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Table 3: Overall comparative diagnostic performance of CTA-MMBE*
Sensitivity Specificity PPV NPV
Per patient 
Observer A 0.94 (83/88) 0.95 (19/20) 0.99 (83/84) 0.79 (19/24)
    95% CI 0.87–0.98 0.75–1.00 0.93–1.00 0.59–0.91
Observer B 0.99 (87/88) 0.90 (18/20) 0.98 (87/89) 0.95 (18/19)
    95% CI 0.93–1.00 0.69–0.98 0.92–1.00 0.74–1.00
Consensus 0.99 (87/88) 0.90 (18/20) 0.98 (87/89) 0.95 (18/19)
    95% CI 0.93–1.00 0.69–0.98 0.92–1.00 0.74–1.00
Per location 
Observer A 0.87 (102/117) 1.00 (2070/2071) 0.99 (102/103) 0.99 (2070/2085)
    95% CI 0.80–0.92 1.00–1.00 0.94–1.00 0.99–1.00
Observer B 0.88 (103/117) 1.00 (2066/2071) 0.95 (103/108) 0.99 (2066/2080)
    95% CI 0.81–0.93 0.99–1.00 0.89–0.98 0.99–1.00
Consensus 0.91 (106/117) 1.00 (2068/2071) 0.97 (106/109) 0.99 (2068/2079)
    95% CI 0.84–0.95 1.00–1.00 0.92–0.99 0.99–1.00
* Numbers between parentheses are aneurysms or locations. With DSA, 117 aneurysms were detected in 88 patients on 2188 predefined observed locations.