Validation of a food-frequency questionnaire for cohort studies in rural Japan

Keiko Ogawa, Yoshitaka Tsubono, Yoshikazu Nishino, Yoko Watanabe, Takayoshi Ohkubo, Takao Watanabe, Haruo Nakatsuka, Nobuko Takahashi, Mieko Kawamura, Ichiro Tsuji, Shigeru Hisamichi

Research output: Contribution to journalArticlepeer-review

123 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)147-157
Number of pages11
JournalPublic Health Nutrition
Issue number2
Publication statusPublished - 2003 Apr


  • Food frequency questionnaire
  • Reproducibility
  • Validity

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Nutrition and Dietetics
  • Public Health, Environmental and Occupational Health


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