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Risk factors for invasive fungal infection in patients undergoing orthotopic liver transplantation were examined. Thirty-four of 168 transplants were complicated within 100 days after transplantation by documented invasive fungal infection (Candida species, 28 patients; mycelial fungi, 5; both Candida and Aspergillus species, 1). In the multivariate Cox proportional hazards model, three baseline and two posttransplant variables were independently significant risk factors for infection: level of creatinine (hazard ratio = 1.4), length of transplant operation (HR = 1.2), retransplantation (HR = 3.2), abdominal or intrathoracic reoperations (HR = 2.5), and cytomegalovirus infection (HR = 8.5). Four predictors (creatinine of > 3.0 mg/dL, operative time of > or = 11 h, retransplantation, and early colonization) assessable at the time of transplantation or shortly thereafter were incorporated into a simple predictive model for risk stratification. The risk of invasive fungal infection ranged from 1% in patients with no predictors to 67% in patients with two or more predictors. Strategies to prevent invasive fungal infections after liver transplantation should be targeted to these high-risk groups.