Document Detail

Reproducibility of a food frequency questionnaire for adolescents.
MedLine Citation:
PMID:  17700953     Owner:  NLM     Status:  MEDLINE    
To assess the reproducibility of a validated 76-item food frequency questionnaire designed to estimate diet in adolescents (Adolescent Food Frequency Questionnaire--AFFQ) in the city of Sao Paulo, Brazil, a test-retest study was conducted (n = 49). Intraclass correlation coefficient (ICC), weighted kappa, and percentage of agreement were used in both crude and energy-adjusted nutrient intakes. Bland Altman plots were used to examine the limits of agreement for energy and macronutrients. The ICC ranged from 0.48 (carbohydrates) to 0.65 (vitamin C) in crude values and from 0.25 (total fat) to 0.58 (vitamin C) in adjusted values. Kappa values ranged from 0.28 (protein and fiber) to 0.56 (unsaturated fat). Bland Altman showed a trend towards larger difference in energy according to increased intake values and a bias towards extreme values for fat intake. The percent of individuals classified in the same category on the two occasions was on average 54.2%. By conclusion, the Adolescent Food Frequency Questionnaire showed reasonable reproducibility and can be used in studies that aim to classify groups into intake categories.
Dirce Maria Lobo Marchioni; Silvia Maria Voci; Flávia Emília Leite de Lima; Regina Mara Fisberg; Betzabeth Slater
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Publication Detail:
Type:  Journal Article; Validation Studies    
Journal Detail:
Title:  Cadernos de saúde pública     Volume:  23     ISSN:  0102-311X     ISO Abbreviation:  Cad Saude Publica     Publication Date:  2007 Sep 
Date Detail:
Created Date:  2007-08-16     Completed Date:  2008-06-17     Revised Date:  2013-03-18    
Medline Journal Info:
Nlm Unique ID:  8901573     Medline TA:  Cad Saude Publica     Country:  Brazil    
Other Details:
Languages:  eng     Pagination:  2187-96     Citation Subset:  IM    
Faculdade de Saúde Pública, Universidade de São Paulo, São Paulo, Brasil.
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MeSH Terms
Adolescent Behavior
Diet Records
Energy Intake
Feeding Behavior*
Questionnaires / standards*
Reproducibility of Results

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