Development of a Web-Based Food Frequency Questionnaire and Diet Quality Score for Turkish Adults

NCT ID: NCT06536270

Last Updated: 2025-01-22

Basic Information

• Recruitment Status: COMPLETED
• Total Enrollment: 151 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2024-05-19
• Study Completion Date: 2024-12-30

Brief Summary

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.

Detailed Description

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.

Conditions

Nutritional Assessments; Nutritional Quality

Study Design

• Observational Model Type: OTHER
• Study Time Perspective: CROSS_SECTIONAL

Interventions

A validation and reproducibility study with a cross-sectional component

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.

Intervention Type: OTHER

Eligibility Criteria

Inclusion Criteria

• Adults aged 18-65 years.
• No diagnosed medical conditions (e.g., diabetes, heart disease, cancer, gastrointestinal conditions).
• Not pregnant or lactating.
• No food allergies or intolerances.
• Not following a specialized diet (e.g., vegan, weight-loss, sports nutrition regimen; vegetarians are eligible).
• Not receiving face-to-face nutritional services or dietary advice from a medical professional.
• Not participating in another nutrition study.
• Residing in Turkey.

Exclusion Criteria

• Individuals with any diagnosed medical conditions.
• Pregnant or lactating women.
• Individuals with food allergies or intolerances.
• Those following a specialized diet (except vegetarians).
• Participants currently receiving face-to-face nutritional services or dietary advice.
• Individuals involved in another nutrition study.
• Individuals residing outside of Turkey.

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 65 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

University of Reading

OTHER

Sponsor Role: collaborator

Medipol University

OTHER

Sponsor Role: lead

Responsible Party

Merve GÜNEY COŞKUN

Lecturer

Responsibility Role: PRINCIPAL_INVESTIGATOR

Locations

Istanbul Medipol University

Istanbul, Beykoz, Turkey (Türkiye)

Countries

Turkey (Türkiye)

Other Identifiers

E-10840098-772.02-6576

Identifier Type: -

Identifier Source: org_study_id