Table 6. Projected numbers needed to treat (NNT) to prevent one transfusion across categories of predicted risk.

Predicted risk	<1%	1–5%	>5%
NNT with Bivalirudin instead of Heparin only to prevent one transfusion	1721	664	28
NNT with Bivalirudin instead of Glycoprotein IIbIIIa inhibitor and Heparin to prevent one transfusion	202	76	19
NNT with radial access versus femoral approach to prevent one transfusion	244	69	18