Table 3.
Prediction performance characteristics for impedance planimetry measurements most strongly associated with a clinical response (Eckardt score ≤ 3).
| Characteristic and cutoff | Sensitivity,% | Specificity,% | PPV,% | NPV,% |
|---|---|---|---|---|
| ΔCSA (mm) | ||||
| ■ 25 | 89.85 | 41.67 | 94.47 | 27.03 |
| ■ 40 | 78.20 | 58.33 | 95.41 | 19.44 |
| ■ 55 | 59.02 | 70.83 | 95.73 | 13.49 |
| ■ 70 | 39.10 | 87.50 | 97.20 | 11.48 |
| ■ 85 | 19.17 | 91.67 | 96.23 | 9.28 |
| %ΔCSA | ||||
| ■ 150 | 92.48 | 37.5 | 94.25 | 31.03 |
| ■ 225 | 75.56 | 58.33 | 95.26 | 17.72 |
| ■ 300 | 57.89 | 70.83 | 95.65 | 13.18 |
| ■ 375 | 38.35 | 95.83 | 99.03 | 12.3 |
| ■ 450 | 23.68 | 100.0 | 100.0 | 10.57 |
| %ΔDI | ||||
| ■ 150 | 88.72 | 37.5 | 94.02 | 23.08 |
| ■ 225 | 74.44 | 54.17 | 94.74 | 16.05 |
| ■ 300 | 63.16 | 79.17 | 97.11 | 16.24 |
| ■ 375 | 47.37 | 87.5 | 97.67 | 13.04 |
| ■ 450 | 38.72 | 87.5 | 97.17 | 11.41 |
PPV, positive predictive value; NPV, negative predictive value; Δ, change in parameter; CSA, cross-sectional area; %Δ, percent change in parameter; DI, distensibility index.
Performance characteristics at each cutoff are based on the complete data.