Article Figures & Data
Figures
- Fig 1.
Examples of observer variability in the assessment of completeness of cerebral aneurysm therapy. A carotid aneurysm before (A) and immediately after (B) endovascular therapy, which was assessed variably as “complete,” “dog ear,” and “incomplete.”
Tables
- Table 1:
Comparison of interobserver agreement for assessment of aneurysm treatment using 4-, 3-, and 2-response scales and “better/same/worse” scale
Assessment Concordant Rate p κ (95% CI) Initial angiogram 4-Response .58 0.50 (0.38–0.61)* 3-Response .71 0.54 (0.42–0.67)* 2-Response .94 0.63 (0.40–0.87)† Follow-up angiogram 4-Response .63 0.66 (0.55–0.77)* 3-Response .72 0.67 (0.55–0.79)* 2-Response .96 0.87 (0.74–0.99)† Comparing initial with follow-up Better/same/worse .80 0.68 (0.55–0.81)* Not worse/worse .95 0.89 (0.78–0.99)† Note:— CI indicates confidence interval.
* Weighted κ.
† Simple κ.
- Table 2:
Comparison of intraobserver agreement for assessment of aneurysm treatment using 4-, 3-, and 2-response scales, and “better/same/ worse” scale
Assessment Observer 1 Observer 2 Concordant Rate p κ (95% CI) Concordant Rate p κ (95% CI) Initial angiogram 4-Response .70 0.67 (0.57–0.77)* .63 0.48 (0.34–0.62)* 3-Response .74 0.65 (0.54–0.76)* .69 0.50 (0.35–0.65)* 2-Response .91 0.66 (0.47–0.84)† .94 0.56 (0.28–0.85)†† Follow-up angiogram 4-Response .75 0.78 (0.69–0.87)* .77 0.78 (0.68–0.88)* 3-Response .78 0.75 (0.65–0.86)* .83 0.77 (0.65–0.88)* 2-Response .99 0.97 (0.91–1.00)† .96 0.89 (0.77–1.00)† Comparing initial with follow-up Better/same/worse .82 0.71 (0.58–0.84)* .78 0.64 (0.49–0.78)* Not worse/worse .93 0.80 (0.66–0.94)† .92 0.78 (0.63–0.92)† Note:— CI indicates confidence interval.
* Weighted κ.
† Simple κ.
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