Reproducibility, relative validity and calibration of a food frequency questionnaire for adults

Cadernos de Saúde Pública

Neuciani Ferreira Da Silva²  Rosely Sichieri¹  Rosângela Alves Pereira¹  Regina Maria Veras Gonçalves Da Silva¹  Márcia Gonçalves Ferreira¹ 

[1] ,Universidade Federal de Mato Grosso Instituto de Saúde Coletiva Cuiabá,Brasil

关键词: Reproducibility of Results;    Questionnaires;    Adult;    Reprodutibilidade dos Testes;    Questionários;    Adulto;    Reproducibilidad de Resultados;    Cuestionarios;    Adulto;   

DOI  :  10.1590/0102-311X00120312

来源: SciELO

【 摘 要 】

The purpose of the present study was to evaluate the reproducibility and relative validity and calibrate the dietary intake assessment of a food frequency questionnaire (FFQ) using a random sample of 195 adults aged 20 to 50 years from the Central-West Region of Brazil. The reference method used by the study was two 24-hour recalls (24hR) that provided energy-adjusted deattenuated food intake data for comparison purposes. With respect to reproducibility, the average weighted kappa was 0.43 and exact agreement was 41.5%. With regard to relative validity, correlation coefficients ranged from 0.32 (thiamin) to 0.51 (carbohydrates), with a mean of 0.41. Deattenuation and adjustment for energy intake decreased most correlation coefficients in relation to crude values. The food frequency questionnaire showed good reliability and moderate validity for most nutrients based on classification into quartiles of energy and nutrient intake. The calibrated means of the FFQ were more similar to the means estimated from the 24hR and showed lower standard deviation.

【 授权许可】

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