Relative validity of a food frequency questionnaire in patients coinfected with hepatitis C virus and human immunodeficiency virus

AUTOR(ES)

Zanolla, Anelise Fernanda, Buss, Caroline, Kliemann, Dimas Alexandre, Pinto, Giselle Souza, Vasques, Vivian Silveira, Tovo, Cristiane Valle

FONTE

Rev. Soc. Bras. Med. Trop.

DATA DE PUBLICAÇÃO

2017-02

RESUMO

ABSTRACT INTRODUCTION: Validation of food frequency questionnaires (FFQs) is recommended for accurate measurement of habitual food consumption. We assessed the relative validity of a FFQ in patients coinfected with hepatitis C virus and human immunodeficiency virus. METHODS: Each patient responded to a FFQ and three 24-hour food recalls. Pearson’s correlation and weighted Kappa index analyses were performed to identify the FFQ relative validity and concordance. RESULTS: De-attenuated correlation coefficients ranged from 0.35 (vitamin B1) to 0.81 (selenium). The concordance index ranged from 0.07 (vitamin C) to 0.51 (calcium). CONCLUSIONS: The FFQ showed satisfactory relative validity for most nutrients.

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