Table 3:

Interobserver and intermodality agreement for the identification of secondary feeders

	MRA		Interobserver Agreementa	MRAb	DSA	Intermodality Agreementc
	Reader 1	Reader 2
MMA	3	2		3	5
AMA	0	0		0	1
APhA	1	0		0	1
OA	0	0		0	1
OphA	1	2		1	1
ILT	0	0	15 (71%)	0	0	16 (76%)
MHT	5	3	κ = 0.58	5	4	κ = 0.72
ACA	2	2	[0.34–0.82]	2	2	[0.51–0.93]
MCA	2	4		2	2
PCA	0	0		0	0
SCA	0	0		0	0
AICA	0	1		1	0
PICA	0	0		0	0
None	7	7		7	4
Other	0	0		0	0

Note:—Data are number of meningiomas. Data in parentheses are the percentage of times that results that were concordant, and data in brackets are 95% confidence intervals. MMA indicates middle meningeal artery; AMA, accessory meningeal artery; APhA, ascending pharyngeal artery; OA, occipital artery; OphA, ophthalmic artery; ILT, inferolateral trunk; MHT, meningohypophyseal trunk; MCA, middle cerebral artery; ACA, anterior cerebral artery; PCA, posterior cerebral artery; SCA, superior cerebellar artery; AICA, anterior inferior cerebellar artery; PICA, posterior inferior cerebellar artery.

^aAgreement of MRA between Reader 1 and Reader 2.

^bConsensus reading of MRA of Reader 1 and Reader 2.

^cAgreement between the consensus reading of MRA of Reader 1 and Reader 2 and DSA.