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Demographic details of included patients.
| Characteristic | Patients (n = 96) |
| Mean age, yrs (SD) | 63.2 (19.8) |
| Male, n (%) | 48 (50.0) |
| Mean BMI, kg/m2 (SD) | 27.8 (6.7) |
| ASA grade, n (%) | |
| 1 | 9 (9.4) |
| 2 | 43 (44.8) |
| 3 | 39 (40.6) |
| 4 | 5 (5.2) |
| BOA risk, n (%) | |
| Low | 32.3 (31) |
| Medium | 38 (39.6) |
| High | 20 (20.8) |
| Very High | 7 (7.3) |
ASA, American Society of Anaesthesiologists; BMI, body mass index; BOA, British Orthopaedic Association.
