Using the method of triads in the validation of a food frequency questionnaire to assess the consumption of fatty acids in adults

作者：da Silva D C G^*; Segheto W; de Lima M F C; Pessoa M C; Peluzio M C G; Marchioni D M L; Cunha D B; Longo G Z

来源：Journal of Human Nutrition and Dietetics, 2018, 31(1): 85-95.

DOI：10.1111/jhn.12497

• fatty acids
• method of triads
• validation

BackgroundIt 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.
MethodsThe present study enrolled 152 Brazilian adults of both sexes, who were residents in the city of Vicosa, 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.
ResultsThe 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.
ConclusionsAccording to the validation coefficients, the FFQ precisely estimated total fat, linolenic acid and linoleic acid contents.

• 出版日期2018-2