Time in Range
The percentage of time glucose stays inside a target range during a CGM reporting period.
Plain English
Time in range tells you how much of the day glucose stayed where the care plan wanted it.
Why It Matters After 40
It can reveal daily variability that HbA1c averages can hide.
What To Do With It
Use it with CGM wear time, hypo time, meal context, and clinician-set targets.
Human Utility
- Know what the term means before uploading data into an AI tool.
- Separate explanation from medical interpretation.
- Bring trend data and context to the appointment instead of one isolated number.
Proof Structure
It is a CGM metric
Consensus discussions define time in range as the percentage of CGM readings within the desired glucose range.
Source: Time in range review