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Medical AI Inquiry: You was designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.  Labels: OBJECTIVE, METHODS, RESULTS. Meshes: Aged, Body Mass Index, Carcinoma, Hepatocellular, Disease-Free Survival, Female, Humans, Japan, Kaplan-Meier Estimate, Liver Neoplasms, Male, Middle Aged, Multivariate Analysis, Postoperative Period, Retrospective Studies, Risk Factors, Thinness.
user
Do underweight patients show an increased rate of postoperative death after surgery for hepatocellular carcinoma? Context: To evaluate the influence of body mass index (BMI) on postoperative death in patients undergoing surgery for HCC. Three hundred forty-two patients were enrolled, and divided into three groups: Group A, BMI <22.5; Group B, BMI ≥22.5 to <25; Group C, BMI ≥25. Univariate and multivariate analyses of postoperative death were performed to compare BMI with clinical factors. Kaplan-Meier analysis and log rank test were used to compare such outcome in Groups A, B, and C. Kaplan-Meier analysis and log rank test revealed that Group A had a higher rate of postoperative death than Group B or C (P = 0.010). Univariate and multivariate analyses selected being underweight (Group B, C/Group A) (odds ratio, 1.829; 95% C.I., 1.091-3.068; P = 0.022) as one of the factors predictive of postoperative death, together with aspartate aminotransferase level (P = 0.042) and HCC growth pattern (P = 0.032).
assistant
BMI is a simple but important predictor of postoperative death in patients undergoing surgery for HCC, and is able to classify such patients into three independent groups. Final Decision: yes