Cochrane Review Group
Colorectal
57 systematic reviews in Colorectal ask 759 questions. 12% have no studies to answer them, 27.5% rest on very low certainty evidence and 28.7% reach moderate or high certainty.
Reviews
57
Questions
759
current versions
No studies
12%
Moderate or high
28.7%
No studies 91 · 12%Ungraded 12 · 1.6%Very low 209 · 27.5%Low 229 · 30.2%Moderate 160 · 21.1%High 58 · 7.6%
Ungraded means an effect was reported without a GRADE rating; it is not a gap. No studies means the review found nothing to answer the question. The six categories are a display order, not a score.
Thinnest evidence
All no studies and very low questions| Question | Effect | Evidence | Status / GRADE |
|---|---|---|---|
Preoperative parenteral nutrition vs usual care or control Non‐infectious complications · people undergoing gastrointestinal surgery Preoperative nutrition therapy in people undergoing gastrointestinal surgery (2024) · Cochrane | RR 0.61 [0.36, 1.02] | 3 studies · 260 participants | Very low |
Oral nutritional supplements vs usual care or control Infectious complications recorded up to 30 days postdischarge · people undergoing gastrointestinal surgery Preoperative nutrition therapy in people undergoing gastrointestinal surgery (2024) · Cochrane | RR 0.88 [0.6, 1.27] | 5 studies · 473 participants | Very low |
Preoperative parenteral nutrition vs usual care or control Infectious complications · people undergoing gastrointestinal surgery Preoperative nutrition therapy in people undergoing gastrointestinal surgery (2024) · Cochrane | RR 0.98 [0.53, 1.8] | 3 studies · 260 participants | Very low |
Preoperative parenteral nutrition vs usual care or control Length of hospital stay (days) · people undergoing gastrointestinal surgery Preoperative nutrition therapy in people undergoing gastrointestinal surgery (2024) · Cochrane | no estimate extracted | 2 studies · 135 participants | Very low |
Preoperative enteral nutrition (standard formula) vs usual care or control Non‐infectious complications · people undergoing gastrointestinal surgery Preoperative nutrition therapy in people undergoing gastrointestinal surgery (2024) · Cochrane | no estimate extracted | NR | No studies |
Preoperative enteral nutrition (standard formula) vs usual care or control Infectious complications · people undergoing gastrointestinal surgery Preoperative nutrition therapy in people undergoing gastrointestinal surgery (2024) · Cochrane | RR 0.9 [0.59, 1.38] | 2 studies · 126 participants | Very low |
Preoperative enteral nutrition (standard formula) vs usual care or control Length of hospital stay (days) · people undergoing gastrointestinal surgery Preoperative nutrition therapy in people undergoing gastrointestinal surgery (2024) · Cochrane | no estimate extracted | 2 studies · 126 participants | Very low |
Early vs delayed open or laparoscopic appendicectomy Overall morbidity Median · paediatric and adult participants with appendiceal phlegmon Early versus delayed appendicectomy for appendiceal phlegmon or abscess (2024) · Cochrane | RR 0.74 [0.19, 2.86] | 3 studies · 146 participants | Very low |
Early vs delayed laparoscopic appendicectomy Abdominal abscess · paediatric participants with appendiceal abscess Early versus delayed appendicectomy for appendiceal phlegmon or abscess (2024) · Cochrane | no estimate extracted | NR | No studies |
Early vs delayed laparoscopic appendicectomy Faecal fistula · paediatric participants with appendiceal abscess Early versus delayed appendicectomy for appendiceal phlegmon or abscess (2024) · Cochrane | no estimate extracted | NR | No studies |
Early vs delayed laparoscopic appendicectomy Mortality · paediatric participants with appendiceal abscess Early versus delayed appendicectomy for appendiceal phlegmon or abscess (2024) · Cochrane | no estimate extracted | 1 study · 40 participants | Very low |
Early vs delayed laparoscopic appendicectomy Total length of hospital stay (days) · paediatric participants with appendiceal abscess Early versus delayed appendicectomy for appendiceal phlegmon or abscess (2024) · Cochrane | no estimate extracted | 1 study · 40 participants | Very low |
Reviews 57
Preoperative nutrition therapy in people undergoing gastrointestinal surgery
CochraneSoF table
16 questions
Early versus delayed appendicectomy for appendiceal phlegmon or abscess
CochraneSoF table
14 questions
Purse‐string skin closure versus linear skin closure in people undergoing stoma reversal
CochraneSoF table
4 questions
Uncut Roux‐en‐Y reconstruction after distal gastrectomy for gastric cancer
CochraneSoF table
14 questions
Appendectomy versus antibiotic treatment for acute appendicitis
CochraneSoF table
7 questions
Local versus radical surgery for early rectal cancer with or without neoadjuvant or adjuvant therapy
CochraneSoF table
8 questions
Fibrin sealants for the prevention of postoperative pancreatic fistula following pancreatic surgery
CochraneSoF table
22 questions
Prehabilitation versus no prehabilitation to improve functional capacity, reduce postoperative complications and improve quality of life in colorectal cancer surgery
CochraneSoF table
8 questions
Preoperative combined mechanical and oral antibiotic bowel preparation for preventing complications in elective colorectal surgery
CochraneSoF table
15 questions
Mesh versus non‐mesh for emergency groin hernia repair
CochraneSoF table
7 questions
Antibiotics for uncomplicated diverticulitis
CochraneSoF table
21 questions
Gases for establishing pneumoperitoneum during laparoscopic abdominal surgery
CochraneSoF table
24 questions
Coriolus (Trametes) versicolor mushroom to reduce adverse effects from chemotherapy or radiotherapy in people with colorectal cancer
CochraneSoF table
7 questions
Abdominal drainage to prevent intra‐peritoneal abscess after appendectomy for complicated appendicitis
CochraneSoF table
8 questions
Imaging modalities for the detection of posterior pelvic floor disorders in women with obstructed defaecation syndrome
CochraneSoF table
18 questions
Mesh fixation techniques in primary ventral or incisional hernia repair
CochraneSoF table
56 questions
Antibiotic prophylaxis for prevention of postoperative wound infection in adults undergoing open elective inguinal or femoral hernia repair
CochraneSoF table
12 questions
Physical activity interventions for disease‐related physical and mental health during and following treatment in people with non‐advanced colorectal cancer
CochraneSoF table
9 questions
Follow‐up strategies for patients treated for non‐metastatic colorectal cancer
CochraneSoF table
6 questions
Early enteral nutrition within 24 hours of lower gastrointestinal surgery versus later commencement for length of hospital stay and postoperative complications
CochraneSoF table
17 questions
Prolonged thromboprophylaxis with low molecular weight heparin for abdominal or pelvic surgery
CochraneSoF table
10 questions
Lateral pararectal versus transrectal stoma placement for prevention of parastomal herniation
CochraneSoF table
5 questions
Laparoscopic versus open surgery for suspected appendicitis
CochraneSoF table
24 questions
Preoperative radiotherapy and curative surgery for the management of localised rectal carcinoma
CochraneSoF table
9 questions
Virtual reality simulation training for health professions trainees in gastrointestinal endoscopy
CochraneSoF table
14 questions