Glycemia Risk Index (GRI) - A Granular Metric Beyond TIR in CGM: A Commentary

Dr. Manodip Acharyya

Abstract: Time in Range (TIR) has become a cornerstone in CGM-based diabetes management. However, it does not fully capture the risks associated with glycemic variability or the severity of hypo-and hyperglycemia. The Glycemia Risk Index (GRI) has emerged as a promising complementary metric. This review explores the limitations of TIR, the rationale for GRI, and the role of composite glycemic metrics in enhancing clinical decision-making.

Keywords: Time in Range, Glycemia Risk Index, continuous glucose monitoring, glycemic variability, diabetes management