Table 1 Measures of diagnostic validity and optimal PSV cut off values for the detection of ≥50% basilar artery stenosis using TCD and TCCS
Comparison | N | PSV cut off cm/s | Sensitivity % | Specificity % | AUC (CI 95%) |
|---|---|---|---|---|---|
TCD, TCCS vs CTA, DSA | 104 | 124 | 74.0 | 65.0 | 0.70 (0.60–0.80) |
Unstented artery | |||||
TCD vs CTA, DSA | 69 | 146 | 61.0 | 65.0 | 0.66 (0.53–0.79) |
TCD vs DSA | 17 | 145 | 54.0 | 100.0 | 0.73 (0.49–0.97) |
TCD vs CTA | 52 | 165 | 30.3 | 95.0 | 0.65 (0.50–0.80) |
Stented artery | |||||
TCD, TCCS vs DSA | 35 | 123 | 71.0 | 82.0 | 0.63 (0.35–0.91) |
TCD vs DSA | 29 | 123 | 67.0 | 78.0 | 0.56 (0.25–0.87) |
TCCS vs DSA | 6 | 132 | 100 | 100 | 1.00a |