Vega-Salas MJ, Curi-Quinto K, Hidalgo-Aréstegui A, Meza-Carbajal K, Lago-Berrocal N, Arias L, Favara M, Penny M, Sánchez A and Vimaleswaran KS (2022). Development of an online food frequency questionnaire and estimation of misreporting of energy intake during the COVID-19 pandemic among young adults in Peru. Frontiers in Nutrition, 9.

This study aims to describe the multi-stage process used to adapt a previously validated face-to-face Food Frequency Questionnaries (FFQ) of an online self-administered FFQ for young adults in Peru during the pandemic, including the selection of the food items, portion sizes, and food frequency response options. Furthermore, it aims at validating the FFQ by estimating the proportion and characteristics of misreporting of energy intakes (EI) in this population and assessing the internal reliability of the online FFQ using Cronbach’s alpha test. Findings from this study are expected to inform the measurement of usual dietary intake in the Young Lives Study cohort in Peru. In addition, the tool designed can be a good alternative to develop nutritional studies with large coverage at a low cost in the context of developing countries.