Development, validation and assessment of reproducibility of a modern version of semi-quantitative food frequency questionnaire for the adult population

The changing structure of food consumption requires updating the nutrition assessment tool, taking into account modern dietary patterns. Aim . To develop, evaluate validity and reproducibility semiquantitative frequency questionnaire (FFQ) for adult population. Material methods. FFQ was developed as part Russian international Prospective Urban Rural Epidemiological (PURE) study. compare quantitative parameters energy nutritional value diet, validation used data on actual 294 men women aged 25-65 years, collected by 2 methods: 24-hour recall (24hDR) — 4 surveys per year (1 time season) surveys: initially (FFQ1) after 12 months (FFQ2). Results minimum mean values vast majority nutrients were recorded 24hDR method, while higher FFQ2, maximum FFQ1. Pearson’s correlation coefficients ranged from 0,19 (retinol equivalent) to 0,53 (cholesterol), showing a moderate relationship between two After crossclassification, proportion subjects assigned same quartile FFQ2 nutrient profile 26,9% (β-carotene) 43,5% those opposite quartiles 3,1% (cholesterol) 11,2% equivalent), indicating good agreement these Bland-Altman plots showed slightly overestimated scores total carbohydrate, protein, calories. Pearson FFQ1 0,46 0,82. intraclass lower than correlation. However, most them remained at >0,60. Conclusion results predominantly version, which allows it be assess in population with estimation diet protocols epidemiological, preventive clinical studies.