Review Article
A Critical Evaluation of Carotid Duplex Scanning in the Diagnosis of Significant Carotid Artery Occlusive Disease
| | | >50% stenosis | >70% stenosis |
| | Sensitivity (TP/TP + FN) | 97.94% | 96.10% | | Specificity (TN/TN + FP) | 83.33% | 88.00% | | Overall accuracy (TP + TN/TP + TN + FP + FN) | 94.49% | 92.91% | | Positive predictive value (TP/TP + FP) | 95.00% | 92.50% | | Negative predictive value (TN/TN + FN) | 92.59% | 93.62% | | False positive FP/(FP + TN) | 16.67% | 12.00% | | False negative FN/(FN + TP) | 2.06% | 3.90% |
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