Logistic regression of factors associated with occurrence of 30-day complication
| Variables | OR (95% CI) | P value |
| Age | 1.02 (1.00 to 1.03) | 0.007 |
| Gender | 0.86 (0.50 to 1.48) | 0.595 |
| Comorbidity | 1.34 (0.73 to 2 .43) | 0.343 |
| Smoking | 1.56 (0.80 to 3.04) | 0.188 |
| Urgency of surgery | 1.24 (0.72 to 2.12) | 0.433 |
| Surgery indications | 3.71 (1.91 to 7.22) | <0.001 |
| Tourniquet use | 0.86 (0.48 to 1.52) | 0.596 |
| Regional/General anaesthetic usage | 3.31 (1.85 to 5.93) | <0.001 |