Variable | OR | Rank score |
Age (years) | ||
30–49 | 1.134 | 1 |
50–74 | 1.731 | 2 |
75–84 | 2.009 | 2 |
≥85 | 1.548 | 2 |
Surgical risk (moderate/severe) | 5.207 | 3 |
Anaemia status | ||
Mild | 1.352 | 1 |
Moderate/severe | 1.588 | 2 |
ASA Classification | ||
3 | 5.199 | 3 |
4 | 29.481 | 4 |
Emergency surgery | 1.660 | 2 |
Male gender | 1.322 | 1 |
Congestive heart failure | 1.465 | 1 |
ASA, American Society of Anaesthesiologists.