Minimum days estimation for reliable dietary intake information: findings from a digital cohort.

ABSTRACT:

Background/objectives

Accurate dietary assessment is essential for understanding diet-health relationships, yet day-to-day variability in intake complicates the identification of individuals' usual consumption. This study aimed to determine the minimum number of days required to obtain reliable estimates of dietary intake across various nutrients and food groups using data from a large digital cohort.

Methods

We analyzed dietary data from 958 participants of the "Food & You" study in Switzerland, who tracked their meals for 2-4 weeks using the AI-assisted MyFoodRepo app. Over 315,000 meals were logged across 23,335 participant days. We assessed day-of-week intake patterns using linear mixed models and estimated minimum days for reliable measurement using two complementary me

SUBMITTER: Singh R 

PROVIDER: S-EPMC12537485 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature