Murakami Kentaro, Sasaki Satoshi, Takahashi Yoshiko, Uenishi Kazuhiro
Department of Social and Preventive Epidemiology, School of Public Health, the University of Tokyo, Tokyo, Japan.
Nutrition. 2008 Oct;24(10):925-32. doi: 10.1016/j.nut.2008.04.002. Epub 2008 Jun 10.
Experimental trials using test meals suggest that water promotes satiety and decreases subsequent intake, thus possibly working to prevent obesity, when it is consumed as an integral component of a food, but not when consumed alone or alongside a food. We examined the associations of intake of water from beverages and intake of water from foods with body mass index (BMI) and waist circumference in free-living humans consuming self-selected diets.
This observational cross-sectional study included 1136 female Japanese dietetic students 18-22 y of age. Dietary intake was assessed with a validated, self-administered, comprehensive, diet-history questionnaire. BMI was calculated using measured body height and weight. Waist circumference was measured at the level of the umbilicus.
Means +/- standard deviations of BMI, waist circumference, intake of water from beverages, and intake of water from foods were 21.3 +/- 2.7 kg/m(2), 72.9 +/- 7.1 cm, 569 +/- 318 g/1000 kcal, and 476 +/- 110 g/1000 kcal, respectively. After adjustment for potential confounding factors, intake of water from beverages was not associated with BMI (P for trend = 0.25) or waist circumference (P for trend = 0.43). Conversely, intake of water from foods showed independent and negative associations with BMI (P for trend = 0.030) and waist circumference (P for trend = 0.0003).
Intake of water from foods, but not water from beverages, was independently associated with lower BMI and waist circumference in free-living humans consuming self-selected diets.
使用测试餐的实验性试验表明，当水作为食物的一个组成部分被摄入时，它能促进饱腹感并减少随后的食物摄入量，从而可能有助于预防肥胖，但单独饮用或与食物一起饮用时则不然。我们研究了自由选择饮食的健康人群中，饮料中的水摄入量和食物中的水摄入量与体重指数（BMI）及腰围之间的关联。
这项观察性横断面研究纳入了1136名18 - 22岁的日本女性营养学专业学生。通过一份经过验证的、自我填写的、全面的饮食史问卷来评估饮食摄入量。使用测量的身高和体重计算BMI。在脐部水平测量腰围。
BMI、腰围、饮料中的水摄入量和食物中的水摄入量的均值±标准差分别为21.3±2.7kg/m²、72.9±7.1cm、569±318g/1000kcal和476±110g/1000kcal。在对潜在混杂因素进行调整后，饮料中的水摄入量与BMI（趋势P值 = 0.25）或腰围（趋势P值 = 0.43）均无关联。相反，食物中的水摄入量与BMI（趋势P值 = 0.030）和腰围（趋势P值 = 0.0003）呈独立的负相关。
在自由选择饮食的健康人群中，食物中的水摄入量而非饮料中的水摄入量与较低的BMI和腰围独立相关。
