Background/Aims: The effectiveness of laparoscopic sleeve gastrectomy (LSG) in measuring the quality of life (QOL) and personality in obese patients has not been previously investigated. This study aims to investigate different clinical outcome variables, the relationships between quality of life and different personality one-year after LSG in obese patients. Methodology: Sixty-one consecutive obese patients (49 females) who underwent LSG were evaluated for clinical characteristics after weight reduction. Chinese Personality Assessment Inventory and Gastrointestinal Quality-of-Life Index (GIQLI) were analyzed. Results: One year after LSG, mean body weight (BW), mean body mass index (BMI) and excess weight loss (EWL) were 66.5±13.6kg, 24.4±4.4kg/m 2 and 88.1±32.5%, respectively. Metabolic syndrome decreased from 45.1% to 9.8%. The significant variables were systolic blood pressure, fasting glucose, triglyceride, uric acid, aspartate aminotransferase, alanine aminotransferase, insulin, high sensitivity C-reactive protein, HbA1c, C-peptide and HOMA. All patients demonstrated improvement in two domains of the questionnaire (physical status and emotion status), but not in gastrointestinal symptoms. Although the "Agreeableness" dimension of Chinese personality had a lower presenting BMI (23.9kg/m 2) and better excess weight loss (88.0%), this group showed less improvement in gastrointestinal symptoms and had poorer physical status. Conclusions: LSG provided meaningful weight loss and improvement in quality of life. Chinese personality was the predictor of weight loss and GIQLI.
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