Why the study?
What is the interobserver and intraobserver variability in the arteriographic assessment of the carotid bifurcation?
What is the interobserver and intraobserver variability in the arteriographic assessment of the carotid bifurcation?
Significant interobserver variability exists in the arteriographic assessment of carotid stenosis and morphology, which should be considered when evaluating patients for carotid endarterectomy.
Interobserver variability in carotid arteriography may affect stenosis grading; leaves open whether standardized protocols improve reproducibility.
We evaluated interobserver and intraobserver variability in the arteriographic assessment of the carotid bifurcation. Two neuroradiologists evaluated area stenosis and lumen surface morphology for 60 biplane carotid arteriograms in two reading sessions. Absolute interobserver differences for area stenosis averaged 8.8%, and interobserver differences were statistically significant for arteries of at least 50% stenosis. Analysis of observations for lumen surface morphology revealed statistically significant interobserver differences, averaging 29.5% disagreement. Intraobserver differences were not statistically significant. Observer variability for arteriography should be considered in the process of evaluating patients for carotid endarterectomy.
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Fisher et al. (1987) studied this question.
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