In the context of diabetes management, what does HbA1c indicate?

The correct answer is B, which indicates that HbA1c measures the average blood glucose levels over the past 2-3 months. HbA1c, or hemoglobin A1c, is a specific form of hemoglobin that has glucose attached to it. The level of HbA1c provides valuable insight into a person's long-term blood sugar control, reflecting the average glucose concentration in the blood over the preceding weeks to months.

This assessment is crucial in diabetes management as it helps healthcare providers evaluate how well a patient's diabetes treatment plan is working and whether any adjustments are needed. A higher HbA1c level suggests poor blood sugar control, while a lower level indicates better management of the condition.

In contrast, current blood glucose readings reflect immediate levels, but they do not provide a historical view of blood sugar control. Insulin sensitivity refers to how effectively the body's cells respond to insulin, which is not measured by HbA1c. Furthermore, while HbA1c can be used in the diagnostic criteria for diabetes, it primarily serves to assess the management of the disease over time rather than making a diagnosis directly.