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Reliability and relative validity of short-food frequency questionnaire

Leila Nikniaz (Tabriz Health Services Management Research Center, Tabriz University of Medical Sciences, Tabriz, Iran)
Jafarsadegh Tabrizi (Tabriz Health Services Management Research Center, Faculty of Management and Medical Informatics, Tabriz University of Medical Sciences, Tabriz, Iran)
Homayoun Sadeghi-Bazargani (Road and Traffic Injury Research Center, Department of Statistics and Epidemiology, Faculty of Health, Tabriz University of Medical Sciences, Tabriz, Iran)
Mostafa Farahbakhsh (Research Center of Psychiatry and Behavioral Sciences, Tabriz University of Medical Sciences, Tabriz, Iran)
Sanaz Tahmasebi (Nutrition Faculty, Tabriz University of Medical Sciences, Tabriz, Iran)
Soheila Noroozi (Department of Human Nutrition, Faculty of Medicine, Qazvin University of Medical Sciences, Qazvin, Iran)

British Food Journal

ISSN: 0007-070X

Article publication date: 5 June 2017

Abstract

Purpose

The purpose of this paper is to describe reliability and relative validity of the short-food frequency questionnaire (SH-FFQ) used for assessing food groups and nutrient intakes of Iranian adults.

Design/methodology/approach

The food list used in the SH-FFQ was elaborated based on a dietary survey of a sample of 60 individuals aged between 15 and 65 years. A total of 180 subjects (93 males and 87 females) were included in the study. All participants completed two SH-FFQs with one month interval, a single 24 hours recall (24hR) and two food records for three non-consecutive days.

Findings

No significant differences were observed in the mean daily intakes of energy, food groups and most of the nutrients between the reference tools and the two semi-quantitative SH-FFQs (p>0.05). The mean energy-adjusted reliability coefficients for all variables were 0.54 and 0.55 in men and women. The mean energy-adjusted and deattenuated correlation coefficients for all items between the SH-FFQ and reference tools were 0.54. Also, the mean percent misclassified into opposite quartiles for all food groups and nutrients was 12.6 percent.

Originality/value

The designed SH-FFQ developed for the Life style Promotion Project has reasonable reliability and relative validity for food groups and nutrient in Iranian adults.

Keywords

Citation

Nikniaz, L., Tabrizi, J., Sadeghi-Bazargani, H., Farahbakhsh, M., Tahmasebi, S. and Noroozi, S. (2017), "Reliability and relative validity of short-food frequency questionnaire", British Food Journal, Vol. 119 No. 6, pp. 1337-1348. https://doi.org/10.1108/BFJ-09-2016-0415

Publisher

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Emerald Publishing Limited

Copyright © 2017, Emerald Publishing Limited