Cited by 47Nutritional Studies and DietNutrition and Health StudiesStatistical Methods in Epidemiology

Relative validity and reproducibility of a quantitative FFQ for assessing nutrient intakes of vegetarians in Taiwan

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Chiu, Tina HT, Huang, Hui-Ya, Chen, Kuan-Ju, Wu, Yu-Ru, Chiu, Jason PC, Li, Yi-Hwei, Chiu, Brian C-H, Lin, Chin-Lon +1 more·2014·Public Health Nutrition

Abstract

Objective: To assess the relative validity and reproducibility of the quantitative FFQ used in the Tzu Chi Health Study (TCHS). Design: The reproducibility was evaluated by comparing the baseline FFQ with the 2-year follow-up FFQ. The validity was evaluated by comparing the baseline FFQ with 3 d dietary records and biomarkers (serum folate and vitamin B 12). Median comparison, cross-classification and Spearman correlation with and without energy adjustment and deattenuation for day-to-day variation were assessed. Setting: TCHS is a prospective cohort containing a high proportion of true vegetarians and part-time vegetarians (regularly consuming a vegetarian diet without completely avoiding meat). Subject: Subsets of 103, seventy-eight and 1528 TCHS participants were included in the reproducibility, dietary record-validity and biomarker-validity studies, respectively. Results: Correlations assessing the reproducibility for repeat administrations of the FFQ were in the range of 0·46–0·65 for macronutrients and 0·35–0·67 for micronutrients; the average same quartile agreement was 40%. The correlation between FFQ and biomarkers was 0·41 for both vitamin B 12 and folate. Moderate to good correlations between the baseline FFQ and dietary records were found for energy, protein, carbohydrate, saturated and monounsaturated fat, fibre, vitamin C, vitamin A, K, Ca, Mg, P, Fe and Zn (average crude correlation: 0·47 (range: 0·37–0·66); average energy-adjusted correlation: 0·43 (range: 0·38–0·55); average energy-adjusted deattenuated correlation: 0·50 (range: 0·44–0·66)) with same quartile agreement rate of 39% (range: 35–45%), while misclassification to the extreme quartile was rare (average: 4% (range: 0–6%)). Conclusions: The FFQ is a reliable and valid tool to rank relative intake of major nutrients for TCHS participants.

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  1. Yang Y, He M & Pan X (2004) China Food Composition 2004. Beijing: Peking University Medical Press.
  2. Willett W & Stampfer M (2013) Implications of total energy intake for epidemiologic analysis. In Nutritional Epide- miology, 3rd ed., pp. 260-286 [
  3. Willett W (2013) Correction for the effects of measurement error. In: Nutritional Epidemiology, 3rd ed., pp. 287-304 [
  4. Willett W & Lenart E (2013) Reproducibility and validity of food-frequency questionnaires. In Nutritional Epidemiology, 3rd ed. pp. 96-141 [

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Authors
Chiu, T. H., Huang, H.-Y., Chen, K.-J., Wu, Y.-R., Chiu, J. P., Li, Y.-H., Chiu, B. C.-H., Lin, C.-L., & Lin, M.-N.
Affiliations
  • Tzu Chi Foundation (TW)
  • Chung Hwa University of Medical Technology (TW)
  • Dalin Tzu Chi Hospital (TW)
  • University of British Columbia (CA)
  • Tzu Chi University (TW)
  • University of Chicago (US)
Corresponding author
Lin, Ming-Nan
Venue
Public Health Nutrition
Published
2013-06-20
Volume
17
Issue
7
Pages
1459-1466
ISSN
  • 1368-9800 (ISSN-L)
  • 1475-2727
OpenAlex
W2321550677
Cited by
47
References
27
Citations by year
2026: 4 · 2025: 3 · 2024: 5 · 2023: 6 · 2022: 6 · 2021: 2 · 2020: 5 · 2019: 4 · 2018: 6 · 2017: 2 · 2014: 4
FWCI
1.36
Type
journal article
Language
en
Open access
Locations
  • Public Health Nutrition (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Nutritional Studies and Diet
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Nutrition and Health Studies
  • Physical Sciences › Mathematics › Statistics and Probability › Statistical Methods in Epidemiology
Keywords
food frequency questionnaire, dietary assessment validity, reproducibility, vegetarians, dietary records, serum folate, vitamin B12, nutrient intake, energy adjustment, day-to-day variability, micronutrient intake
MeSH terms
Adult, Aged, Diet Surveys, Feeding Behavior, Female, Humans, Male, Middle Aged, Nutritive Value, Prospective Studies, Surveys and Questionnaires, Taiwan, Diet, Vegetarian, Reproducibility of Results, Biomarkers, Nutrition Assessment, Diet Records

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