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Validity and reliability of a new food frequency questionnaire compared to 24h recalls and biochemical measurements: Pilot phase of Golestan cohort study of esophageal cancer

Malekshah, A.F. and Kimiagar, M. and Saadatian-Elahi, M. and Pourshams, A. and Nouraie, M. and Goglani, G. and Hoshiarrad, A. and Sadatsafavi, M. and Golestan, B. and Yoonesi, A. and Rakhshani, N. and Fahimi, S. and Nasrollahzadeh, D. and Salahi, R. and Ghafarpour, A. and Semnani, S. and Steghens, J.P. and Abnet, C.C. and Kamangar, F. and Dawsey, S.M. and Brennan, P. and Boffetta, P. and Malekzadeh, R. (2006) Validity and reliability of a new food frequency questionnaire compared to 24h recalls and biochemical measurements: Pilot phase of Golestan cohort study of esophageal cancer. European Journal of Clinical Nutrition, 60 (8). pp. 971-977.

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Abstract

Background: A pilot study was carried out to evaluate validity and reproducibility of a food frequency questionnaire (FFQ), which was designed to be used in a prospective cohort study in a population at high risk for esophageal cancer in northern Iran. Methods: The FFQ was administered four times to 131 subjects, aged 35-65 years, of both sexes. Twelve 24-h dietary recalls for two consecutive days were administered monthly during 1 year and used as a reference method. The excretion of nitrogen was measured on four 24-h urine samples, and plasma levels of β-carotene, retinol, vitamin C and α-tocopherol was measured from two time points. Relative validity of FFQ and 24-h diet recall was assessed by comparing nutrient intake derived from both methods with the urinary nitrogen and plasma levels of β-carotene, retinol, vitamin C and α-tocopherol. Results: Correlation coefficients comparing energy and nutrients intake based on the mean of the four FFQ and the mean of twelve 24-h diet recalls were 0.75 for total energy, 0.75 for carbohydrates, 0.76 for proteins and 0.65 for fat. Correlation coefficients between the FFQ-based intake and serum levels of β-carotene, retinol, vitamin C and vitamin E/α-tocopherol were 0.37, 0.32, 0.35 and 0.06, respectively. Correlation coefficients between urinary nitrogen and FFQ-based protein intake ranged from 0.23 to 0.35. Intraclass correlation coefficients used to measure reproducibility of FFQ ranged from 0.66 to 0.89. Conclusion: We found that the FFQ provides valid and reliable measurements of habitual intake for energy and most of the nutrients studied. © 2006 Nature Publishing Group. All rights reserved.

Item Type: Article
Additional Information: cited By 57
Uncontrolled Keywords: alpha tocopherol; ascorbic acid; beta carotene; nitrogen; retinol, adult; aged; article; caloric intake; cancer risk; carbohydrate intake; cohort analysis; controlled study; correlation coefficient; esophagus cancer; fat intake; female; food intake; high risk population; human; Iran; major clinical study; male; nitrogen urine level; pilot study; prevalence; prospective study; protein intake; questionnaire; reliability; reproducibility; urinalysis; validation study; validity; vitamin blood level, Adult; Aged; Cohort Studies; Diet; Diet Surveys; Dietary Carbohydrates; Dietary Fats; Dietary Proteins; Energy Intake; Esophageal Neoplasms; Female; Humans; Iran; Male; Mental Recall; Middle Aged; Nitrogen; Pilot Projects; Prospective Studies; Questionnaires; Reproducibility of Results; Sensitivity and Specificity; Vitamins
Subjects: کهورت
مقالات نمایه شده محققین دانشگاه در سایت ,Web of Science ,Scopus
موارد کلی
Divisions: معاونت تحقیقات و فناوری
Depositing User: GOUMS
Date Deposited: 21 Apr 2015 07:45
Last Modified: 06 Feb 2017 05:07
URI: http://eprints.goums.ac.ir/id/eprint/2597

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