Figure 3.

Preoperative hemoglobin levels <12g/dl and <11 g/dl represent an independent risk factors for postoperative mortality and sepsis, respectively. Adjusted OR for postoperative outcomes in patients stratified by preoperative hemoglobin (Hb) levels. Values were obtained by multivariate analysis after adjustment for all identified confounders with P value ≤0.05 in the univariate analysis and included sex, severity of preoperative CKD (on the basis of serum creatinine and eGFR), severity of preoperative heart failure (NYHA classifications I and IV), baseline diabetes mellitus, incidence of blood transfusion, type of surgery (coronary artery bypass graft alone versus a combination of coronary artery bypass graft and valve surgery), use of diuretics, intraoperative inotrope use, and crossclamp and perfusion times. Selected groups were compared with the reference group with preoperative Hb>14 g/dl. Statistically significant values: *P=0.003; **P=0.04; ***P<0.005. NYHA, New York Heart Association.