The Importance of Time in Range (TIR)
Time in Range (TIR) is increasingly recognized by endocrinologists as more important than A1C for daily management. While A1C is an average, TIR shows the quality of that average—specifically how much time you spend within the healthy target zone of 70 to 180 mg/dL.
International Clinical Targets
The International Consensus on TIR recommends these goals for Type 1 & Type 2 patients:
- Target Range: > 70%
- Low Range: < 4%
- Very Low: < 1%
- High Range: < 25%
Why TIR Matters More Than A1C
Two people can have the same A1C of 7.0%, but one might have very stable glucose levels while the other experiences frequent dangerous "highs" and "lows" (glucose variability). TIR captures this variability, helping patients avoid complications and improve their quality of life.
Internal Link: Calculate GMI
CGM users should also track their Glucose Management Indicator (GMI), which is a prediction of lab A1C based on your CGM data. Use our GMI Calculator here.
