Champagne Catherine M, Bray George A, Kurtz April A, Monteiro Josefina Bressan Resende, Tucker Elizabeth, Volaufova Julia, Delany James P
Pennington Biomedical Research Center, Baton Rouge, LA 70808-4124, USA.
J Am Diet Assoc. 2002 Oct;102(10):1428-32. doi: 10.1016/s0002-8223(02)90316-0.
Underreporting of food intake has been commonly observed. We hypothesized that experience with recording dietary information might increase the accuracy of the records. To test this hypothesis, we compared energy intake and energy expenditure in dietitians-who are experienced in recording food intake-with those of non-dietitians, whose only exposure to training to record food was in the context of this trial.
SUBJECTS/SETTING: Subjects for this study were 10 female registered dietitians and 10 women of comparable age and weight who were not dietitians.
This study compared the energy intake obtained from 7-day food records with energy expenditure measured over the corresponding 7-day period using doubly labeled water.
Data were compared by an analysis of variance
All subjects were trained to provide a 7-day weighed food intake record. Energy expenditure was measured with doubly labeled water over the 7 days when the weighed food intake record was obtained. A total of 10 dietitians and a control of group of 10 women of similar age and weight were recruited for this study. Participants were told that the goal was to record food intake as accurately as possible, because it would be compared with the simultaneous measurement of energy expenditure determined by doubly labeled water.
The energy expenditure of the dietitians and controls were not different (2,154+/-105 [mean+/- standard error of the mean] kcal/day for dietitians and 2,315 +/- 90 kcal/ day for controls). The dietitians underreported their energy intake obtained from the food records by an average of 223 +/- 116 kcal/day, which was not different from their energy expenditure. Participants in the control group, as hypothesized, significantly underreported their energy intake (429 +/- 142 kcal/day, P < .05).
Dietitians estimated their energy intake more accurately than non-dietitians, suggesting that familiarity with and interest in keeping food records may lead to more reliable estimates of energy intake.
食物摄入量报告不足的情况普遍存在。我们推测，记录饮食信息的经验可能会提高记录的准确性。为了验证这一假设，我们比较了有记录食物摄入量经验的营养师与非营养师的能量摄入和能量消耗情况，非营养师仅在本试验中接受过记录食物的培训。
受试者/研究背景：本研究的受试者为10名女性注册营养师以及10名年龄和体重相仿的非营养师女性。
本研究将7天食物记录所获得的能量摄入与使用双标水法在相应7天内测量的能量消耗进行了比较。
数据采用方差分析进行比较。
所有受试者均接受培训，以提供一份7天的食物摄入量称重记录。在获取称重食物摄入量记录的7天内，用双标水法测量能量消耗。本研究共招募了10名营养师以及一组由10名年龄和体重相仿的女性组成的对照组。参与者被告知目标是尽可能准确地记录食物摄入量，因为这将与通过双标水法同时测量的能量消耗进行比较。
营养师和对照组的能量消耗没有差异（营养师为2154±105[均值±均值标准误]千卡/天，对照组为2315±90千卡/天）。营养师从食物记录中上报的能量摄入量平均比实际少223±116千卡/天，这与他们的能量消耗没有差异。正如所假设的，对照组的参与者显著少报了他们的能量摄入量（429±142千卡/天，P<.05）。
营养师比非营养师更准确地估计了他们的能量摄入量，这表明对记录食物摄入量的熟悉程度和兴趣可能会使能量摄入量的估计更可靠。
