Review Article
A Critical Evaluation of Carotid Duplex Scanning in the Diagnosis of Significant Carotid Artery Occlusive Disease
Table 3
(a) 2 × 2 table for calculation of 70% stenosis. (b) Accuracy of carotid duplex for 70% stenosis or greater.
| (a) |
| | Carotid duplex findings | Gold standard | | >70% | <70% |
| | >70% | 74 | 6 | | <70% | 3 | 44 |
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| (b) |
| | Sensitivity | 96.10% | | Specificity | 88.00% | | Overall accuracy | 92.91% | | Positive predictive value | 92.50% | | Negative predictive value | 93.62% | | False positive | 12.00% | | False negative | 3.90% |
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