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Risk factors for perioperative mortality
| Patients | ||||||||||||
| Variable | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| Cardiovascular | * | * | * | * | * | * | * | * | * | |||
| Respiratory | * | * | * | |||||||||
| Connective tissue disorder | * | * | ||||||||||
| Diabetes | * | |||||||||||
| Immune suppression | * | * | ||||||||||
| Renal | * | * | * | |||||||||
| Perforation | * | * | * | * | * | * | * | * | ||||
| Abscess | * | * | * | * | ||||||||
| Bleeding | ||||||||||||
| Fistula | ||||||||||||
| Obstruction/stricture | ||||||||||||
| Phlegmon | ||||||||||||
| Age (year) | 86 | 80 | 60 | 80 | 83 | 85 | 86 | 65 | 84 | 82 | 77 | 84 |
| Sex:F = Female, M = Male | F | F | F | F | F | F | F | F | F | M | F | F |
