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Table 2: 
Diagnostic accuracy measures for pseudo-occlusion recognition on CTA compared with DSA for observers 1 and 2
Pseudo-OcclusionAtherosclerotic CauseDissection
Observer 1
    Sensitivity (95% CI)82 (57–96)92 (64–100)63 (35–85)
    Specificity (95% CI)76 (56–90)100 (89–100)90 (73–98)
    PPV67 (50–80)100 (76–100)77 (52–92)
    NPV88 (72–95)97 (83–100)82 (70–90)
Observer 2
    Sensitivity (95% CI)82 (57–96)100 (75–100)75 (47–93)
    Specificity (95% CI)86 (68–96)100 (89–100)90 (73–98)
    PPV78 (58–90)100 (77–100)80 (57–92)
    NPV89 (75–95)100 (90–100)87 (74–94)
  • Note:—PPV indicates positive predictive value; NPV, negative predictive value.