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Validity of the self-administered food frequency questionnaire used in the 5-year follow-up survey of the JPHC Study Cohort I: comparison with dietary records for main nutrients.
MedLine Citation:
PMID:  12701631     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
We examined the validity of energy and 16 nutrient intake measurements from a self-administered food frequency questionnaire (FFQ) used in the 5-year follow-up survey of the JPHC study using 28- or 14-day dietary records (DR) as the gold standard. The median (range) correlation coefficients between 16 nutrients measured by FFQ and DR were 0.52 (0.31-0.81) for men and 0.41 (0.22-0.56) for women. The median (range) for energy-adjusted correlation coefficients was 0.40 (0.22-0.82) for men and 0.39 (0.15-0.48) for women. With further adjustment for area, it was 0.41 and 0.35, respectively. The mean percentage of classification into the same categories between the two methods was 33% in men and 30% in women. Only 2% of subjects were classified into the extreme opposite categories. In conclusion, the results suggest that the FFQ can be used in the JPHC Study Cohort I to rank individuals according to the intakes for most of the nutrients examined.
Authors:
Shoichiro Tsugane; Minatsu Kobayashi; Satoshi Sasaki;
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:  S51-6     Citation Subset:  IM    
Affiliation:
Epidemiology and Biostatistics Division, National Cancer Center Research Institute East, Kashiwa, Chiba, Japan.
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MeSH Terms
Descriptor/Qualifier:
Diet Records
Diet Surveys*
Female
Food Habits*
Humans
Japan
Male
Questionnaires*
Reproducibility of Results
Sex Factors
Statistics, Nonparametric

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