Table 2:

Interrater agreement for the grading scale^{^a}

	CTA, Surgical (n = 30)	MRA, Endovascular (n = 30)	Total (n = 60)
Overall	0.58 (0.44–0.69)	0.69 (0.56–0.76)	0. 63 (0.55–0.70)
Experience
Junior (0–10 years; n = 14)	0.59 (0.43–0.72)	0.68 (0.56–0.76)	0.64 (0.54–0.71)
Senior (>10 years; n = 10)	0.56 (0.40–0.68)	0.69 (0.55–0.77)	0.62 (0.52–0.69)
Background
Core lab (n = 2)	0.74 (0.54–0.87)	0.81 (0.63–0.91)	0.77 (0.64–0.86)
INR (n = 11)	0.54 (0.38–0.68)	0.65 (0.53–0.74)	0.60 (0.50–0.68)
DNR (n = 2)	0.58 (0.23–0.80)	0.87 (0.72–0.97)	0.73 (0.55–0.85)
NSX (n = 7)	0.67 (0.54–0.77)	0.71 (0.56–0.81)	0.69 (0.59–0.76)
INL (n = 4)	0.53 (0.30– 0.71)	0.72 (0.57–0.82)	0.63 (0.50–0.73)

Note:—INR indicates interventional neuroradiology; DNR, diagnostic neuroradiology; NSX, neurosurgery; INL, interventional neurology.
↵a Data are α_K (95% CI) for the ordinal 3-grade classification. Classification grades: 1, complete occlusion; 2, residual neck (<2 mm); 3, residual aneurysm.