Checklist characteristics (N=6313)
| Number (%) | |
| Hospital | |
| Academic Medical Centre, Amsterdam | 1036 (16.4) |
| Amphia Hospital, Breda | 913 (14.5) |
| Jeroen Bosch Hospital, Den Bosch | 918 (14.5) |
| Maastricht University Medical Centre, Maastricht | 1320 (20.9) |
| Onze Lieve Vrouwe Gasthuis, Amsterdam | 998 (15.8) |
| Rijnland Hospital, Leiderdorp | 1128 (17.9) |
| Specialism | |
| General surgery | 3897 (61.7) |
| Orthopaedic surgery | 587 (9.3) |
| Gynaecology | 345 (5.5) |
| Urology | 323 (5.1) |
| Plastic surgery | 158 (2.5) |
| Cardiothoracic surgery | 157 (2.5) |
| ENT surgery | 157 (2.5) |
| Ophthalmic surgery | 140 (2.2) |
| Neurosurgery | 83 (1.3) |
| Oral surgery | 63 (1.0) |
| Paediatric surgery | 61 (1.0) |
| Other | 106 (1.7) |
| Specialism not specified on checklist | 236 (3.7) |
| Type of anaesthesia | |
| General | 4289 (67.9) |
| Local/regional | 575 (8.9) |
| Type of anaesthesia not specified on checklist | 1467 (23.2) |