Table 1 Diagnostic performance of CT angiography

All patients (N = 262)

74.4 (68.7-79.6)

73.8 (67.1-79.6)

94.0 (85.4-98.3)

.839 (.797-.881)

97.3 (93.2-99.3)

55.3 (45.7-64.6)

Mild (n = 75)

66.7 (54.8-77.1)

64.0 (49.2-77.1)

92.0 (74.0-99.0)

.780 (.694-.866)

94.1 (80.3-99.3)

56.1 (39.7-71.5)

Moderate (n = 139)

73.4 (65.2-80.5)

73.5 (63.9-81.8)

94.6 (81.8-99.3)

.841 (.784-.897)

97.4 (90.9-99.7)

56.5 (43.3-69.0)

Severe (n = 48)

89.6 (77.3-96.5)

86.0 (72.1-94.7)

100 (47.8-100)

.930 (.878-.983)

100 (90.5-100)

45.5 (16.7-76.6)

Data were described as percentages with 95% confidence intervals except AUC. AUC, area under the receiver operating characteristics curve; PPV, positive predictive value; NPV, negative predictive value.