data aspirin;
input group mi count @@;
cards;
1 1 189  1 2 10845
2 1 104  2 2 10933
;
proc freq order=data; weight count;
  table group*mi /  expected measures;
  exact  or;
  run;
------------------------------------------------  
 The SAS System           12:40 Friday, May 4, 2001   5

                        The FREQ Procedure
                       Table of group by mi

               group     mi

               Frequency|
               Expected |
               Percent  |
               Row Pct  |
               Col Pct  |       1|       2|  Total
               ---------+--------+--------+
                      1 |    189 |  10845 |  11034
                        | 146.48 |  10888 |
                        |   0.86 |  49.14 |  49.99
                        |   1.71 |  98.29 |
                        |  64.51 |  49.80 |
               ---------+--------+--------+
                      2 |    104 |  10933 |  11037
                        | 146.52 |  10890 |
                        |   0.47 |  49.54 |  50.01
                        |   0.94 |  99.06 |
                        |  35.49 |  50.20 |
               ---------+--------+--------+
               Total         293    21778    22071
                            1.33    98.67   100.00


               Statistics for Table of group by mi

           Estimates of the Relative Risk (Row1/Row2)

Type of Study                   Value    95% Confidence Limits
--------------------------------------------------------------
Case-Control (Odds Ratio)      1.8321     1.4400    2.3308
Cohort (Col1 Risk)             1.8178     1.4330    2.3059
Cohort (Col2 Risk)             0.9922     0.9892    0.9953


                 Odds Ratio (Case-Control Study)
               -----------------------------------
               Odds Ratio                   1.8321

               Asymptotic Conf Limits
               95% Lower Conf Limit         1.4400
               95% Upper Conf Limit         2.3308

               Exact Conf Limits
               95% Lower Conf Limit         1.4323
               95% Upper Conf Limit         2.3539

                       Sample Size = 22071