Results of the observer study rating the visibility without and with MAR

	Without MAR			κ	With MAR			κ
	Overall Agreement, %	Score 1 Agreement, %	Score ≥2 Agreement, %		Overall Agreement, %	Score 1 Agreement, %	Score ≥2 Agreement, %
Stent visibility
P < .05
OR = 7.8	77	56	12	0.66	76	24	40	0.64
CI = 1.6–38.8
Vessel visibility
P < .05
OR = 8.7	76	52	12	0.64	72	20	40	0.58
CI = 1.7–45.2
Relationship
P < .05
OR = 9.0	81	60	12	0.72	70	20	36	0.56
CI = 1.7–47.0

	Overall Agreement, %	Yes Agreement, %	No Agreement, %	κ	Overall Agreement, %	Yes Agreement, %	No Agreement, %	κ
Obscuring beyond
coil mass?
(P < .0001
OR = 224.0	73	56	4	0.47	78	4	64	0.57
CI = 12.8–3926.0)

	Overall Agreement, %	Without MAR Agreement, %	With MAR Agreement, %	κ
Overall best visibility	94	0	92	0.89

Note:—The rows “stent visibility,” “vessel visibility,” and “relationship” show the summarized results to the 3-point scale questions. Given are the percent overall agreement (ie, the number of cases that all reviewers agreed in total, calculated using the Fleiss method), the percent agreement for a score 1 (ie, the number of cases all reviewers agreed on giving a score of 1), and the percent agreement for a score ≥2 (ie, the number of cases all reviewers agreed on giving a score of 2 or 3). Similarly, agreements for the binary questions are indicated. For each observer question, the κ values, P value, odds ratio (OR), and 95% confidence intervals (CI) are given when applicable. OR represents the improvement of classification of 1 to ≥2 with MAR.