Transfusion-Refusing Population Transfusion-Accepting Population p Value
Isolated CABG 35, 20% 33, 20% 0.34
Ascending aorta replacement 19, 80% 19, 60% 0.98
Aortic valve replacement 20, 40% 22, 40% 0.44
Mitral valve repair 15, 30% 14, 90% 0.85
Mitral valve replacement 4, 10% 3, 40% 0.34
Other 5, 20% 6, 50% 0.26
Table 1: Distribution by type of operation in the subpopulation analysed.