TABLE III

Crude odds ratios for exposure variables (hospital controls)

DrugNo (%) of cases (n=1096)No (%) of controls (n=2184)Unadjusted odds ratio (95% confidence interval)P value
Oral non-steroidal anti-inflammatory drugs:
  45 Day exposure186 (17.0)206 (9.4)1.98 (1.60 to 2.46)<0.001
  Ever exposure457 (41.7)909 (41.6)1.00 (0.86 to 1.17)0.970
Topical non-steroidal anti-inflammatory drugs:
  45 Day exposure23 (2.1)29 (1.3)1.59 (0.92 to 2.74)0.099
  Ever exposure97 (8.9)192 (8.8)1.00 (0.78 to 1.30)0.983
Ulcer healing drugs:
  45 Day exposure242 (22.1)288 (13.2)1.88 (1.55 to 2.28)<0.001
  Ever exposure417 (38.0)569 (26.1)1.75 (1.50 to 2.05)<0.001