Validity and reproducibility of the PERSIAN Cohort food frequency questionnaire: assessment of major dietary patterns

• DOI: 10.1186/s12937-024-00938-0
• Publication Date: 2024-03-13T08:33:15Z
• Authors: Sareh Eghtesad; Sahar Masoudi; Maryam Sharafkhah; Bahram Rashidkhani; Ali Esmaeili-Nadimi; Farid Najafi; Elnaz Faramarzi; Reza Homayounfar; Pedram Ebrahimnejad; Alireza Ansari-Mo...; Mohammadreza Mirj...; Hossein Poustchi; Walter C Willett; Reza Malekzadeh; Azita Hekmatdoost
• Keywords: Food frequency questionnaire; Clinical nutrition; Nutritional Epidemiology

Abstract Background Dietary patterns, encompassing an overall view of individuals’ dietary intake, are suggested as a suitable means assessing nutrition’s role in chronic disease development. The aim this study was to evaluate the validity and reproducibility food frequency questionnaire (FFQ) designed for use Prospective Epidemiological Research Studies IrAN (PERSIAN), by comparing major patterns assessed FFQ with reference method. Methods Study participants included men women who enrolled PERSIAN Cohort at seven eighteen centers. These centers were chosen include variations observed among different Iranian ethnic populations. Two completed each participant over one-year period (FFQ1 upon enrollment FFQ2 end study), 24 interviewer-administered 24-hour recalls (24 h) being monthly between. Spearman correlation coefficients (SCC) used FFQs 1 2 h assess validity, while FFQ1 compared questionnaire. Results Three patterns—Healthy, Low Protein/High Carb Unhealthy—were identified, accounting 70% variance population. Corrected SCC ranged from 0.31 0.61 0.34 0.57 analyses, first two which accounted 50% population variance, correlated above 0.5 both parameters, showing acceptable findings. Conclusions is identification populations it for, order diet-disease relationships.