| Famotidine (n = 204) | Placebo (n = 200) | Total (n = 404) | OR (95% CI) | p Value | |
| All lesions | 12 (5.9%) | 66 (33%) | 78 (19.3%) | 0.13 (0.07 to 0.24) | <0.0001 |
| Oesophagitis | 9 (4.4%) | 38 (19%) | 47 (11.6%) | 0.2 (0.09 to 0.4) | <0.0001 |
| Gastric ulcers | 7 (3.4%) | 30 (15%) | 37 (9.2%) | 0.2 (0.09 to 0.4) | = 0.00021 |
| Duodenal ulcers | 1 (0.5%) | 17 (8.5%) | 18 (4.5%) | 0.05 (0.01 to 0.4) | = 0.0045 |
95% CI, 95% confidence intervals; OR, odds ratios.