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Table 1 The information of collected variables

From: Computer algorithm can match physicians’ decisions about blood transfusions

Demographic information

 Hospital

 Preoperative anemia

 Age

 Weight

 ASA grade (I–V)

 Type of admission

Comorbidities

 Hypertension

 Cardiaovascular problems

 Chronic obstractive pulmonary disease

 Diabetes

Operation information

 Type of surgical procedure

 Duration of surgery

 Volume of blood lost in surgery

 Hemogrobin (Hb) level before transfusion