. Author manuscript; available in PMC: 2010 Sep 22.

Published in final edited form as: Magn Reson Imaging. 2010 Apr 13;28(5):621–628. doi: 10.1016/j.mri.2010.03.011

Table 3.

Performance measures for the DTI and DCE MRI and their combinations.

	DTI	DCE MRI	DTI and DCE MRI	DTI or DCE MRI
sensitivity	81% (22/27) (74% – 87%)	63% (17/27) (55% – 70%)	44% (12/27) (37% – 52%)	100% (27/27) (97% – 100%)
specificity	85% (167/196) (79% – 90%)	90% (160/177) (85% – 94%)	98% (174/177) (94% – 100%)	77% (136/177) (69% – 83%)
PPV	43% (22/51) (35% – 51%)	50% (17/34) (42% – 58%)	80% (12/15) (73% – 86%)	40% (27/68) (32% – 48%)
NPV	97% (167/172) (93% – 94%)	94% (160/170) (89% – 97%)	93% (174/187) (88% – 96%)	100% (136/136) (97% – 100%)
accuracy	85% (189/223) (78% – 90%)	87% (177/204) (80% – 91%)	91% (186/204) (85% – 95%)	80% (163/204) (73% – 85%)

DTI – diffusion tensor imaging

DCE MRI – dynamic contrast enhanced MRI

PPV – positive predictive value

NPV – negative predictive value

95% confidence intervals are provided in brackets