Table 5.

CGM Data Interpretation Process

Step 1	Confirm that sufficient CGM data are available for analysis. A minimum of 14 days of CGM use, covering at least 70% (10 days), is needed for accurate interpretation.
Step 2	Evaluate the average glucose and Glucose Management Indicator (GMI) and then review the TIR, TBR and TAR statistics.
Step 3	Pattern identification, focusing first on indicators of hypoglycemia. If the data show problematic time below range, it is important to formulate strategies to resolve this issue (e.g., adjust medication, modify health behaviors) before addressing any other concerns. The 24-hour glucose profile will show the time(s) when hypoglycemia is occurring. If a pattern exists, it may be necessary to review multiple days to identify any particular day(s) or time (s) when the patterns are most significant.
Step 4	Pattern identification, addressing hyperglycemia. If the data indicate that time in range is not at the desired target level, clinicians are advised to review the 24- hour glucose profile to identify the time(s) when hyperglycemia is occurring. This is particularly important when the standard deviation is elevated. If a pattern exists, it may be necessary to review multiple days to identify any particular day(s) when the patterns are most significant.
Step 5	Assess the basal insulin dose (if applicable). For patients treated with intensive insulin regimens, clinicians are advised to determine the appropriateness of the basal dose. It is also important that clinicians talk to patients to determine how they are dosing for meals and correcting for elevated glucose values.