Table 3:

Summary of localization of SDAVF at CTA and DSA

Case No.	CTA		Interobserver Agreement^a	CTA^b	DSA	Intermodality Agreement^c
Case No.	Reader 1	Reader 2	Interobserver Agreement^a	CTA^b	DSA	Intermodality Agreement^c
1	FM	FM		FM	FM
2	T5	T5		T5	T5
3	T6	T6		T6	T6
4	T8	T9		T9	T7
5	T7	T7		T7	T7
6	T10	T12	7 (58%)	T12	T7	7 (58%)
7	T8	T8	κ = 0.84	T8	T8	κ = 0.41
8	L2	L3	[0.72–0.96]	L2	T9	[0.02–0.84]
9	T8	T7		T8	L2
10	T9	T8		T9	L2
11	L3	L3		L3	L3
12	S1	S1		S1	S1

Note:—Data are number of cases. Data in parentheses are the percentage of times that results were concordant; data in brackets are 95% CIs.
FM indicates foramen magnum; T, thoracic spine; L, lumbar spine; S, sacral spine.
↵a Agreement of CTA between reader 1 and reader 2.
↵b Consensus reading at CTA of reader 1 and reader 2.
↵c Agreement between the consensus reading at CTA of reader 1 and reader 2 and DSA.