Second, the total
volume is also important and this will increase as
the population ages, as greater than 50% of all blood
is transfused to the older population (>65 years). (3)
Practice of evidence-based medicine. There is evidence
of variation in physician transfusion practice
without any clear evidence of a beneficial effect of
more transfusion on patient outcome [2]. This would
indicate that some physician practices in transfusion
medicine are at variance with established data, presenting
the opportunity for improvement