Table 1

A list of operations passing both criteria for inclusion in this study

Operation codes (OPCS-4)Specific operation typeGeneric operation type
F091Surgical removal of impacted wisdom toothWisdom tooth
F093Surgical removal of wisdom tooth NEC
J183Total cholecystectomy NECCholecystectomy
M653Endoscopic resection of prostate NECProstate resection
Q074Total abdominal hysterectomy NECHysterectomy
T212Repair of recurrent inguinal hernia using insert of prosthetic materialInguinal hernia (IH) repair
T242Repair of umbilical hernia using insert of prosthetic materialUmbilical hernia (UH) repair
T243Repair of umbilical hernia using sutures
T272Repair of ventral hernia using insert of prosthetic materialVentral hernia (VH) repair
V255Primary posterior decompression of lumbar spinal cord NECLumbar decompression
W371Primary total prosthetic replacement of hip joint using cementTotal hip replacement (THR)
W381Primary total prosthetic replacement of hip joint not using cement
W391Primary total prosthetic replacement of hip joint NEC
W931Primary hybrid prosthetic replacement of hip joint using cemented acetabular component
W941Primary hybrid prosthetic replacement of hip joint using cemented femoral component
W401Primary total prosthetic replacement of knee joint using cementTotal knee replacement (TKR)
W411Primary total prosthetic replacement of knee joint not using cement
W421Primary total prosthetic replacement of knee joint NEC
  • Frequency of these operation types is specified in table 2.

  • NEC, not elsewhere classified; ;OPCS-4, OPCS Classification of Interventions and Procedures version 4.