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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