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Topical Area: Nutritional Epidemiology

Nutritional Epidemiology (I) (Poster Session)

(P19-017-23) Validity of Dietary Intake Measurement Assessed by a Food Frequency Questionnaire Among Chinese Adults

Sunday, July 23, 2023
11:45 AM – 12:45 PM ET
Location: Poster Board 114

    Presenting Author(s)

  • Yiying Gong, BM

    Zhejiang province, China
    Zhejiang University School of Medicine
    Hangzhou, Zhejiang, China (People's Republic)

    • Co-Author(s)

  • DZ

    Dong Zhao

    Department of Nutrition and Food Safety, Zhejiang Provincial Center for Disease Control and Prevention

  • Liyan Huang, Bachelor of Medicine

    Student
    Zhejiang University School of Medicine
    Hangzhou, Zhejiang, China (People's Republic)

  • RL

    Rongxia Lv

    Zhejiang University School of Medicine

  • CN

    Chunxiao Ni

    Zhejiang University School of Medicine

  • DZ

    Dafang Zhu

    Department of Nutrition and Food Safety, Zhejiang Provincial Center for Disease Control and Prevention

  • MY

    Min Yang

    Zhejiang University School of Medicine; National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention

  • RZ

    Ronghua Zhang

    Department of Nutrition and Food Safety, Zhejiang Provincial Center for Disease Control and Prevention

  • CY

    Changzheng Yuan, ScD

    School of Public Health, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou

Disclosure(s):
Yiying Gong, BM: No relevant financial relationship(s) with ineligible companies to disclose.
Liyan Huang, Bachelor of Medicine: No relevant financial relationship(s) with ineligible companies to disclose.


Objectives: This study aimed to evaluate the validity of a Food Frequency Questionnaire (FFQ) and different methods of constructing the FFQ Food Composition Table (FCT) in assessing dietary intakes of foods and nutrients among adult residents in Zhejiang, China.

Methods: A total of 2325 participants (aged 56.2±14.9, 51.6% female) from nine cities who completed a 66-item FFQ and 3-day 24-hour dietary recalls (24HRs) in 2015 were included. Eight FFQ FCTs were generated with various food items and specific weight estimated based on professional knowledge, representative 24HRs data, or the 2002 Chinese FCT (CFCT). Among these, the FFQ weighted FCT (WFCT) was constructed by selecting food items contributing to 80% of the total intake amounts and calculating specific weights in accordance to their constituent ratios for each food group based on the 24HRs data. The residual method and the energy density method were used for estimating the energy-adjusted level of dietary intakes. Spearman correlation coefficients (SCC) of intakes of 14 food groups and 17 nutrients between FFQ and 24HRs were calculated to evaluate the overall validity of FFQ.

Results: The average intakes of most food groups and nutrients assessed with FFQ were higher than those assessed by the 24HRs. For the food groups, the averaged energy-adjusted (residual method) SCC between FFQ and 24HRs was 0.27, ranging from 0.14 (starch-rich beans) to 0.49 (aquatic products). For nutrients calculated using the WFCT, the averaged energy-adjusted (residual method) SCC was 0.26, ranging from 0.16 (Iron) to 0.37 (Potassium).

Conclusions: The 66-item Chinese FFQ and a weighted FCT were reasonably valid to assess dietary intakes of foods and nutrients in Chinese adults.

Funding Sources: Special Foundation for National Science and Technology Basic Research Program of China (2019FY101002), the Fundamental Research Funds for the Zhejiang Provincial Universities (2021XZZX029)