An observational study in Nutritional Assessments and Nutritional Quality, sponsored by Medipol University. Completed at 1 site in Turkey. Open to participants aged 18 Years to 65 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2025-01-22.
Sponsored by Medipol University · Observational
This research aims to adapt and validate the web-based eNutri Food Frequency Questionnaire (FFQ) and Diet Quality Score (DQS) for the Turkish population, addressing the current gap in dietary assessment tools for Turkey. The study involves adapting the UK-based eNutri FFQ to reflect Turkish dietary habits, including revising the food list, capturing portion size photos, and incorporating local food composition data. The revised FFQ will be validated against three 24-hour dietary recalls and tested for reproducibility.
Background: Non-communicable diseases (NCDs), such as cardiovascular diseases, are important global health concerns. Accurate dietary assessment is pivotal in understanding the relationship between food intake and health outcomes. Presently, there is a notable absence of a comprehensive dietary assessment tool tailored for the Turkish population.
Objective: The primary objective of this research is to adapt and validate the web-based eNutri Food Frequency Questionnaire (FFQ) and Diet Quality Score (DQS) for the Turkish population, addressing the current gap in dietary assessment methods.
Design and Proposed Analysis: The first part of the study will involve adapting the UK-based e-Nutri FFQ to reflect dietary habits of Turkish adults (eNutri-Turkey), such as revising the food list, taking portion size photos, and incorporating Turkish food composition data. The revised FFQ delivered online will be validated against three 24-hour recalls by phone (reference method) and the FFQ will be administered twice to assess reproducibility. The study will employ Cronbach's Alpha for internal consistency and the Bland-Altman method for validity. Additionally, inter-rater reliability and reproducibility will be assessed through Cohen's Kappa and ICC analysis, respectively. The eNutri DQS will be adapted in accordance with Turkish dietary guidelines. Following the adaptation, its validity will be assessed using existing Turkish population nutrient data. This analysis will involve retrospectively calculating the DQS and examining its associations with key risk markers of chronic diseases (BMI, blood pressure, blood glucose and cholesterol levels). Additionally, two qualitative studies will be conducted before starting the validation study. Dietitians and nutrition academics from Turkey (n=10) will provide insights on the suitability and effectiveness of eNutri-Turkey through one-to-one interviews. Feedback received will be used to improve the FFQ and DQS.
Medipol University is the lead sponsor of 311 studies on the registry; 86 are open to participants now.
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The study population will consist of Turkish adults aged 18-65 years who reside in Turkey.
Exclusion Criteria:
The primary intervention in this study involves adapting and validating the eNutri web-based Food Frequency Questionnaire and Diet Quality Score for the Turkish population.
Validity of the web-based FFQ
Assesses the validity of the adapted eNutri FFQ by comparing its results with those from three 24-hour dietary recalls. Validity is evaluated based on nutrient intake measurements.
Time frame: 14-day period
Reproducibility of the web-based FFQ
Measures reproducibility by administering the FFQ twice to participants and analyzing the consistency of the results. Consistency of results; statistical measures will be used for analysis.
Time frame: 14-day period
Usability of the web-based FFQ
Evaluates usability through participant feedback on a scale (e.g., Likert scale) on the clarity and ease of use of the FFQ and portion size images.
Time frame: Immediately after the first FFQ administration
Usability Comparison of 24-Hour Recall and web-based FFQ
Compares dietary intake data obtained from the 24-hour recall method (reference method) with that obtained from the FFQ administered after the second FFQ to assess usability.
Time frame: Immediately after the second FFQ administration
Plan to share: No — The Individual Participant Data (IPD) sharing plan does not include making anonymized data available to other researchers. Instead, data access will be provided only through secure platforms to researchers with approved proposals, ensuring adherence to confidentiality and ethical standards. The data will be shared through publication, with clear terms outlined to safeguard participant privacy.
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This study is completed, as verified in Jan 2025. You cannot join it, but the record below documents what was studied.
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Medipol University