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Validity of a self-administered food frequency questionnaire used in the 5-year follow-up survey of the JPHC Study Cohort I to assess dietary fiber intake: comparison with dietary records.
MedLine Citation:
PMID:  12701638     Owner:  NLM     Status:  MEDLINE    
We examined the validity of a food frequency questionnaire (FFQ) used in the 5-year follow-up survey of the JPHC study for estimation of dietary fiber intake by comparing the intake estimated with dietary records (DR). We developed a food composition table for dietary fiber for the food items included in the FFQ using a substitution method. The Spearman correlation coefficients were slightly higher in crude values (0.48-0.51 in men, 0.40-0.45 in women) than in energy-adjusted values (0.43-0.44 in men, 0.36-0.40 in women). The correlation coefficients of food group-specific dietary fiber (crude) were 0.26 and 0.27 for vegetables, and 0.62 and 0.49 for fruits in men and women, respectively. The mean intakes assessed with the FFQ and DR were not statistically different either for water-soluble or -insoluble fiber in both men and women. However, the fruit fiber assessed with FFQ was significantly over- and the vegetable fiber was underestimated compared with those assessed with DRs. The FFQ can be used for ranking individuals for dietary fiber intakes in epidemiologic studies, despite the difficulty in estimating mean intake.
Satoshi Sasaki; Yasuhiro Matsumura; Junko Ishihara; Shoichiro Tsugane;
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Publication Detail:
Type:  Journal Article; Multicenter Study; Validation Studies    
Journal Detail:
Title:  Journal of epidemiology / Japan Epidemiological Association     Volume:  13     ISSN:  0917-5040     ISO Abbreviation:  J Epidemiol     Publication Date:  2003 Jan 
Date Detail:
Created Date:  2003-04-18     Completed Date:  2003-05-15     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  9607688     Medline TA:  J Epidemiol     Country:  Japan    
Other Details:
Languages:  eng     Pagination:  S106-14     Citation Subset:  IM    
Epidemiology and Biostatistics Division, National Cancer Center Research Institute East, Kashiwa, Chiba, Japan.
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MeSH Terms
Analysis of Variance
Diet Records
Diet Surveys*
Dietary Fiber*
Food Habits*
Reproducibility of Results
Sex Factors
Statistics, Nonparametric

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