Table 3

Accuracy of Binary Stenosis Classification by 4D/3DC-US and DUS

Cutpoint (% NASCET)
50 (95% CI)70 (95% CI)
Modality4D/3DC-USDUS4D/3DC-USDUS
Sensitivity0.97 (0.93–1.00)0.92 (0.87–0.98)0.87 (0.77–0.96)0.92 (0.85–0.99)
Specificity0.92 (0.78–1.00)0.85 (0.65–1.00)0.84 (0.74–0.94)0.75 (0.63–0.87)
Accuracy0.96 (0.92–1.00)0.91 (0.86–0.97)0.85 (0.79–0.92)0.84 (0.76–0.91)
McNemar testp = 0.289p = 0.754

Values are point estimates with 95% CI. N = 103 stenoses.

DUS = duplex ultrasonography; other abbreviations as in Tables 1 and 2.