Number of patients operated on, surgeons and anaesthetists in each centre during the study period.
| Centre no | Patients | Surgeons | Anaesthetists | LOS median (IQR) | LOS mean (SD) | Logistic EuroSCORE |
| 1 | 17 889 | 21 | 24 | 8 (6–11) | 10.06 (7.14) | 7.52 (9.74)% |
| 2 | 9323 | 13 | 16 | 8 (6–12) | 10.96 (9.13) | 8.92 (11.26)% |
| 3 | 6357 | 6 | 8 | 7 (6–10) | 9.69 (8.59) | 7.62 (9.03)% |
| 4 | 15 008 | 16 | 24 | 7 (6–10) | 9.47 (7.47) | 5.77 (7.26)% |
| 5 | 6661 | 10 | 15 | 7 (6–11) | 10.08 (8.79) | 6.13 (7.96)% |
| 6* | 9637 | 10 | 17 | 7 (6–9) | 9.03 (7.76) | 4.29 (3.18)% |
| 7 | 7537 | 13 | 17 | 8 (6–13) | 11.41 (9.86) | 7.48 (10.61)% |
| 8 | 7238 | 11 | 13 | 7 (6–11) | 10.75 (9.08) | 6.71 (9.90)% |
| 9 | 16 506 | 17 | 22 | 7 (6–11) | 10.15 (8.47) | 7.47 (9.58)% |
| 10 | 10 882 | 10 | 34 | 8 (8–12) | 10.95 (8.75) | 6.91 (7.84)% |
Surgeons and anaesthetists who looked after <10 patients were excluded. Values are frequency or mean (SD) unless specified as median (IQR)
*Additive EuroSCORE was provided by this centre.
LOS, length of stay.