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. 2003 Mar;24(3):456–462.

TABLE 2:

Detection of collateral pathways (n = 150) in 50 healthy subjects

Number of findings
Detection with MR Angiography* Detection with TCCD*
Total
Yes No
Observer 1
 Yes 105 5 110
 No 18 22 40
 Total 123 27 150
Observer 2
 Yes 107 9 116
 No 16 18 34
 Total 123 27 150
Diagnostic discrimination
Measure Observer 1 Observer 2
Sensitivity, % 85 (79, 92) 87 (81, 93)
Specificity, % 81 (62, 94) 67 (46, 84)
Positive predictive value, % 95 (90, 99) 92 (86, 96)
Negative predictive value, % 55 (39, 71) 53 (35, 70)
*

Yes indicates functional. No indicates nonfunctional.

Numbers in parentheses are the 95% confidence intervals.