Frequently Asked Questions
What is a good glucose CV?
A coefficient of variation below 36 percent is the widely cited target for stable glucose. Higher values indicate larger swings that raise the risk of both highs and lows.
How is estimated A1c calculated?
It uses the standard ADAG formula that converts average glucose to A1c. Estimated A1c can differ from a lab result, so treat it as an approximation.
What is a good coefficient of variation (CV) for glucose control?
The international consensus target for time-in-range management is a CV below 36%. A CV above 36% indicates high glycemic variability, which is associated with increased risk of hypoglycemia, oxidative stress, and diabetes complications independent of HbA1c. People with type 1 diabetes often have higher CV than type 2 due to insulin-dependent glucose dynamics. Continuous glucose monitors (CGMs) report CV automatically, and endocrinologists use it alongside TIR and HbA1c for a complete picture.
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This calculator provides general health information only and is not medical advice. Results do not replace professional medical evaluation or diagnosis. Consult a licensed healthcare provider before making health decisions. Always seek immediate medical attention for emergencies.