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肥胖婦女減重對其與常見代謝疾病相關之血中指標之影響.

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肥胖婦女減重對其與常見代謝疾病相關之血中指標之影響.

劉美媛;葉松鈴;陳維昭

Abstract

體重過重或肥胖常與許多慢性疾病的發生或嚴重程度有正相關,而減重可使其疾病症狀減輕或消 除。本研究針對肥胖及減重對一些與代謝疾病相關之生化指標做探討。受測者爲 67 個停經前之 肥胖女性,依身體質量指數(BMI)26.4-30.8 者分爲輕度肥胖組,而BMI>30.8 者爲中度肥胖組, 以飮食控制方式減輕體重,追蹤半年,取體重減輕量大於原體重 5%以上之 29 人,與年齡身高 相當之正常體重者 18 人組成之控制組互相比較,並探討減重前後血中代謝指標的變化。結果顯 示:肥胖者與正常體重者之血漿白蛋白及血比容無差異,血紅素則肥胖者較正常體重者爲高,三 項指標在減重前後均無顯著差異,顯示低熱量之飮食控制對減重者之一般營養狀況無不良影響。 肥胖者肝臓功能不正常之比例遠較體重正常者高,因爲血漿天門冬酸轉胺酵素和丙胺酸轉胺酵素 肥胖者有一半以上高於正常值(41/67),而正常體重者則只有 16.7%高於正常值(3/18),但減重並 不能使此二種酵素之活性降至正常。血漿尿酸值以中度肥胖者顯著高於輕度肥胖及正常體重者, 減重後尿酸值顯著降低但仍較正常體重者爲高。空腹血糖濃度在中度、輕度肥胖組及正常體重組 間沒有顯著差異,但胰島素濃度則以中度肥胖組高於輕度肥胖組,且輕度肥胖組高於正常體重組 (p<0.0001)。減重後空腹血糖及胰島素濃度皆有明顯的下降(p<0.01),血糖可降至正常體重組之水 準,但胰島素值則仍較正常體重組爲高。葡萄糖耐量試驗方面之結果可見,減重對胰島素濃度並 無顯著影響,但 120 及 150 分鍾時之血糖濃度則以減重後顯著較減重前低。綜而言之,減重 5% 以上有降低血漿尿酸、血糖、胰島素值及肥胖所引致之胰島素阻抗性的效應。

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