• K Shevde, M Pagala, A Kashikar, C Tyagaraj, N Shahbaz, M Iqbal, and R Idupuganti.
• Department of Anesthesiology, Maimonides Medical Center, Brooklyn, NY 11219, USA.
• J Clin Anesth. 2000 Mar 1; 12 (2): 109-16.

Study ObjectiveTo determine factors that account for gender difference in the need for blood transfusion in coronary artery bypass graft (CABG) patients.DesignRetrospective study of consecutive patients.SettingAnesthesiology department of a teaching hospital.Patients253 CABG patients (163 males and 90 females).InterventionsPacked red blood cells (PRBCs), platelets, and fresh frozen plasma (FFP) were transfused depending on the need of each patient.Measurements And Main ResultsFor each patient, we recorded the gender, age, weight, height, body surface area (BSA), and duration of surgery. Hematocrit (Hct) levels prior to surgery, end of surgery, and at discharge from the hospital were recorded. PRBC administration and use of FFP and platelets were noted. Differences between the data for female and male patients were evaluated using Student's t-test, Chi-square test, and regression analysis. Approximately 60% female and only 20% male patients received PRBCs intraoperatively, whereas 78% females and only 43% males received PRBCs during their entire hospital stay. On average, females received 1.20 units of PRBCs intraoperatively and 2.38 units during the entire hospital stay, while the males received 0.31 units and 1.36 units for similar periods. Gender differences in PRBC transfusion persisted even when females and males were compared within the same subgroups for age, weight, duration of surgery, and preoperative Hct. PRBC units given intraoperatively had a significant correlation with age and preoperative Hct in females, but they had a significant correlation with age, preoperative Hct, and duration of surgery in males. PRBCs given during the entire hospital stay, however, had significant correlation with age, preoperative Hct, and duration of surgery in both females and males. Multiple logistic regression analysis showed that the probability of a patient receiving or not receiving PRBC transfusion is significantly influenced by age, preoperative PRBC mass, duration of surgery, and gender.ConclusionGender is an independent essential determinant of blood transfusion in CABG patients, and it may interact with age, weight, preoperative Hct, duration of surgery, and other factors in determining the probability of transfusion.

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