Table 1.
Sensitivity, Specificity, and Positive and Negative Likelihood Ratios for Predetermined LUS Cutoffs in Predicting Mortality
| Cutoffs | Sensitivity | Specificity | Correctly Classified | LR+ | LR– |
|---|---|---|---|---|---|
| ≥0 | 100 | 0 | 25 | 1 | - |
| ≥1 | 83.3 | 30.6 | 43.8 | 1.2 | 0.50 |
| ≥2 | 75.0 | 38.9 | 47.9 | 1.23 | 0.64 |
| ≥3 | 66.7 | 44.4 | 50.0 | 1.20 | 0.75 |
| ≥4 | 58.3 | 63.9 | 62.5 | 1.62 | 0.65 |
| ≥5 | 50.0 | 69.4 | 64.6 | 1.63 | 0.72 |
| ≥6 | 33.3 | 80.6 | 68.8 | 1.71 | 0.83 |
| ≥7 | 8.3 | 88.9 | 68.8 | 0.75 | 1.03 |
| ≥9 | 0.0 | 94.4 | 70.8 | 0 | 1.03 |
| ≥11 | 0 | 97.2 | 72.9 | 0 | 1.03 |
LR+, positive likelihood ratio; LR–, negative likelihood ratio.
Bold values indicate lung ultrasound scores ≥4, which were the most predictive in mortality among all the cutoff points considered, based on Youden's index.