Validity and Reproducibility of a Revised Semi-quantitative Food Frequency Questionnaire (SQFFQ) for Women of Age-group 12-44 Years in Chengdu

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ABSTRACT

To find a credible nutritional screening tool for evaluating relationship between nutritional status and diseases in Chengdu female residents, the reliability and validity of a revised semi-quantitative food frequency questionnaire (SQFFQ) were tested. The validity was assessed by comparing the SQFFQ with the ‘standard’ method of 3 days’ dietary recall, and the reliability was assessed by comparing the first SQFFQ with the second SQFFQ at 4 weeks interval. Correlation analysis showed that, for reliability, the average correlation coefficient (CC) of 22 kinds of nutrients was 0.66 and reduced to 0.60 after adjusting for energy; the average of intra-class correlation coefficients (ICC) was 0.65. For validity, the average CC was 0.35 and remained stable after adjusting for CC of energy or nutrients. Validity of 17 nutrients in SQFFQ survey had correlation with result of 3 days’ dietary recall. The results showed that the revised SQFFQ can be used for investigating the role of nutrients in development of disease in Chengdu female residents.

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Most cited references 37

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Validation of a youth/adolescent food frequency questionnaire.

H Rockett, M. Breitenbach, A L Frazier … (1997)

To address limited longitudinal nutrition data on children and adolescents, a self-administered food frequency questionnaire was designed for older children and adolescents. Initially, the Youth/Adolescent Questionnaire (YAQ) was developed and demonstrated to be reproducible. This study was conducted to evaluate its validity. The form was administered twice to a sample of 261 youths (ages 9 to 18) at an approximate interval of 1 year (1993-1994), and three 24-hr dietary recalls were collected during this period. Pearson correlation coefficients were calculated on nutrient data. Validity was first evaluated by comparing the average of the three 24-hr recalls to the average of the two YAQs. Similar mean nutrients were found by both methods. Correlation coefficients between the mean energy-adjusted nutrients computed by the two methods ranged from 0.21 for sodium to 0.58 for folate. After correction for within-person error, the average correlation coefficient was 0.54, similar to that found among adults. A simple self-administered questionnaire completed by older children and adolescents can provide nutritional information about this age group.

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Validity and reproducibility of the food frequency questionnaire used in the Shanghai Women's Health Study.

X O Shu, G Yang, F Jin … (2004)

To evaluate the validity and reliability of the food frequency questionnaire (FFQ) used in the Shanghai Women's Health Study (SWHS), 200 SWHS participants were recruited for a dietary calibration study. Study participants completed an FFQ at baseline and 24-h dietary recalls (24-HDR) twice per month consecutively for 12 months. At the end of the study, a second FFQ was administered. Of the 200 study participants, 196 completed 24 or more days of 24-h dietary recalls, 191 completed two FFQs from whom the results of this report were based. The FFQ included the foods that accounted for 86% of the foods recorded in the 24-HDR surveys. Validity of the FFQ was evaluated by comparing intake levels of major nutrients and foods obtained from the second FFQ with those derived from the multiple 24-HDR. The median intake for major nutrients, rice, poultry and meat derived from the second FFQ and the 24-HDR was similar, with the differences ranging from 1.3 to 12.1%. The FFQ tended to overestimate the intake level of total vegetables and total fruits, and the differences were explained mainly by over-reporting seasonal vegetables and fruits consumption in the FFQ. Nutrient and food intake assessed by the FFQ and the multiple 24-HDR correlated very well, with the correlation coefficients being 0.59-0.66 for macronutrients, 0.41-0.59 for micronutrients, and 0.41-0.66 for major food groups. The reliability of the FFQ was assessed by comparing the correlation and median intake of nutrients and food groups obtained from the two FFQs that were administered approximately 2 y apart. The median intake levels for selected nutrients and food groups derived from the two FFQs were similar with differences below 10%. At the individual level, the intake levels of these dietary variables obtained from two FFQs also correlated well. When nutrient and food group intakes were categorized into quartiles, FFQ and 24-HDR produced exact agreement rates between 33 and 50%. Misclassification to adjacent quartile was common, ranging from 34-48%, while misclassification to an extreme quartile was rare (1-6%). These data indicate that the SWHS FFQ can reliably and accurately measure usual intake of major nutrients and food groups among women in Shanghai.

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U.S. Department of Agriculture and U.S. Department of Health and Human Services, Dietary Guidelines for Americans, 2010. 7th Edition, Washington, DC: U.S. Government Printing Office, January 2011.

Shelley McGuire (2011)

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Author and article information

Journal

Journal ID (nlm-ta): J Health Popul Nutr

Journal ID (iso-abbrev): J Health Popul Nutr

Journal ID (pmc): JHPN

Title: Journal of Health, Population, and Nutrition

Publisher: International Centre for Diarrhoeal Disease Research, Bangladesh

ISSN (Print): 1606-0997

ISSN (Electronic): 2072-1315

Publication date (Print): March 2015

Volume: 33

Issue: 1

Pages: 50-59

Affiliations

[1] ¹Department of Ultrasonography, West China Women's and Children's Hospital of Sichuan University, China

[2] ²Department of Obstetrics and Gynecology, West China Women's and Children's Hospital of Sichuan University, China

[3] ³Mother and Baby Center, School of Medicine and Public Health, University of Newcastle, Australia

[4] ⁴Department of Evidence-based Medicine and Clinical Epidemiology, West China Hospital, Sichuan University, China

[5] ⁵Department of Nutrition and Food Safety, Sichuan University, China

[6] ⁶West China School of Public Health, Sichuan University, China

Author notes

Correspondence and reprint requests: Dr. Liangzhi Xu, Department of Obstetrics and Gynecology, West China Women's and Children's Hospital of Sichuan University, No.20, 3rd Section, Renmin Nan Lu, Chengdu, Sichuan 610041, China, Email: liangzxu@ 123456126.com , Fax: +86 02885405541

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Other ID: jhpn0033-0050

PMC ID: 4438648

PubMed ID: 25995721

SO-VID: d8535336-28c3-4042-ac5c-38f713647ed9

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This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Validity and Reproducibility of a Revised Semi-quantitative Food Frequency Questionnaire (SQFFQ) for Women of Age-group 12-44 Years in Chengdu

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Karger: Nutrition and Dietetics

Most cited references 37

Validation of a youth/adolescent food frequency questionnaire.

Validity and reproducibility of the food frequency questionnaire used in the Shanghai Women's Health Study.

U.S. Department of Agriculture and U.S. Department of Health and Human Services, Dietary Guidelines for Americans, 2010. 7th Edition, Washington, DC: U.S. Government Printing Office, January 2011.

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