Document Detail

Reproducibility and relative validity of a food-frequency questionnaire among French adults and adolescents.
MedLine Citation:
PMID:  17882132     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: Our aim was to evaluate the reproducibility of a food-frequency questionnaire (FFQ) developed in a French population, and its validity against four 24-h dietary recalls (24-HRs).
METHODS: A total of 57 adults (aged 18-63), 17 adolescents (aged 14-18) and 20 children (aged 10-14) completed four 24-HRs (one per season) and two FFQs over a 1-year interval. Reproducibility of the FFQ was estimated by intraclass correlation coefficients (ICCs). The validity of FFQ was assessed by comparison with the four 24-HRs.
RESULTS: For most nutrients, the first FFQ measurements gave higher mean values than the second FFQ. The ICCs for nutrients ranged from 0.39 for total protein to 0.83 for alcohol. The ICCs were higher for food items consumed daily such as milk (0.80) or sugars and confectionery (0.65), and lower for rarely eaten food such as inner organs (0.11). Nutrient intakes as assessed by FFQs were higher than those from the 24-HRs, except for alcohol. The de-attenuated Pearson's correlation coefficient for nutrients varied from 0.25 (dietary fiber) to 0.90 (alcohol), but the adjustment for energy did not improve these coefficients. When nutrient intakes were categorized into quintiles, FFQ and 24-HRs produced agreement rates (same or adjacent quintile) between 55% (for PUFA) and 95% (for alcohol), while misclassification to an extreme quintile was rare (<5%).
CONCLUSION: The FFQ developed for the FLVS II Study can be used to classify adults or adolescents according to their nutrients and food intakes over a 1-year period.
V Deschamps; B de Lauzon-Guillain; L Lafay; J-M Borys; M A Charles; M Romon
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Validation Studies     Date:  2007-09-19
Journal Detail:
Title:  European journal of clinical nutrition     Volume:  63     ISSN:  1476-5640     ISO Abbreviation:  Eur J Clin Nutr     Publication Date:  2009 Feb 
Date Detail:
Created Date:  2009-02-04     Completed Date:  2009-04-16     Revised Date:  2013-06-06    
Medline Journal Info:
Nlm Unique ID:  8804070     Medline TA:  Eur J Clin Nutr     Country:  England    
Other Details:
Languages:  eng     Pagination:  282-91     Citation Subset:  IM    
INSERM, Unit 780, Villejuif, France.
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MeSH Terms
Diet* / statistics & numerical data
Diet Records
Diet Surveys
Energy Intake
Middle Aged
Reproducibility of Results
Young Adult

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