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Sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) for expiratory diameter of IVC and caval index
| Sensitivity | Specificity | PPV | NPV | |
|---|---|---|---|---|
| IVC diameter | 85.5 (79.4–90.4) | 100 (97–100) | 100 (97.5–100) | 82.9 (75.9–88.7) |
| Caval index | 99.3 (96.3–99.9) | 100 (97–100) | 100 (97.5–100) | 99.2 (95.6–99.9) |
Considered cut-offs, on the basis of the coordinates in the ROC curve were, respectively, 1.55 cm and 48 %
