Psychometric Properties of the Turkish Version of the Dietary Fat and Free Sugar-Short Questionnaire (DFS-TR) in Adults: A Validity and Reliability Study

Background/Objectives: The aim of this study was to translate the Dietary Fat and Free Sugar-Short Questionnaire (DFS) into Turkish (DFS-TR) and to establish its construct validity and reliability. Methods: Quota sampling was used to ensure demographic homogeneity across gender and age groups. Participant distribution by age categories was proportionally aligned with the demographic statistics of the adult Turkish population. The study comprised 314 participants aged 19-64 years (38.78 ± 12.10), of which 54.5% were female. The data collection form consisted of demographic characteristics, anthropometric measurements, information on eating habits, DFS-TR, the Food Frequency Questionnaire (FFQ), and the Power of Food Scale (PFS). Results: Test-retest reliability was confirmed in the 314 participants with a 4-week interval (r = 0.997, p Conclusions: The DFS-TR can be used as a reliable and valid measurement tool for estimating saturated fat and free sugar intake among Turkish adults.