Diagnostic Performance of General Practitioner–Performed Compression US for Proximal DVT
| DVT Site | Sensitivity, % (95% CI) | Specificity, % (95% CI) | PPV, % (95% CI) | NPV, % (95% CI) | Accuracy, % (95% CI) | Cohen κ, % (95% CI) |
|---|---|---|---|---|---|---|
| Overall | 90.0 (88.2–91.8) | 97.1 (96.2–98.1) | 87.4 (85.4–89.3) | 97.8 (96.9–98.6) | 95.8 (94.7–97.0) | 0.86 (0.84–0.88) |
| Femoral | 95.2 (93.9–96.5) | 98.8 (98.2–99.4) | 89.2 (87.4–91.0) | 99.5 (99.1–99.9) | 98.5 (97.7–99.2) | 0.91 (0.89–0.93) |
| Popliteal | 89.5 (87.7–91-3) | 98.4 (97.7–99.2) | 90.1 (88.3–91.8) | 98.3 (97.6–99.1) | 97.2 (96.2–98.2) | 0.88 (0.86–0.90) |
| Both | 98.7 (98.0–99.3) | 100 (99.9–100) | 100 (99.9–100) | 99.9 (99.7–100) | 99.9 (99.7–100) | 0.99 (0.98–0.99) |
DVT = deep vein thrombosis; NPV = negative predictive value; PPV = positive predictive value; US = ultrasound.
Note: Diagnosis of physician expert in vascular US was the reference test.