Table 1.

Types of operation classified as major, intermediate, and minor procedures according to the expected level of postoperative pain

Major	Intermediate	Minor
Gastrectomy	Appendicectomy	Minor urological procedures (transurethral prostatectomy, testicular surgery)
Splenectomy	Laparoscopic procedures	Circumcision
Liver/pancreatic surgery	Mastectomy	Superficial surgery
Oesophageal surgery	Inguinal hernia	Examination under anesthesia/anal fissure/repair/anal stetch
Laparotomy/bowel resection	Vaginal/hysterectomy	Varicose veins
Laparotomy/cholecystectomy	Thyroidectomy
Laparotomy/hysterectomy	Total hip replacement
Haemorrhoidectomy
Thoracic surgery
Spine fusion
Renal surgery
Total knee replacement or arthrolysis
Adenoidectomy