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Table 3: 
Summary of localization of SDAVF at CTA and DSA
Case No.CTAInterobserver AgreementaCTAbDSAIntermodality Agreementc
Reader 1Reader 2
1FMFMFMFM
2T5T5T5T5
3T6T6T6T6
4T8T9T9T7
5T7T7T7T7
6T10T127 (58%)T12T77 (58%)
7T8T8κ = 0.84T8T8κ = 0.41
8L2L3[0.72–0.96]L2T9[0.02–0.84]
9T8T7T8L2
10T9T8T9L2
11L3L3L3L3
12S1S1S1S1
  • 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.