Clinical characteristics, prevalence of severity, symptom criteria, and colonic transit time in the IBS constipation predominant subgroups
| Parameter | No urge constipation | Urge constipation |
| Number of patients | 17 | 27 |
| Mean (range) age (y) | 49 (22–74) | 46 (22–85) |
| Sex | ||
| Male | 4 | 9 |
| Female | 13 | 18 |
| Symptom severity (%) | ||
| Mild | 13 | 0 |
| Moderate | 50 | 30 |
| Severe1-150 | 0 | 44 |
| Very severe | 37 | 26 |
| Reported number of bowel movements/week (%) | ||
| 2 or less | 55 | 41 |
| 3–4 | 18 | 18 |
| 5 or more | 27 | 41 |
| Using bran, fibre, laxatives, etc. (%) | 92 | 92 |
| Straining (>25% of the time)(%) | 83 | 89 |
| Stool reported hard (%) | 83 | 81 |
| Mean (SEM) colon transit time (hours) | 67 (11) | 60 (11) |
↵1-150 p < 0.03, χ2 5.13, DF 1.