采用三联体法验证食物频率问卷评估成年人脂肪酸摄入量。
Using the method of triads in the validation of a food frequency questionnaire to assess the consumption of fatty acids in adults.
机构信息
Department of Nutrition and Health, Federal University of Viçosa, Viçosa, Brazil.
Nursing Department, Federal University of Minas Gerais, Belo Horizonte, Brazil.
出版信息
J Hum Nutr Diet. 2018 Feb;31(1):85-95. doi: 10.1111/jhn.12497. Epub 2017 Jul 26.
BACKGROUND
It is of great value to develop valid instruments to estimate food consumption; for this purpose, the triads method has been applied in validation studies of dietary intake to evaluate the correlation between three measurements [food frequency questionnaire (FFQ), reference method and biomarker]. The main aim of the present study was to validate a FFQ for Brazilian adults by means of the method of triads by estimating the ingestion of total fatty acids based on the level of saturation.
METHODS
The present study enrolled 152 Brazilian adults of both sexes, who were residents in the city of Viçosa, Brazil. The ingestion of total saturated, monounsaturated, polyunsaturated, trans, linoleic and linolenic fatty acids was assessed by means of a FFQ, two food records, and biomarkers, which were detected by gas chromatography. The validation coefficients were calculated using the method of triads and concordance was determined by Kappa statistics.
RESULTS
The FFQ was considered an adequate dietary method, because, based on the validation coefficients, it estimates the intake of total fat (0.84), as well as linolenic (0.90) and linoleic acids (0.31). A high concordance rate was confirmed for all nutrients assessed by the FFQ and food records. Regarding the biomarkers, linolenic acid and linoleic acid presented greater concordance.
CONCLUSIONS
According to the validation coefficients, the FFQ precisely estimated total fat, linolenic acid and linoleic acid contents.
背景
开发有效的工具来评估食物的摄入量是非常有价值的。为此，三联法已被应用于饮食摄入的验证研究中，以评估三种测量方法（食物频率问卷[FFQ]、参考方法和生物标志物）之间的相关性。本研究的主要目的是通过三联法验证一种用于巴西成年人的 FFQ，方法是根据饱和度水平来估计总脂肪酸的摄入量。
方法
本研究纳入了 152 名居住在巴西维索萨市的巴西成年人，通过 FFQ、两份食物记录和通过气相色谱检测到的生物标志物来评估总饱和脂肪酸、单不饱和脂肪酸、多不饱和脂肪酸、反式脂肪酸、亚油酸和亚麻酸的摄入量。使用三联法计算验证系数，并通过 Kappa 统计确定一致性。
结果
FFQ 被认为是一种适当的膳食方法，因为根据验证系数，它可以估计总脂肪（0.84）以及亚麻酸（0.90）和亚油酸（0.31）的摄入量。FFQ 和食物记录评估的所有营养素均具有较高的一致性。关于生物标志物，亚麻酸和亚油酸具有更高的一致性。
结论
根据验证系数，FFQ 可以准确地估计总脂肪、亚麻酸和亚油酸的含量。
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