Table 1

Clinical and demographic characteristics by the cohorts of hysterectomy approach

Unadjusted resultsIPTW results
MIS hysterectomy (n=20 405)Open hysterectomy (n=14 291)P valueMIS hysterectomy (n=16 659)Open hysterectomy (n=16 624)P value
CharacteristicsNo%No%No%No%
NHS year of surgery
 2011/2012*112761671121305813068
 2012/2013247112282920256615256115
 2013/2014297115261418267716267616
 2014/2015338717236117277217278217
 2015/2016350017194814263516262316
 2016/2017406020185213284617284817
 2017/2018*28891410167<0.0011858111828110.812
Age, years
 <5011536108281052610566
 50–59431721309822356821358322
 60–69711135467233568334566434
 70–79569328377926454127452727
 80–89202010154011170210168210
 90>11111201<0.001113111110.765
Ethnicity
 White16 4538111 1177813 2728013 22280
 Asian6493499353935443
 Black2511365328922852
 Other305215231016<0.0012559152573150.785
Socioeconomic group (IMD)
 High514925329123419425420125
 Intermediate501525338724414225412425
 Low492424348924413425410925
 Very low476823370326<0.0014188254190250.962
Charlson comorbidity group
 0230130160170
 113 5916784055910 5776310 55063
 2542927453532476729476929
 ≥31362713389<0.00112998128880.966
Region
 GLondon284814218415241915242115
 Yorks17719122091488915129
 WestMid19019167212173410173910
 SouthWest27511313489198112193612
 SouthEast208510145110167510164510
 NorthWest290914255018262416262416
 NorthEast14027432385558605
 Hcounties11266912696869706
 EastMid16508100371289812928
 East19269149710162710162510
 Missing360220<0.0010.957
Provider volume
 High12 7256287036110 4456310 45663
 Intermedate714035510236593736589435
 Low2881191123212311
 Very low360580460430
 Missing21612372<0.0010.712
  • *NHS year 2011/2012 and 2017/2018 not full year.

  • IMD, Index of Multiple Deprivation; IPTW, inverse probability weighting of treatment; MIS, minimally invasive surgery; NHS, National Health Service.