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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.

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)^†