There's an App for That: Development of an Application to Operationalize the Global Diet Quality Score.

Background: The global diet quality score (GDQS) is a simple, standardized metric appropriate for population-based measurement of diet quality globally.

Objectives: We aimed to operationalize data collection by modifying the quantity of consumption cutoffs originally developed for the GDQS food groups and to statistically evaluate the performance of the operationalized GDQS relative to the original GDQS against nutrient adequacy and noncommunicable disease (NCD)-related outcomes.

Methods: The GDQS application uses a 24-h open-recall to collect a full list of all foods consumed during the previous day or night, and automatically classifies them into corresponding GDQS food group.