The Recovery–Burden Index for Assessing β-Cell Function from OGTT Glucose Profiles

The Recovery–Burden Index (RBI), a glucose-only geometric metric that quantifies post-peak glucose recovery relative to total glucose excursion during OGTT, is developed, highlighting post-peak recovery as a key feature for estimating DI-associated β-cell compensation and support further validation of RBI in extended or CGM-augmented OGTT settings.