Relative Validity and Reproducibility of a Semi-quantitative Food Frequency Questionnaire among Urban Iranians

Maryam  Nouri; Shohreh  Ghazizahedi; Seyed Amir Reza  Mohajeri; Abdolreza  Norouzy; Mohsen  Nematy; Neda  Shalaey; Mohammad  Safarian; Habibollah  Esmaily; Elham  Sabouri; Niloofar  Rajaei; Ali  Tarighat-Esfanjani; Zahra Noroozi; Mina  Amin; Masoud  Avari; Elham  Rezaei; Seyed Ehsan  Hoseinzadeh Hoseini; Mina  Hajihosein; Ali  Azimi; Amir Reza  Razavi

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Relative Validity and Reproducibility of a Semi-quantitative Food Frequency Questionnaire among Urban Iranians

Author(s):

Maryam Nouri¹,

Shohreh Ghazizahedi¹,

Seyed Amir Reza Mohajeri¹,

Abdolreza Norouzy¹,

Mohsen Nematy^1,*,

Neda Shalaey¹,

Mohammad Safarian¹,

Habibollah Esmaily²,

Elham Sabouri¹,

Niloofar Rajaei¹,

Ali Tarighat-Esfanjani³,

Zahra Noroozi³,

Mina Amin³,

Masoud Avari³,

Elham Rezaei⁴,

Seyed Ehsan Hoseinzadeh Hoseini⁵,

Mina Hajihosein⁶,

Ali Azimi⁷,

Amir Reza Razavi⁸

1Department of Nutrition, School of Medicine, Mashhad University of Medical Science, Mashhad, Iran

2Health Sciences Research Center, Department of Biostatistics and Epidemiology, School of Health, Mashhad University of Medical Sciences, Mashhad, Iran

3Nutrition Research Center, Faculty of Nutrition and food sciences, Tabriz University of Medical Science, Tabriz, Iran

4Department of Nutrition, School of Public Health, Isfahan University of Medical Sciences, Isfahan, Iran

5Shiraz University of Medical Sciences, Shiraz, Iran

6Faculty of Nutrition and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran

7School of Medicine, Mashhad University of Medical Science, Mashhad, Iran

8Department of Medical Informatics, School of Medicine, Mashhad University of Medical Science, Mashhad, Iran

Journal of Health Reports and Technology:Vol. 3, issue 1; e74185

Published online:Jul 01, 2017

Article type:Research Article

Received:May 05, 2017

Accepted:May 25, 2017

How to Cite:Maryam NouriShohreh GhazizahediSeyed Amir Reza MohajeriAbdolreza NorouzyMohsen NematyNeda ShalaeyMohammad SafarianHabibollah EsmailyElham SabouriNiloofar RajaeiAli Tarighat-EsfanjaniZahra NorooziMina AminMasoud AvariElham RezaeiSeyed Ehsan Hoseinzadeh HoseiniMina HajihoseinAli AzimiAmir Reza Razaviet al.Relative Validity and Reproducibility of a Semi-quantitative Food Frequency Questionnaire among Urban Iranians.J Health Rep Technol.3(1):e74185.

Abstract

The contribution of dietary factors to the development and prevention of non-communicable diseases is being increasingly recognized, and worldwide, the concern about chronic diseases is growing rapidly. There is a lack of a comprehensive food frequency questionnaire (FFQ) encompassing all kinds of foods for Iranians. This cross-sectional study aims to describe the relative validity and reproducibility of the FFQ used for assessing nutrient intakes of Iranian urban population. One hundred thirteen subjects aged 20–69 years from five major cities of Iran participated in this study. The dietary intake was assessed by a semi-quantitative FFQ involving 160 Iranian food items. The participants were asked to complete two FFQs (at the first and fourth months of the study) and three-day food records every month. Two blood and 24-h urine samples were collected at fifth and sixth months. The highest correlation coefficient in all FFQs was for fat (r = 0.669; p < 0.001) and the lowest for fiber (r = 0.331; p = 0.001). The Pearson correlation coefficients between nutrient intake estimated by the average of the two FFQs and the average of the three-day food records ranged from 0.03 to 0.27. The Pearson correlation coefficients between serum and urine biomarkers and nutrient intake estimated by the average of the two FFQs ranged from −0.34 to 0.47. Bland and Altman analyses showed fairly good agreement between the average of the FFQs and three-day food records for energy, fat, and potassium intakes. The obtained results indicate a reasonable validity of the FFQ considering the energy, fat, and potassium intake evaluation and good reproducibility over a 6- month period.

Keywords

Food Frequency Questionnaire

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