Baseline patient demographics and clinical characteristics stratified by travel distance quintiles from first imputed dataset
| Travel distance quintile | |||||
| 1 | 2 | 3 | 4 | 5 | |
| Distance (miles) | 2.09 (1.35 to 2.75) | 4.42 (3.91 to 5.00) | 7.08 (6.34 to 7.99) | 11.39 (10.11 to 12.74) | 22.42 (18.09 to 32.19) |
| Driving time (minutes) | 13 (9.3 to 17) | 20.45 (17 to 25) | 26.30 (21.98 to 31.13) | 34.10 (29.68 to 40.20) | 52.05 (42.68 to 66.83) |
| Number of patients | 1376 | 1376 | 1376 | 1376 | 1376 |
| Tertiary providers | 37 (97.37%) | 38 (100%) | 36 (94.74%) | 35 (92.11%) | 37 (97.37%) |
| Age mean (SD) | 69.71 (10.81) | 69.96 (10.71) | 69.66 (10.92) | 68.84 (11.01) | 68.58 (10.75) |
| Female sex | 762 (55.38%) | 768 (55.81%) | 729 (52.98%) | 722 (52.47%) | 734 (53.34%) |
| HFRS none | 647 (47.02%) | 620 (45.06%) | 614 (44.62%) | 666 (48.40%) | 676 (49.13%) |
| HFRS mild | 438 (31.83%) | 474 (34.45%) | 485 (35.25%) | 465 (33.79%) | 433 (31.47%) |
| HFRS moderate | 241 (17.51%) | 236 (17.15%) | 243 (17.66%) | 198 (14.39%) | 230 (16.72%) |
| HFRS severe | 50 (3.63%) | 46 (3.34%) | 34 (2.47%) | 47 (3.42%) | 37 (2.69%) |
| Infection present | 314 (22.82%) | 331 (24.06%) | 310 (22.53%) | 334 (24.27%) | 355 (25.80%) |
| Surgeon volume | 7 (3 to 13) | 7 (3 to 13) | 8 (3 to 15) | 8 (3 to 16) | 9 (4 to 17) |
| Hospital volume | 73 (60 to 87) | 74 (60 to 89) | 79 (63 to 97) | 79 (63 to 99) | 85 (68.75 to 112) |
| IMD score | 16.44 (8.73 to 28.67) | 14.30 (7.96 to 24.57) | 14.50 (8.47 to 21.36) | 14.83 (9.23 to 21.74) | 14.752 (8.78 to 21.45) |
| Year 2015/2016 | 104 (7.56%) | 94 (6.83%) | 94 (6.83%) | 89 (6.47%) | 92 (6.69%) |
| Year 2016/2017 | 383 (27.83%) | 354 (25.73%) | 348 (25.29%) | 338 (24.56%) | 353 (25.65%) |
| Year 2017/2018 | 384 (27.91%) | 365 (26.53%) | 339 (24.64%) | 360 (26.16%) | 336 (24.42%) |
| Year 2018/2019 | 269 (19.55%) | 325 (23.62%) | 347 (25.22%) | 354 (25.73%) | 339 (24.64%) |
| Year 2019/2020 | 236 (17.15%) | 238 (17.30%) | 248 (18.02%) | 235 (17.08%) | 256 (18.60%) |
HFRS, Hospital Frailty Risk Score; IMD, Index of Multiple Deprivation.