“…Two Austrian benchmark studies, conducted in cardiac, orthopedic, and abdominal surgery, showed that the preoperative Hb level was one of the main predictors of RBC transfusion 19,20. In a study of nonagenarians undergoing nonelective, nontrauma-related surgery, preoperative anemia was shown to be an independent risk factor for RBC transfusion 21. However, anemia had no significant impact on morbidity or mortality 21…”