data catheter;
input infection duration count @@;
cards;
1 1 1   1 2 5  1 3 5    1 4 14
2 1 46  2 2 64 2 3 39   2 4 76
;
proc freq; 
 weight count;
 tables infection*duration/chisq cmh1;

proc freq;
  weight count;
  tables infection*duration/cmh1 scores=ridit;

run;