Surgical and procedural variables
| Variable | Study population |
| Surgical procedure, n (%) | |
| Major vascular | 52 (15) |
| Major orthopaedic | 80 (23) |
| General | 48 (13) |
| Major urological | 66 (19) |
| Major neurosurgery | 18 (5) |
| Lower risk | 88 (25) |
| Anaesthesia, n (%) | |
| General | 294 (84) |
| Spinal | 64 (18) |
| Epidural | 5 (1) |
| Nerve block | 53 (15) |
| Intraoperative haemodynamics, n (%) | |
| Hypotension (SBP <100 mm Hg) | 245 (70) |
| Duration of hypotension (mean±SD, min) | 33±24 |
| Hypertension (SBP >160 mm Hg) | 123 (35) |
| Bradycardia (HR <55 bpm) | 67 (19) |
| Tachycardia (HR >100 bpm) | 15 (4) |
| Duration of surgery | |
| Mean±SD, min | 117±73 |
| Median, min (25–75th percentile) | 105 (67–147) |
| Length of stay, days | |
| Mean±SD | 5.6±6.7 |
| Median (25–75th percentile) | 4 (2–7) |
Values are expressed as mean±SD, n (%) or median (IQR).
bpm, beats per minute; HR, heart rate; SBP, systolic blood pressure.