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Comparisons of operation-related indices.
| Group | Case | Survival rate n (%) | Operation time (min) | Hemorrhagic shock | Infection | Decannulation difficulty | Nerve and respiratory muscle damage | Perioperative complications, n (%) |
|---|---|---|---|---|---|---|---|---|
| Control | 30 | 14 (46.7) | 95.7±21.6 | 4 | 3 | 3 | 3 | 13 (43.3) |
| Observation | 32 | 23 (71.9) | 62.4±18.5 | 2 | 1 | 2 | 1 | 6 (18.8) |
| t (χ2) | 4.089 | 5.628 | 4.403 | |||||
| P-value | 0.043 | 0.032 | 0.036 |
