Risk of relapse of distal ulcerative colitis in the patients receiving three suppositories a week of either 1 g mesalazine or placebo
| Time interval (days) | Mesalazine No (%) | Placebo No (%) | p Value |
| 0–90 | 9/45 (19) | 18/46 (38) | 0.035 |
| 0–180 | 13/45 (29) | 25/46 (54) | 0.017 |
| 0–270 | 17/45 (38) | 28/46 (60) | 0.031 |
| 0–365 | 22/45 (48) | 29/46 (62) | 0.18 |