Time after HFNO initiation | Maximum of Youden’s index | Rox index cut-off | Sensitivity* | 95% CI limits for sensitivity | Specificity | 95% CI limits for specificity | AUROC | ||
---|---|---|---|---|---|---|---|---|---|
Lower | Upper | Lower | Upper | ||||||
H0 | 0.393 | 6.20 | 63.3% | 48.3% | 76.6% | 76.0% | 61.8% | 86.9% | 0.70 |
H2-H4 | 0.413 | 6.88 | 78.0% | 62.4% | 89.4% | 63.3% | 48.3% | 76.6% | 0.71 |
H6 | 0.361 | 7.00 | 75.7% | 58.8% | 88.2% | 60.4% | 45.3% | 74.2% | 0.68 |
H12 | 0.320 | 8.73 | 87.1% | 70.2% | 96.4% | 44.9% | 30.7% | 59.8% | 0.66 |
H18 | 0.398 | 6.96 | 69.0% | 49.2% | 84.7% | 70.8% | 55.9% | 83.0% | 0.70 |
H24 | 0.490 | 6.96 | 77.3% | 54.6% | 92.2% | 71.7% | 56.5% | 84.0% | 0.75 |
H48 | 0.343 | 5.00 | 43.8% | 19.8% | 70.1% | 90.5% | 77.4% | 97.3% | 0.67 |
H72 | 0.543 | 5.78 | 80.0% | 44.4% | 97.5% | 74.3% | 56.7% | 87.5% | 0.77 |