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.