Odds Ratios (OR) for blood transfusion during admission (n = 1887).

Model 1 = adjusted for age and gender; Model 2 = adjusted for age, gender, eGFR, depression; Model 3 = adjusted for age, gender, eGFR, depression, pre-operative hemoglobin level (<72 hours after surgery), Missing variables for pre-operative hemoglobin level and eGFR were imputed through multiple imputation; CI = Confidence Interval; OR = Odds Ratio; aOR = adjusted Odds Ratio; SSRI = Selective Serotonin Reuptake Inhibitor; eGFR = estimated Glomerular Filtration Rate; NSAIDs = Non-steroidal Anti Inflammatory Drugs.