ODS GRAPHICS OFF;

DATA alcohol;
  SET alcohol;
  Male = Sex = "Male";
  Female = Sex = "Female";
  Alcoholic = Alcohol="Alcoholic";
  Nonalc = Alcohol="Non-alcoholic";
  MG = Male*Gastric;
RUN;

ODS GRAPHICS ON;
PROC REG;
  MODEL Metabol = Male Gastric MG / INFLUENCE R;
RUN;
ODS GRAPHICS OFF;