title: Validation of a quantitative food frequency questionnaire developed to under graduate students.
abstract: A validity test of a Food Frequency Questionnaire was carried out using 50 students of health occupation in São Paulo, Brazil. Therefore, a three day dietary record was used as reference method and variables such as energy, macronutrients and dietary fiber were analyzed. The accordance between the Food Frequency Questionnaire and average data from dietary record was tested with kappa statistics and intra-class correlation coefficients (ICC). Limits of agreement were estimated by the Bland-Altman's method. Better results were found for calories (ICC 0.43; 95%CI 0.17 - 0.63) and non-energy-adjusted nutrients, except dietary fiber (ICC 0.34; 95%CI 0.07 - 0.56). The percentage of individuals classified in the same category of consumption was nearly half (49.8%), while only 16% of them were classified in opposite categories. With the exception of lipids, other analyzed variables tended to be overestimated by the Food Frequency Questionnaire. The Food Frequency Questionnaire is recommended as a method of assessing food intake of university students in studies which focus on calorie estimates and also intend to classify groups into intake categories.
authors.affiliation: Department of Preventive Medicine, Paulista Medicine School, Sao Paulo, SP, Brazil.
authors.forename: Tiemy Rosana
authors.initials: TR
authors.lastname: Komatsu
authors.affiliation: Department of Preventive Medicine, Paulista Medicine School, Sao Paulo, SP, Brazil.
authors.forename: Simone Kimie
authors.initials: SK
authors.lastname: Oku
authors.affiliation: Department of Preventive Medicine, Paulista Medicine School, Sao Paulo, SP, Brazil.
authors.forename: Suely Godoy Agostinho
authors.initials: SG
authors.lastname: Gimeno
authors.affiliation: Nutrition School, Universidade Federal de Alagoas, Maceio, AL, Brazil.
authors.forename: Leiko
authors.initials: L
authors.lastname: Asakura
authors.affiliation: Department of Preventive Medicine, Paulista Medicine School, Sao Paulo, SP, Brazil.
authors.forename: Luciola de Castro
authors.initials: Lde C
authors.lastname: Coelho
authors.affiliation: Gynecology Institute, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
authors.forename: Clarissa Viana Demezio da
authors.initials: CV
authors.lastname: Silva
authors.affiliation: Department of Nutrition, Universidade de Brasilia, Brasilia, DF, Brazil.
authors.forename: Rita de Cassia Coelho Almeida
authors.initials: Rde C
authors.lastname: Akutsu
authors.affiliation: Department of Preventive Medicine, Paulista Medicine School, Sao Paulo, SP, Brazil.
authors.forename: Anita
authors.initials: A
authors.lastname: Sachs
mesh_terms: D015930:Diet Records; D005260:Female; D006801:Humans; D008297:Male; D013334:Students; D011795:Surveys and Questionnaires; D014495:Universities