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Risk intervals of POT based on the nomogram
| Risk intervals | Very low risk (< 156 points) | Low risk (156–174 points) | Medium risk (175–207 points) | High risk (> 207 points) |
|---|---|---|---|---|
| Estimated probability (%) | < 5 | 5–10 | 10–30 | > 30 |
| Observed probability, % (95% CI) | 3.0 (0.6–5.5) | 7.4 (2.7–12.1) | 16.2 (9.7–22.6) | 44.2 (28.7–59.7) |
| No. of patients (%) | 197 (40.0) | 122 (24.8) | 130 (26.5) | 43 (8.7) |
CI, confidence interval; POH, postoperative tracheostomy
