Hollis Jenna L, Craig Leone Ca, Whybrow Stephen, Clark Heather, Kyle Janet Am, McNeill Geraldine
1Rowett Institute of Nutrition and Health,University of Aberdeen,Foresterhill Campus,Aberdeen AB25 2ZD,UK.
2Institute of Applied Health Sciences,University of Aberdeen,Aberdeen,UK.
Public Health Nutr. 2017 Feb;20(3):449-455. doi: 10.1017/S1368980016002421. Epub 2016 Sep 13.
To assess the relative validity of the latest version of the Scottish Collaborative Group (SCG) FFQ (version 6.6) in adults living in Scotland.
A cross-sectional validation study. Participants completed the self-administered, 169-item SCG FFQ followed by a 7 d, non-weighed food diary. Energy and energy-adjusted macronutrients and micronutrients were examined for relative validity through Spearman's correlation, the percentage of classification into thirds of intake, Cohen's weighted kappa (κ w) and Bland-Altman analysis.
General population living in Scotland.
Ninety-six adults aged 18-65 years.
Spearman's correlation coefficients ranged from 0·21 (retinol) to 0·71 (Mg). A median of 52 % of adults were correctly classified into thirds of intake (range: 42 % (PUFA, MUFA and Fe) to 64 % (percentage energy from carbohydrates)) and 8 % were grossly misclassified into opposite thirds of intake (range: 3 % (carbohydrates, percentage energy from carbohydrates) to 19 % (thiamin)). Values of κ w ranged between 0·20 (PUFA, β-carotene) to 0·55 (percentage energy from carbohydrates). In the Bland-Altman analysis, the smallest limits of agreement, when expressed as a percentage of the mean intake from the FFQ and food diary, were seen for the main macronutrients carbohydrates, fat and protein.
As in the previous validation study more than 10 years ago, the FFQ gave higher estimates of energy and most nutrients than the food diary, but after adjustment for energy intake the FFQ could be used in place of non-weighed food diaries for most macronutrients and many micronutrients in large-scale epidemiological studies.
评估最新版苏格兰协作组（SCG）食物频率问卷（FFQ，6.6版）在居住于苏格兰的成年人中的相对效度。
一项横断面效度研究。参与者完成一份169项的自填式SCG FFQ，随后记录一份为期7天的非称重食物日记。通过Spearman相关性分析、摄入量三分位数分类百分比、Cohen加权kappa（κw）以及Bland-Altman分析，对能量、能量调整后的常量营养素和微量营养素的相对效度进行检验。
居住于苏格兰的普通人群。
96名年龄在18至65岁之间的成年人。
Spearman相关系数范围为0.21（视黄醇）至0.71（镁）。中位数为52%的成年人摄入量被正确分类到三分位数中（范围：42%（多不饱和脂肪酸、单不饱和脂肪酸和铁）至64%（碳水化合物提供的能量百分比）），8%的人被严重错误分类到摄入量的相反三分位数中（范围：3%（碳水化合物、碳水化合物提供的能量百分比）至19%（硫胺素））。κw值范围在0.20（多不饱和脂肪酸、β-胡萝卜素）至0.55（碳水化合物提供的能量百分比）之间。在Bland-Altman分析中，以FFQ和食物日记平均摄入量的百分比表示时，主要常量营养素碳水化合物、脂肪和蛋白质的一致性界限最小。
与10多年前的上一次效度研究一样，FFQ对能量和大多数营养素的估计高于食物日记，但在调整能量摄入量后，FFQ可在大规模流行病学研究中用于替代大多数常量营养素和许多微量营养素的非称重食物日记。
