Perioperative patient condition and support, surgical data and outcome
| All patients | Oncology | Degenerative spine disease | TBI | Haemorrhagic cerebrovascular disease | CSF disorder | Functional | Traumatic spine injury | Paediatrics | Infection | |
| Number of patients | 1677 | 522 | 324 | 191 | 187 | 157 | 104 | 78 | 63 | 51 |
| Preoperative airway support (at least venturi mask) (n (%) | 165 (9.8) | 9 (1.7) | 1 (0.3) | 52 (27.2) | 72 (38.5) | 15 (9.6) | 2 (1.9) | 11 (14.1) | 1 (1.6) | 2 (3.9) |
| Preoperative suspect of COVID-19? (n (%) | 45 (2.7) | 5 (1) | 0 | 11 (5.8) | 10 (5.3) | 14 (8.9) | 0 | 2 (2.6) | 2 (3.2) | 1 (2) |
| Screening swab test<72 hour preoperatively (n (%) | ||||||||||
| Non tested | 768 (45.7) | 249 (47.7) | 145 (46.6) | 84 (45.4) | 101 (50.2) | 66 (42) | 35 (33.7) | 32 (41) | 10 (15.9) | 17 (33.3) |
| Negative | 895 (53.5) | 272 (52.1) | 164 (52.9) | 97 (52.4) | 96 (47.9) | 87 (55.4) | 69 (66.3) | 46 (59) | 53 (84.1) | 34 (66.7) |
| Positive | 14 (0.8) | 1 (0.2) | 1 (0.3) | 4 (2.2) | 4 (2) | 4 (2.5) | 0 | 0 | 0 | 0 |
| Postoperative airway support (n (%) | 250 (14.9) | 49 (9) | 3 (0.9) | 54 (28.3) | 93 (49.7) | 23 (14.6) | 3 (2.9) | 16 (20.5) | 5 (7.9) | 6 (11.8) |
| Length of hospital stay | 5 days (IQR=9) | 5 days (IQR=5) | 2 days (IQR=3) | 4 days (IQR=11) | 15 days (IQR=29) | 6 days (IQR=19) | 2 days (IQR=3) | 7 days (IQR=11) | 5 days (IQR=4) | 8 days (IQR=25) |
| Complications (n (%) | ||||||||||
| None | 1243 (74.1) | 370 (70.9) | 370 (90.4) | 139 (72.8) | 105 (56.1) | 108 (68.8) | 92 (88.5) | 53 (67.9) | 52 (82.5) | 31 (60.8) |
| Perioperative SARS-CoV-2 infection (n (%) | ||||||||||
| Awaiting surgery | 6 (0.4) | 3 (0.6) | 0 | 0 | 0 | 2 (1.3) | 0 | 1 (1.3) | 0 | 0 |
| Preoperatively screening | 14 (0.8) | 1 (0.2) | 1 (0.3) | 4 (2.1) | 4 (2.1) | 4 (2.5) | 0 | 0 | 0 | 0 |
| In-hospital admission | 13 (0.8) | 7 (1.3) | 0 | 1 (0.5) | 2 (1.1) | 2 (1.3) | 0 | 0 | 0 | 1 (2) |
| After hospital discharge<30 days | 11 (0.7) | 5 (0) | 0 | 1 (0.5) | 2 (1.1) | 1 (0.6) | 0 | 2 (2.6) | 0 | 0 |
| After hospital discharge>30 days | 3 (0.2) | 1 (0.2) | 0 | 1 (0.5) | 0 | 0 | 0 | 0 | 0 | 0 |
| Outcome after 3 months of study entry (n (%) | ||||||||||
| Alive, at home | 1376 (82.1) | 440 (84.3) | 315 (97.2) | 143 (74.9) | 107 (57.2) | 115 (73.2) | 102 (98.1) | 50 (64.1) | 62 (98.4) | 42 (82.4) |
| Alive, in-hospital | 61 (3.6) | 20 (3.8) | 3 (0.9) | 5 (2.6) | 13 (7) | 14 (8.9) | 1 (1) | 2 (2.6) | 1 (1.6) | 2 (3.9) |
| Alive, transfer to other hosp. | 33 (2) | 5 (1) | 3 (0.9) | 9 (4.7) | 5 (2.7) | 4 (2.5) | 0 | 5 (6.4) | 0 | 2 (3.9) |
| Alive, at nursing facility | 91 (5.4) | 13 (2.5) | 3 (0.9) | 12 (6.3) | 32 (17.1) | 14 (8.9) | 1 (1) | 13 (16.7) | 0 | 3 (5.9) |
| Dead | 114 (6.8) | 43 (7.9) | 0 | 22 (11.5) | 29 (15.5) | 10 | 0 | 8 | 0 | 2 (.9) |
| Unknown | 2 (0.1) | 1 (0.2) | 0 | 0 | 1 (0.5) | 0 | 0 | 0 | 0 | 0 |
| Cause of death, n (%) | ||||||||||
| Neurosurgical disease | 77 (4.6) | 29 (5.6) | 0 | 14 (7.3) | 26 (13.9) | 5 (3.2) | 0 | 3 (3.8) | 0 | 0 |
| New medical condition | 26 (1.6) | 9 (1.7) | 0 | 6 (3.1) | 2 (1.1) | 0 | 0 | 4 (5.1) | 0 | 2 (3.9) |
| COVID-19 or its complications | 8 (0.5) | 1 (0.2) | 0 | 1 (0.5) | 1 (0.5) | 2 (1.3) | 0 | 1 (1.3) | 0 | 0 |
| Other | 2 (0.1) | 1 (0.2) | 0 | 1 (0.5) | 0 | 3 (1.9) | 0 | 0 | 0 | 0 |
| Time of death, n (%) | ||||||||||
| Postoperative day 0–7 | 28 (1.7) | 7 (1.3) | 0 | 8 (4.2) | 10 (5.3) | 2 (1.3) | 0 | 0 | 0 | 1 (2) |
| Postoperative day 8–30 | 79 (4.7) | 33 (6.3) | 0 | 12 (6.3) | 17 (9.1) | 8 (5.1) | 0 | 8 (10.3) | 0 | 1 (2) |
| Postoperative>30 | 7 (0.4) | 3 (0.6) | 0 | 2 (1) | 2 (1.1) | 0 | 0 | 0 | 0 | 0 |
CSF, cerebrospinal fluid; TBI, traumatic brain injury.