Martin L J, Su W, Jones P J, Lockwood G A, Tritchler D L, Boyd N F
Division of Epidemiology and Statistics, Ontario Cancer Institute, Toronto, Canada.
Am J Clin Nutr. 1996 Apr;63(4):483-90. doi: 10.1093/ajcn/63.4.483.
The accuracy of estimates of usual energy intake derived from food records in participants of a long-term dietary-intervention trial was studied in a subset of 29 women aged 48.7+/-5.0 y and weighing 61.9+/-6.5 kg. This sample was similar to the population in the whole trial (n=715), from which it was selected in terms of age, weight, body mass index (BMI), and reported energy and fat intakes. During the validation study, reported energy intake was derived from 7 consecutive days of food records, and total energy expenditure was measured by the doubly labeled water method over 13 d. Reported energy intake (6.98+/-1.58 MJ/d) was significantly lower than energy expenditure (9.00+/-2.08MJ/d) and represented 79.8+/-17.6% of expenditure. The correlation between reported energy intake and expenditure was 0.46 (P=0.01, 95% CI: 0.15, 0.71). Body weight, BMI, height, length of time in the dietary trial, and percentage of energy from fat and carbohydrate were not significantly associated with the accuracy of reporting. These results indicate that energy intake derived from food records is an imprecise measure that substantially underestimates energy intake in middle-aged women participating in a long-term dietary-intervention trial.
在一项长期饮食干预试验的参与者中，对通过食物记录得出的通常能量摄入量估计值的准确性进行了研究。研究对象为29名年龄48.7±5.0岁、体重61.9±6.5千克的女性。该样本在年龄、体重、体重指数（BMI）以及报告的能量和脂肪摄入量方面与整个试验中的人群（n = 715）相似，是从其中选取的。在验证研究期间，报告的能量摄入量来自连续7天的食物记录，总能量消耗通过双标水法在13天内进行测量。报告的能量摄入量（6.98±1.58兆焦/天）显著低于能量消耗（9.00±2.08兆焦/天），占消耗量的79.8±17.6%。报告的能量摄入量与消耗量之间的相关性为0.46（P = 0.01，95%CI：0.15，0.71）。体重、BMI、身高、饮食试验的时间长度以及来自脂肪和碳水化合物的能量百分比与报告的准确性无显著关联。这些结果表明，通过食物记录得出的能量摄入量是一种不精确的测量方法，在参与长期饮食干预试验的中年女性中会大幅低估能量摄入量。
