Table 2: Surgical history.

Surgical historyNumber of patientsPercentage

Appendectomy7223.3
Bowel resections7022.6
 Small bowel237.4
 Small bowel and colon268.4
 Colon216.8
Cholecystectomy3611.7
Exploratory laparotomy3611.7
Anal fistula or abscess309.7
Anal fissure82.6
Haemorrhoids92.9