Ma Yunsheng, Olendzki Barbara C, Pagoto Sherry L, Hurley Thomas G, Magner Robert P, Ockene Ira S, Schneider Kristin L, Merriam Philip A, Hébert James R
Division of Preventive and Behavioral Medicine, Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01655, USA.
Ann Epidemiol. 2009 Aug;19(8):553-9. doi: 10.1016/j.annepidem.2009.04.010.
Twenty-four-hour diet recall interviews (24HRs) are used to assess diet and to validate other diet assessment instruments. Therefore it is important to know how many 24HRs are required to describe an individual's intake.
Seventy-nine middle-aged white women completed seven 24HRs over a 14-day period, during which energy expenditure (EE) was determined by the doubly labeled water method (DLW). Mean daily intakes were compared to DLW-derived EE using paired t tests. Linear mixed models were used to evaluate the effect of call sequence and day of the week on 24HR-derived energy intake while adjusting for education, relative body weight, social desirability, and an interaction between call sequence and social desirability.
Mean EE from DLW was 2115 kcal/day. Adjusted 24HR-derived energy intake was lowest at call 1 (1501 kcal/day); significantly higher energy intake was observed at calls 2 and 3 (2246 and 2315 kcal/day, respectively). Energy intake on Friday was significantly lower than on Sunday. Averaging energy intake from the first two calls better approximated true energy expenditure than did the first call, and averaging the first three calls further improved the estimate (p=0.02 for both comparisons). Additional calls did not improve estimation.
Energy intake is underreported on the first 24HR. Three 24HRs appear optimal for estimating energy intake.
24小时饮食回顾访谈（24HRs）用于评估饮食并验证其他饮食评估工具。因此，了解需要多少次24HRs才能描述个体摄入量很重要。
79名中年白人女性在14天内完成了7次24HRs，在此期间，通过双标水法（DLW）测定能量消耗（EE）。使用配对t检验将每日平均摄入量与DLW得出的EE进行比较。在调整教育程度、相对体重、社会期望以及访谈顺序与社会期望之间的相互作用后，使用线性混合模型评估访谈顺序和星期几对24HRs得出的能量摄入量的影响。
DLW得出的平均EE为2115千卡/天。在第一次访谈时，调整后的24HRs得出的能量摄入量最低（1501千卡/天）；在第二次和第三次访谈时观察到能量摄入量显著更高（分别为2246和2315千卡/天）。周五的能量摄入量显著低于周日。将前两次访谈的能量摄入量平均比第一次访谈更接近真实能量消耗，将前三次访谈的能量摄入量平均进一步改善了估计值（两次比较的p值均为0.02）。额外的访谈并未改善估计效果。
在第一次24HRs中能量摄入量报告不足。三次24HRs似乎是估计能量摄入量的最佳次数。
