Patient characteristics at entry (where applicable, results are expressed as means (SD))
| Mesalazine | Placebo | p Value | |
| Number of patients | 48 | 47 | |
| Percentage men | 52.1 | 40.4 | 0.26 |
| Age (years) | 41.5 (13.5) | 41.2 (11.8) | 0.89 |
| No of episodes in the last year | 2.6 (1.5) | 3.1 (2.1) | 0.35 |
| Duration of the last episode (days) | 77 (68) | 57 (63) | 0.039 |
| Oral treatment (% subjects) | 56.3 | 53.2 | 0.77 |
| No of stools/day | 1.8 (1.6) | 1.6 (1.0) | 0.97 |
| Blood in stools (% subjects) | 0 | 0 | |
| Mucus (% subjects) | 10.4 | 4.3 | 0.44 |
| Tenesmus (% subjects) | 16.7 | 10.6 | 0.43 |
| Pain (% subjects) | 25.0 | 21.2 | 0.65 |
| Endoscopy score 0 (% subjects1-150) | 50.0 | 44.7 | 0.60 |
| Extent of lesions (cm) | 9.6 (6.8) | 7.6 (6.0) | 0.18 |
↵1-150 Score = 1 in the others.