Based on moderate‐certainty evidence, mechanical bowel preparation plus oral antibiotics are probably more effective than mechanical bowel preparation alone in preventing postoperative complications. A lower incidence of surgical site infections and anastomotic leakage was demonstrated for mechanical bowel preparation plus oral antibiotics.

The review is uncertain about the effect of adjunctive Coriolus on adverse events resulting from conventional chemotherapy for colorectal cancer, including whether any adverse events were due to the chemotherapy or to the extract itself. There was low‐certainty evidence of a small effect on overall survival at five years.

Cochrane review on antibiotics for uncomplicated diverticulitis. The effect of antibiotics for uncomplicated acute diverticulitis is uncertain for complications, emergency surgery, recurrence, elective colonic resections, and long‐term complications. There are three RCTs available, and the quality of the evidence is low.

This Cochrane review assessed the safety, benefits, and harms of different gases (e.g. carbon dioxide, helium, argon, nitrogen, nitrous oxide, and room air) used for establishing pneumoperitoneum in participants undergoing laparoscopic abdominal or gynaecological pelvic surgery.

This Cochrane Review found that MRI seems to be a very accurate test for appendicitis. The DTA review was based on 58 studies that reported on almost 7,500 participants.

Important Cochrane review on diagnosing appendicitis found that the sensitivity and specificity of CT for diagnosing appendicitis in adults are high through a rigorous analysis of 64 studies, including 71 seperate study populations and 10,0280 participants.