Table 3.

Diagnostic accuracy of MDCT for detection of graft patency

	Sensitivity (%)	Specificity (%)	PPV (%)	NPV (%)	Accuracy (%)
Overall n = 116	92.8	100	100	84.6	94.8
IMA grafts n = 35	82.8	100	100	50	85.3
SVG n = 77	98.1	100	100	96.3	98.7
Other n = 4	100	100	100	100	100

IMA: internal mammary artery; SVG: saphenous vein graft; PPV: positive predictive value; NPV: negative predictive value.