Nutritional Sciences Division, King's College London, London, UK.
Eur J Clin Nutr. 2011 Mar;65(3):402-8. doi: 10.1038/ejcn.2010.272. Epub 2010 Dec 22.
Inulin and oligofructose are prebiotic carbohydrates associated with numerous health benefits. The aim of this study was to accurately measure inulin and oligofructose intakes and to develop and validate a food frequency questionnaire (FFQ).
A 7-d semi-weighed food diary (FD) was used to measure intakes in 66 healthy subjects. A 23-item FFQ was developed to measure short-term inulin and oligofructose intakes over the same 7 days and was completed twice on 2 separate days.
There were no significant differences in inulin intake (4.0 ± 1.3 vs 4.0 ± 1.4 g/d, P = 0.646) or oligofructose intake (3.8 ± 1.2 vs 3.8 ± 1.3 g/d, P = 0.864) when measured using the 7-d FD or the FFQ. Bland-Altman analysis demonstrated low mean differences between the FD and FFQ in measuring intakes of inulin (-0.09 g/d) and oligofructose (-0.03 g/d). The FFQ categorised 89% of subjects into the same or adjacent tertiles of intakes as the 7-d FD. For the majority of food items, kappa values indicated 'substantial' or 'almost perfect' agreement for assignment of 'portion size' and 'frequency of consumption' between the FFQs completed on separate days.
The FFQ is a valid and reliable method for measuring short-term inulin and oligofructose intakes for use in dietary surveys and clinical trials.
菊粉和低聚果糖是与许多健康益处相关的益生元碳水化合物。本研究的目的是准确测量菊粉和低聚果糖的摄入量，并开发和验证一种食物频率问卷（FFQ）。
使用 7 天半称重食物日记（FD）来测量 66 名健康受试者的摄入量。开发了一个 23 项的 FFQ，用于在相同的 7 天内测量短期菊粉和低聚果糖的摄入量，并在 2 个不同的日子完成两次。
使用 7 天 FD 或 FFQ 测量时，菊粉摄入量（4.0 ± 1.3 与 4.0 ± 1.4 g/d，P = 0.646）或低聚果糖摄入量（3.8 ± 1.2 与 3.8 ± 1.3 g/d，P = 0.864）均无显著差异。Bland-Altman 分析表明，FD 和 FFQ 在测量菊粉（-0.09 g/d）和低聚果糖（-0.03 g/d）摄入量方面的平均差异较小。FFQ 将 89%的受试者归入与 7 天 FD 相同或相邻的摄入量三分位组。对于大多数食物，FFQ 两次完成的“食物份量”和“食用频率”的赋值kappa 值表明具有“高度”或“几乎完美”的一致性。
FFQ 是一种用于测量短期菊粉和低聚果糖摄入量的有效且可靠的方法，可用于饮食调查和临床试验。
