|AUC in Predicting CA|
|Cutpoint (% NASCET)||Cohen’s Kappa||Differences 4D/3DC-US Minus CA||Concordance Correlation of 4D/3DC-US With CA|
|50%||70%||Kappa (95% CI)||Mean (%)||SDD (%)||CCC (95% CI)|
|All stenoses (n = 103)||0.99||0.93||0.75 (0.64–0.86)||+1.7||8.1||0.89 (0.84–0.92)|
|Subgroup of stenoses for interobserver analysis (n = 52)||0.98||0.93||0.74 (0.59–0.90)||+2.4||8.4||0.80 (0.68–0.88)|
AUC = area under the curve; CCC = concordance correlation coefficient; CI = confidence interval; 4D/3DC-US = 4-dimensionally guided 3-dimensional real-time gray-scale color-Doppler ultrasonography; K = linear weighted Cohen’s kappa; SDD = standard deviation of differences; other abbreviations as in Table 1.
↵∗ Comparison of 4D/3DC-US in whole population (n = 103) and a subset (n = 52 stenoses) with CA reference standard.