目的：本研究旨於調查長期住院慢性精神病患BMI≧24 kg/m2 之盛行率，並進一步探討其相關危險因子。方法：採橫斷性研究法，以東台灣某精神專科醫院住院慢性精神病患為研究對象，有效樣本數計1,030 人。資料經由病歷檔案分析、問卷訪查、身高及體重測量等方法蒐集個案的人口學資料、服用非典型抗精神病藥物、飲食及運動行為。結果： BMI≧24 kg/m2 之盛行率為66.1%；卡方分析發現研究對象之BMI 是否≧24 kg/m2 在種族別、正餐飲食別、運動時間及運動強度等變項達顯著差異；邏輯迴歸分析顯示正餐飲食別、正餐飲食量、運動頻率、運動時間及運動強度為顯著之預測因子。結論：本研究結果顯示長期住院慢性精神病患的BMI≧24kg/m2 盛行率較台灣一般民眾為高，鑑於肥胖係主要健康危險因子，針對住院慢性精神病患提供體重控制介入至屬必要。

Objective: This study investigated the prevalence of overweight, defined as BMI≧24 kg/ m2, and its associated risk factors in chronic mentally ill inpatients. Methods: This cross-sectional study included 1,030 inpatients in a psychiatric hospital in eastern Taiwan. Data were collected from medical records, questionnaire, and measurement of participants' height and weight. Demographic data, use of atypical antipsychotics, diet and exercise behaviors were analyzed. Results: The prevalence of BMI≧24 kg/m2 was 66.1%. The variables of diet category, exercise duration, exercise intensity, and races including Fukein-Taiwanese、Hakka、Mainlander、Aborigines were significantly different between patients with BMI above and below 24. The significant predictors of the BMI≧24 kg/m2 by logistic regression were diet category, diet quantity, exercise frequency, exercise duration, and exercise intensity. Conclusion: This study showed that the prevalence of BMI≧24 kg/m2 in chronic mentally ill inpatients was much higher than in the general population in Taiwan. These findings illustrate the necessity of providing weight control programs for these inpatients in order to prevent obesity related diseases.