Table 3.
Predictive performance of diaphragmatic excursion in intubation within 48 h
| Diaphragmatic excursion (cm) | Sensitivity | Specificity | PPV | NPV | Predicted probability |
|---|---|---|---|---|---|
| Cohort (N = 314), AUROC 0.850 (95% CI 0.807–0.894) | |||||
| ≥ 2.00 | – | – | – | – | 3.4% (− 0.4, 7.3) |
| 1.60–1.99 | 97.3% (92.4–99.4) | 41.8% (34.9–48.9) | 48.5% (41.8–55.2) | 96.6% (90.3–99.3) | 12.8% (3.2–22.3) |
| 1.21–1.59 | 92.2% (85.4–96.3) | 62.2% (55.1–68.9) | 57.8% (50.2–65.1) | 93.3% (87.6–96.9) | 25.6% (12.5–38.6) |
| 0.91–1.20 | 82.3% (74.0–88.8) | 78.1% (71.7–83.6) | 67.9% (59.4–75.6) | 88.7% (83.1–93.0) | 58.5% (45.2–71.8) |
| ≤ 0.90 | 54.9% (45.2–64.2) | 89.1% (83.9–93.0) | 73.8% (63.1–82.8) | 77.8% (71.9–83.0) | 73.8% (64.4–83.2) |
AUROC area under the receiver-operating characteristic curve, NPV negative predictive value, PPV positive predictive value