Fig. 2: Minimum number of days required to achieve reliability thresholds (r) of 0.8 (blue), 0.85 (yellow), and 0.9 (green) for various nutrients and food groups using the Coefficient of Variation (CV) method.
From: Minimum days estimation for reliable dietary intake information: findings from a digital cohort
These thresholds represent different levels of desired correlation between observed and true intakes, with 0.9 being the most stringent criterion. Top 30 nutrients are shown; sorted by the variance ratio. Additionally, variance ratio, between-subject coefficient of variation (CVb), and within-subject coefficient of variation (CVw) are shown for the top 35 nutrients.
