Adherence to the Planetary Health Diet Index and Risk of Glycemic Progression or Regression in Prediabetic Individuals: a Longitudinal Study

Whether adherence to the Planetary Health Diet Index (PHDI)—a dietary pattern jointly promoting human and environmental health—influences glycemic trajectories among individuals with prediabetes remains unknown. This study examined associations between PHDI adherence and odds of regression to normoglycemia and progression to type 2 diabetes mellitus (T2DM) in prediabetic adults. We conducted a prospective cohort analysis among 4,143 prediabetic adults (age range 19–70 years, 46.2