Review Article
A Critical Evaluation of Carotid Duplex Scanning in the Diagnosis of Significant Carotid Artery Occlusive Disease
Table 2
(a) 2 × 2 table for calculation of 50% stenosis. (b) Accuracy of carotid duplex for 50% stenosis or greater.
(a) |
| Carotid duplex findings | Gold standard | >50% | <50% |
| >50% | 95 | 5 | <50% | 2 | 25 |
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(b) |
| Sensitivity | 97.94% | Specificity | 83.33% | Overall accuracy | 94.49% | Positive predictive value | 95.00% | Negative predictive value | 92.59% | False positive | 16.67% | False negative | 2.06% |
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