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| Variable | Hazard ratio (95% CI) | P valve |
|---|---|---|
| Other benign tumours | 21.301 (1.307–347.292) | 0.032 |
| Malignant tumours | 7.223 (0.828–63.033) | 0.074 |
| Preoperative EF | 0.825 (0.690–0.985) | 0.034 |
| Surgery time | 1.012 (0.999–1.025) | 0.066 |
| Time to extubation | 1.018 (0.988–1.049) | 0.238 |
EF, ejection fraction.
