Reproducibility and Validity of a Food Intake Survey Developed for Implementation via Digital Health for Patients...

Area of Science:

• Cardiovascular Disease Research
• Nutritional Science
• Medical Technology

Background:

• Cardiovascular diseases (CVD) often require dietary modifications for management.
• Accurate assessment of food intake is crucial for effective dietary interventions in CVD patients.
• Existing dietary assessment methods may have limitations in structured self-administration.

Purpose of the Study:

• To develop and evaluate the SaFIS (Structured Self-administered Food Intake Survey).
• To assess the reproducibility and validity of SaFIS in patients with cardiovascular diseases.
• To determine the clinical potential of SaFIS for dietary improvement tracking.

Main Methods:

• Developed SaFIS with 31 items based on Japanese dietary recommendations for preventing arteriosclerotic disease.
• Evaluated reproducibility using a 1-month interval test-retest with intraclass correlation coefficient (ICC).
• Assessed validity by comparing SaFIS results with weighed dietary records (WDR) using Bland-Altman plots.

Main Results:

• SaFIS demonstrated high reproducibility for energy (ICC 0.90) and macronutrients like protein (0.90) and carbohydrates (0.89).
• Validity assessments showed minimal discrepancies between SaFIS and WDR for energy and key nutrients.
• Specific nutrient differences included SaFIS-based values being higher for energy, protein, carbohydrates, monounsaturated fatty acids, and dietary fiber.

Conclusions:

• SaFIS is a reproducible and valid tool for assessing food intake in CVD patients.
• The survey has significant clinical potential for guiding dietary improvements.
• Future development includes exploring SaFIS integration into digital health platforms for enhanced usability.