Whybrow S, Horgan G, Stubbs R J
Rowett Research Institute, Bucksburn, Aberdeen, UK.
Eur J Clin Nutr. 2008 Sep;62(9):1148-50. doi: 10.1038/sj.ejcn.1602826. Epub 2007 May 30.
Three-day, rather than 7-day, food records are frequently used because mis-reporting of food intake is believed to increase with recording period. Data from the National Diet and Nutrition Survey of adults were used to explore trends in reported energy intake (REI) with day of recording and to compare average REIs from Thursday to Saturday and from Sunday to Tuesday to the complete 7-day record. Although REIs decreased from days 2 to 7, this was by a quantitatively insignificant 49 kJ per day (P=0.026) and well within the measurement error of recorded food intakes. Furthermore, REIs were lowest on the first recording day. The 3- and 7-day averages were similar (mean difference 0.039 (s.d.+/-1.0) MJ (NS), range -3.3 to +4.2 MJ). However, the difference was greater for those reporting higher than average energy intakes because of higher REIs on weekend days. Food intake reporting periods of longer than 3 days and ideally 7 days are preferable.
人们经常使用为期三天而非七天的食物记录，因为据信食物摄入量的误报会随着记录期的延长而增加。利用成人国民饮食与营养调查的数据，探讨报告能量摄入量（REI）随记录日的变化趋势，并将周四至周六以及周日至周二的平均REI与完整的七天记录进行比较。尽管从第2天到第7天REI有所下降，但每天下降49千焦，在数量上不显著（P = 0.026），且完全在记录食物摄入量的测量误差范围内。此外，第一天记录时REI最低。三天和七天的平均值相似（平均差值0.039（标准差±1.0）兆焦（无显著性差异），范围为-3.3至+4.2兆焦）。然而，对于那些因周末REI较高而报告能量摄入量高于平均水平的人来说，差异更大。食物摄入量报告期超过三天，理想情况下为七天更佳。
