Use the index in the following scenarios:
Historically, the primary index for diabetes management was the Hemoglobin A1c (HbA1c) test. While still the gold standard for diagnosis, recent guidelines have introduced a "New Index" of metrics derived from Continuous Glucose Monitoring (CGM) technologies.
The modern DMG index is now defined by the "Glucose Metrics Trinity":
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Creating an index involves several steps:
| Metric (Index) | Definition | Clinical Target (New DMG) | | :--- | :--- | :--- | | HbA1c | Average blood sugar over 2–3 months. | < 7.0% (Standard) | | GMI (Glucose Management Indicator) | Estimated A1c based on CGM readings over 14 days. | "New" replacement for eA1c; better reflects real-time control. | | TIR (Time in Range) | % of time glucose is 70–180 mg/dL. | > 70% (Roughly equates to A1c < 7%) | | TBR (Time Below Range) | % of time glucose < 70 mg/dL. | < 4% (Critical safety metric) | | GV (Glycemic Variability) | Fluctuation in glucose levels (Coefficient of Variation). | < 36% (Lower is better; indicates stability). |