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Table 1: 
Sensitivity, specificity, PPV, and NPV in MDCTA and US-ECD
MDCTA (%)US-ECD (%)
Sensitivity93.7537.5
    95% CI0.854–10.207–0.543
Specificity98.5991.5
    95% CI0.959–10.851–0.980
PPV96.7466.7
    95% CI0.906–10.449–0.884
NPV97.276.5
    95% CI0.934–10.675–0.885
  • Note:—PPV indicates positive predictive value; NPV, negative predictive value; CI, confidence interval; MDCTA, multidetector row CT angiography; US-ECD, ultrasound echo color Doppler.