Table 3 Indices that assess the quality of the diagnostic test
Weighted* Kappa (95% CI) | |
|---|---|
ABI ≤ 0.90 | 0.68 (0.55–0.79) |
ABI ≤ 0.70 | 0.92 (0.81–1.00) |
Sensitivity (95% CI) | |
ABI ≤ 0.90 | 77.5% (61.5–89.2) |
ABI ≤ 0.70 | 85.7% (57.2–98.2) |
Specificity (95% CI) | |
ABI ≤ 0.90 | 98.2% (96.1–99.3) |
ABI ≤ 0.70 | 100% (99.0–100) |
PPV (95% CI) | |
ABI ≤ 0.90 | 83.8% (68.0–93.8) |
ABI ≤ 0.70 | 100% (73.5–100) |
NPV (95% CI) | |
ABI ≤ 0.90 | 97.3% (94.9–98.8) |
ABI ≤ 0.70 | 99.4% (98.0–99.9) |
Positive Likelihood ratio | |
ABI ≤ 0.90 | 42.5 (18.9–95.5) |
Negative Likelihood ratio | |
ABI ≤ 0.90 | 0.3 (0.1–0.4) |