How are HbA1c and Blutzucker related?

HbA1c (glycated hemoglobin) and blood glucose are closely related: HbA1c reflects the average blood glucose level over the preceding 8–12 weeks. It forms when glucose non-enzymatically binds to hemoglobin in red blood cells. The higher the blood glucose over that period, the higher the HbA1c. However, the relationship is not perfectly linear – extremes of glucose or conditions like anemia, kidney disease, or hemoglobin variants can affect HbA1c accuracy. HbA1c is a standard clinical tool for diabetes diagnosis and management, but it does not replace daily blood glucose monitoring. The evidence is strong (clinical guidelines). Note: The provided context does not contain information on HbA1c or blood glucose.