                               Program to compute the odds ration                              1
                                                                 22:56 Tuesday, February 8, 2000

                                       The FREQ Procedure

                                  Table of EXPOSURE by OUTCOME

                              EXPOSURE     OUTCOME

                              FrequencyВ
                              Percent  В
                              Row Pct  В
                              Col Pct  ВCASE    ВCONTROL В  Total
                              ГГГГГГГГГИГГГГГГГГИГГГГГГГГИ
                              1-YES    В     93 В      6 В     99
                                       В  20.53 В   1.32 В  21.85
                                       В  93.94 В   6.06 В
                                       В  34.83 В   3.23 В
                              ГГГГГГГГГИГГГГГГГГИГГГГГГГГИ
                              2-NO     В    174 В    180 В    354
                                       В  38.41 В  39.74 В  78.15
                                       В  49.15 В  50.85 В
                                       В  65.17 В  96.77 В
                              ГГГГГГГГГИГГГГГГГГИГГГГГГГГИ
                              Total         267      186      453
                                          58.94    41.06   100.00


                          Statistics for Table of EXPOSURE by OUTCOME

                   Statistic                     DF       Value          Prob
                   ----------------------------------------------------------
                   Chi-Square                     1     64.1230        <.0001
                   Likelihood Ratio Chi-Square    1     77.5141        <.0001
                   Continuity Adj. Chi-Square     1     62.2857        <.0001
                   Mantel-Haenszel Chi-Square     1     63.9814        <.0001
                   Fisher's Exact Test (Left)                          1.0000
                                       (Right)                      2.891E-18
                                       (2-Tail)                     3.476E-18
                   Phi Coefficient                       0.3762
                   Contingency Coefficient               0.3521
                   Cramer's V                            0.3762

                                       Sample Size = 453
                               Program to compute the odds ration                              2
                                                                 22:56 Tuesday, February 8, 2000

                                       The FREQ Procedure

                           Summary Statistics for EXPOSURE by OUTCOME

                  Cochran-Mantel-Haenszel Statistics (Based on Table Scores)

                Statistic    Alternative Hypothesis    DF       Value      Prob
                ---------------------------------------------------------------
                    1        Nonzero Correlation        1     63.9814    <.0001
                    2        Row Mean Scores Differ     1     63.9814    <.0001
                    3        General Association        1     63.9814    <.0001


                       Estimates of the Common Relative Risk (Row1/Row2)

           Type of Study     Method                  Value     95% Confidence Bounds
           -------------------------------------------------------------------------
           Case-Control      Mantel-Haenszel       16.0345       6.8434      37.5695
             (Odds Ratio)    Logit                 16.0345       6.8434      37.5695

           Cohort            Mantel-Haenszel        1.9112       1.6999       2.1488
             (Col1 Risk)     Logit                  1.9112       1.6999       2.1488

           Cohort            Mantel-Haenszel        0.1192       0.0545       0.2606
             (Col2 Risk)     Logit                  0.1192       0.0545       0.2606


                                    Total Sample Size = 453