An A1c of 5.9% indicates prediabetes.

• A. True
• B. False
• C. Only with fasting glucose
• D. Only with symptoms

Answer: (B)

Understanding A1c thresholds and what they mean for glucose status is the key idea here. Prediabetes is defined by an A1c in the 5.7% to 6.4% range. An A1c of 5.9% falls right within that range, so it indicates prediabetes rather than normal glucose tolerance or diabetes. Symptoms are not required for this classification; the lab value itself places someone in the prediabetes category. In practice, clinicians may repeat testing or use additional measures to confirm the overall glucose status, but the A1c level of 5.9% already identifies prediabetes.