|    | 
        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 | 
       
      |