Table 3. Diagnostic performance of qualitative and quantitative SMI in the same sections.
| Parameter | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) | Accuracy (%) | AUC (95% CI) | P value |
|---|---|---|---|---|---|---|---|
| Longitudinal section | |||||||
| Qualitative SMI | 67.9 | 60.7 | 83.3 | 60.7 | 66.1 | 0.657 (0.560–0.745) | 0.005 |
| Quantitative SMI | 81.5 | 50.0 | 82.5 | 48.3 | 73.4 | 0.646 (0.549–0.735) | 0.02 |
| Transverse section | |||||||
| Qualitative SMI | 66.7 | 67.9 | 85.7 | 41.3 | 76.1 | 0.696 (0.600–0.780) | <0.001 |
| Quantitative SMI | 53.1 | 82.1 | 89.6 | 36.7 | 60.6 | 0.725 (0.632–0.806) | <0.001 |
SMI, superb microvascular imaging; PPV, positive predictive value; NPV, negative predictive value; AUC, area under the curve; CI, confidence interval.