Table 2.

Paired Replicate Rescan Estimates of Variability of the Different Plaque Metrics in the Multi‐Ethnic Study of Atherosclerosis

Methods of Estimating Plaque	Value	Lower 95% CI	Upper 95% CI	No. of Replicate Values	Measure of Agreement/Association
Any plaque (>0%)	0.886	0.854	0.919	144	κ
Plaque (≥25%)	0.833	0.793	0.874	144	κ
Maximum internal carotid artery IMT*, mm	0.908	0.874	0.933	141	Pearson
Combined subjective and far wall IMT >1.5 mm	0.944	0.917	0.971	144	κ
Maximum ICA IMT (>1.5 mm)*	0.870	0.836	0.904	141	κ
Mean of the maximum ICA IMT, mm	0.897	0.859	0.925	141	Pearson

Examinations were blindly reread after blinded replicate scans. Because of the blinded nature of the replicate scanning protocol, the same reader was likely to reread the replicate examination. From a total of 151 blinded rescans and then blinded interpretations, 144 were from the same readers. ICA indicates internal carotid artery; IMT, intima‐media thickness.

^*Measurements were not obtained for the ICA IMT in 3 of the 144 replicate studies.