Document Detail

Validation of a food-frequency questionnaire for cohort studies in rural Japan.
MedLine Citation:
PMID:  12675957     Owner:  NLM     Status:  MEDLINE    
OBJECTIVES: To examine the validity and reproducibility of a self-administered food-frequency questionnaire (FFQ) used for two cohort studies in Japan. DESIGN: Cross-sectional study. SETTING: Two rural towns in the Miyagi Prefecture, in north-eastern Japan. SUBJECTS: Fifty-five men and 58 women. RESULTS: A 40-item FFQ was administered twice, 1 year apart. In the mean time, four 3-day diet records (DRs) were collected in four seasons within the year. We calculated daily consumption of total energy and 15 nutrients, 40 food items and nine food groups from the FFQs and the DRs. We computed Spearman correlation coefficients between the FFQs and the DRs. With adjustment for age, total energy and deattenuation for measurement error with the DRs, the correlation coefficients for nutrient intakes ranged from 0.25 to 0.58 in men and from 0.30 to 0.69 in women, with median of 0.43 and 0.43, respectively. Median (range) of the correlation coefficients was 0.35 (-0.30 to 0.72) in men and 0.34 (-0.06 to 0.75) in women for food items and 0.60 (-0.10 to 0.76) and 0.51 (0.28-0.70) for food groups, respectively. Median (range) of the correlation coefficients for the two FFQs administered 1 year apart was 0.49 (0.31-0.71) in men and 0.50 (0.40-0.64) in women for nutrients, 0.43 (0.14-0.76) and 0.45 (0.06-0.74) respectively for food items, and 0.50 (0.30-0.70) and 0.57 (0.39-0.66) respectively for food groups. Relatively higher agreement percentages for intakes of nutrients and food groups with high validity were obtained together with lower complete disagreement percentages. CONCLUSIONS: The FFQ has a high reproducibility and a reasonably good validity, and is useful in assessing the usual intakes of nutrients, foods and food groups among a rural Japanese population.
Keiko Ogawa; Yoshitaka Tsubono; Yoshikazu Nishino; Yoko Watanabe; Takayoshi Ohkubo; Takao Watanabe; Haruo Nakatsuka; Nobuko Takahashi; Mieko Kawamura; Ichiro Tsuji; Shigeru Hisamichi
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Validation Studies    
Journal Detail:
Title:  Public health nutrition     Volume:  6     ISSN:  1368-9800     ISO Abbreviation:  Public Health Nutr     Publication Date:  2003 Apr 
Date Detail:
Created Date:  2003-04-04     Completed Date:  2003-10-30     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9808463     Medline TA:  Public Health Nutr     Country:  England    
Other Details:
Languages:  eng     Pagination:  147-57     Citation Subset:  IM    
Division of Epidemiology, Department of Public Health, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8575, Japan.
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MeSH Terms
Cohort Studies
Cross-Sectional Studies
Diet Records
Diet Surveys
Food Habits*
Middle Aged
Questionnaires / standards*
Reproducibility of Results
Rural Population
Sensitivity and Specificity
Statistics, Nonparametric

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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