Working papers released openly prior to or alongside peer review. Each preprint is versioned and timestamped; we encourage readers to compare against any subsequent peer-reviewed version. Preprints have not undergone external peer review.
Background: Validation studies of dietary assessment applications are typically conducted in controlled settings with non-clinical participants. The question of how well published accuracy figures transfer to the clinical populations that most frequently use such applications — p…
Background: The Initiative's Weighed-Meal Reference Set v1.0 (mini-180) is built around meals prepared in a metabolic kitchen, where each ingredient can be weighed before plating and cross-referenced against USDA FoodData Central Foundation Foods entries. This design delivers cle…
Background: A growing number of dietary tracking applications ship both a manual food-entry interface and a photo-based (computer-vision-assisted) capture interface within the same product. When both modes exist in the same application, any published accuracy figure that does not…
Background: Validation studies of dietary assessment applications typically summarise app-versus-reference agreement using either Bland-Altman 95% limits of agreement (LoA) or the intraclass correlation coefficient (ICC), and sometimes both. These two statistics capture related b…
Background: Photo-based dietary assessment applications are frequently evaluated against curated meal image sets, but the cuisine composition of these evaluation sets is rarely reported in a structured way. If a given set skews heavily toward one culinary tradition, published acc…