Standardized CGM metrics for clinical care: 2019
| 1. Number of days CGM worn (recommend 14 days) (42,43) | |
| 2. Percentage of time CGM is active (recommend 70% of data from 14 days) (41,42) | |
| 3. Mean glucose | |
| 4. Glucose management indicator (GMI) (75) | |
| 5. Glycemic variability (%CV) target ≤36% (90)* | |
| 6. Time above range (TAR): % of readings and time >250 mg/dL (>13.9 mmol/L) | Level 2 |
| 7. Time above range (TAR): % of readings and time 181–250 mg/dL (10.1–13.9 mmol/L) | Level 1 |
| 8. Time in range (TIR): % of readings and time 70–180 mg/dL (3.9–10.0 mmol/L) | In range |
| 9. Time below range (TBR): % of readings and time 54–69 mg/dL (3.0–3.8 mmol/L) | Level 1 |
| 10. Time below range (TBR): % of readings and time <54 mg/dL (<3.0 mmol/L) | Level 2 |
| Use of Ambulatory Glucose Profile (AGP) for CGM report | |
CV, coefficient of variation.
↵*Some studies suggest that lower %CV targets (<33%) provide additional protection against hypoglycemia for those receiving insulin or sulfonylureas (45,90,91).