Table 1.
Clinical and demographic characteristics by the cohorts of hysterectomy approach
| Unadjusted results | IPTW results | |||||||||
| MIS hysterectomy (n=20 405) | Open hysterectomy (n=14 291) | P value | MIS hysterectomy (n=16 659) | Open hysterectomy (n=16 624) | P value | |||||
| Characteristics | No | % | No | % | No | % | No | % | ||
| NHS year of surgery | ||||||||||
| 2011/2012* | 1127 | 6 | 1671 | 12 | 1305 | 8 | 1306 | 8 | ||
| 2012/2013 | 2471 | 12 | 2829 | 20 | 2566 | 15 | 2561 | 15 | ||
| 2013/2014 | 2971 | 15 | 2614 | 18 | 2677 | 16 | 2676 | 16 | ||
| 2014/2015 | 3387 | 17 | 2361 | 17 | 2772 | 17 | 2782 | 17 | ||
| 2015/2016 | 3500 | 17 | 1948 | 14 | 2635 | 16 | 2623 | 16 | ||
| 2016/2017 | 4060 | 20 | 1852 | 13 | 2846 | 17 | 2848 | 17 | ||
| 2017/2018* | 2889 | 14 | 1016 | 7 | <0.001 | 1858 | 11 | 1828 | 11 | 0.812 |
| Age, years | ||||||||||
| <50 | 1153 | 6 | 1082 | 8 | 1052 | 6 | 1056 | 6 | ||
| 50–59 | 4317 | 21 | 3098 | 22 | 3568 | 21 | 3583 | 22 | ||
| 60–69 | 7111 | 35 | 4672 | 33 | 5683 | 34 | 5664 | 34 | ||
| 70–79 | 5693 | 28 | 3779 | 26 | 4541 | 27 | 4527 | 27 | ||
| 80–89 | 2020 | 10 | 1540 | 11 | 1702 | 10 | 1682 | 10 | ||
| 90> | 111 | 1 | 120 | 1 | <0.001 | 113 | 1 | 111 | 1 | 0.765 |
| Ethnicity | ||||||||||
| White | 16 453 | 81 | 11 117 | 78 | 13 272 | 80 | 13 222 | 80 | ||
| Asian | 649 | 3 | 499 | 3 | 539 | 3 | 544 | 3 | ||
| Black | 251 | 1 | 365 | 3 | 289 | 2 | 285 | 2 | ||
| Other | 3052 | 15 | 2310 | 16 | <0.001 | 2559 | 15 | 2573 | 15 | 0.785 |
| Socioeconomic group (IMD) | ||||||||||
| High | 5149 | 25 | 3291 | 23 | 4194 | 25 | 4201 | 25 | ||
| Intermediate | 5015 | 25 | 3387 | 24 | 4142 | 25 | 4124 | 25 | ||
| Low | 4924 | 24 | 3489 | 24 | 4134 | 25 | 4109 | 25 | ||
| Very low | 4768 | 23 | 3703 | 26 | <0.001 | 4188 | 25 | 4190 | 25 | 0.962 |
| Charlson comorbidity group | ||||||||||
| 0 | 23 | 0 | 13 | 0 | 16 | 0 | 17 | 0 | ||
| 1 | 13 591 | 67 | 8405 | 59 | 10 577 | 63 | 10 550 | 63 | ||
| 2 | 5429 | 27 | 4535 | 32 | 4767 | 29 | 4769 | 29 | ||
| ≥3 | 1362 | 7 | 1338 | 9 | <0.001 | 1299 | 8 | 1288 | 8 | 0.966 |
| Region | ||||||||||
| GLondon | 2848 | 14 | 2184 | 15 | 2419 | 15 | 2421 | 15 | ||
| Yorks | 1771 | 9 | 1220 | 9 | 1488 | 9 | 1512 | 9 | ||
| WestMid | 1901 | 9 | 1672 | 12 | 1734 | 10 | 1739 | 10 | ||
| SouthWest | 2751 | 13 | 1348 | 9 | 1981 | 12 | 1936 | 12 | ||
| SouthEast | 2085 | 10 | 1451 | 10 | 1675 | 10 | 1645 | 10 | ||
| NorthWest | 2909 | 14 | 2550 | 18 | 2624 | 16 | 2624 | 16 | ||
| NorthEast | 1402 | 7 | 432 | 3 | 855 | 5 | 860 | 5 | ||
| Hcounties | 1126 | 6 | 912 | 6 | 968 | 6 | 970 | 6 | ||
| EastMid | 1650 | 8 | 1003 | 7 | 1289 | 8 | 1292 | 8 | ||
| East | 1926 | 9 | 1497 | 10 | 1627 | 10 | 1625 | 10 | ||
| Missing | 36 | 0 | 22 | 0 | <0.001 | – | – | – | – | 0.957 |
| Provider volume | ||||||||||
| High | 12 725 | 62 | 8703 | 61 | 10 445 | 63 | 10 456 | 63 | ||
| Intermedate | 7140 | 35 | 5102 | 36 | 5937 | 36 | 5894 | 35 | ||
| Low | 288 | 1 | 191 | 1 | 232 | 1 | 231 | 1 | ||
| Very low | 36 | 0 | 58 | 0 | 46 | 0 | 43 | 0 | ||
| Missing | 216 | 1 | 237 | 2 | <0.001 | – | – | – | – | 0.712 |
*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.