Alfieri M, Pomerleau J, Grace D M
Department of Clinical Nutrition, London Health Science Centre, Ontario, Canada.
Obes Surg. 1997 Feb;7(1):9-15. doi: 10.1381/096089297765556150.
Excess dietary fat has been implicated in the etiology of obesity.
This study examined the fat intake of three weight groups, normal (20.0 < or = BMI < or = 27.0), moderately obese (27.1 < or = BMI < or = 39.9) and severely obese (BMI > or = 40.0). Each group contained 50 subjects. Detailed 3-day food records were used to gather the nutritional data. Anthropometric and sociodemographic information was also collected.
Overall fat intake was 89 +/- 42 g/day or 37 +/- 10% of total energy. Total fat (g/1000 kcalories) intake was found to be significantly higher in the obese groups (p < 0.05). Subjects in the moderately and severely obese groups consumed significantly more fat and cholesterol and less carbohydrate than did normal weight subjects. Compared to the normal weight subjects, obese subjects also had higher intakes of saturated, monounsaturated and polyunsaturated fat (as a percentage of dietary energy). There was no difference in energy or protein intake, and P/S ratio among the three groups. BMI was strongly positively correlated with total fat, saturated, monounsaturated, polyunsaturated fat, cholesterol, and protein intake (as g/day only), and negatively correlated with carbohydrate intake and the CHO/FAT ratio. Energy intake was not significantly associated with BMI.
A high fat diet may promote obesity, independently of its calorie contribution.
过量的膳食脂肪被认为与肥胖的病因有关。
本研究调查了三个体重组的脂肪摄入量，正常体重组（20.0≤体重指数≤27.0）、中度肥胖组（27.1≤体重指数≤39.9）和重度肥胖组（体重指数≥40.0）。每组有50名受试者。使用详细的3天食物记录来收集营养数据。还收集了人体测量和社会人口学信息。
总体脂肪摄入量为89±42克/天，占总能量的37±10%。发现肥胖组的总脂肪（克/1000千卡）摄入量显著更高（p<0.05）。与正常体重受试者相比，中度和重度肥胖组的受试者摄入的脂肪和胆固醇显著更多，碳水化合物更少。与正常体重受试者相比，肥胖受试者的饱和脂肪、单不饱和脂肪和多不饱和脂肪摄入量（占膳食能量的百分比）也更高。三组之间的能量或蛋白质摄入量以及P/S比值没有差异。体重指数与总脂肪、饱和脂肪、单不饱和脂肪、多不饱和脂肪、胆固醇和蛋白质摄入量（仅以克/天计）呈强正相关，与碳水化合物摄入量和CHO/FAT比值呈负相关。能量摄入量与体重指数没有显著关联。
高脂肪饮食可能会促进肥胖，与其热量贡献无关。
