The reliability and validity of a short food frequency questionnaire among 9-11-year olds: a multinational study on three middle-income and high-income countries.
T SaloheimoS A GonzálezM ErkkolaD M MilauskasJ D MeiselC M ChampagneC Tudor-LockeO SarmientoP T KatzmarzykM FogelholmPublished in: International journal of obesity supplements (2015)
I-FFQ is a moderately reliable method and its validity ranged from low to moderate, depending on food group and country site.