[Perception of pain during sigmoidoscopy flexible as an additional diagnostic method for irritable bowel syndrome].

Introduction: Visceral hypersensitivity has been proposed as a biological marker of Irritable bowel syndrome (IBS).

Objective: To evaluate the pain perception during sigmoidoscopy using a visual analog scale of pain in patients with or without IBS, and to assess the pain perception as diagnostic criteria for IBS. We further assessed the sensitivity, specificity and diagnostic efficiency of pain scores to diagnose IBS.