Construct validity of the Planetary Health Diet Index relative to global food group-based measures of a healthy diet: A multi-country analysis of 24-hour dietary intake data on the FAO/WHO Global Individual Food Consumption Data Tool.
PHDI may serve as a robust, dual purpose measure for monitoring adherence to diets that are both sustainable and healthy in contexts with regular quantitative dietary intake assessments and low burdens of diet-related undernutrition, however, simpler food group-based measures such as FGDS often show stronger associatio...