Diabetes is diagnosed when fasting glucose reaches what value on two separate tests?

Diabetes is diagnosed when fasting glucose reaches what value on two separate tests?

• A. 5.6-6.9 mmol/L
• B. ≥7.0 mmol/L on two separate tests
• C. ≥7.0 mmol/L on a single test
• D. <5.6 mmol/L

Answer: (B)

The key idea is that diabetes diagnosis using fasting glucose requires persistent high levels. A fasting plasma glucose of 7.0 mmol/L or higher on two separate occasions confirms diabetes (7.0 mmol/L is about 126 mg/dL). This two-test rule helps ensure the elevated reading isn’t a one-time spike from temporary factors like illness or lab variability. For context, normal fasting glucose is below 5.6 mmol/L, and 5.6–6.9 mmol/L indicates impaired fasting glucose (prediabetes). By requiring two abnormal results, you’re verifying that the hyperglycemia is sustained rather than incidental.

The key idea is that diabetes diagnosis using fasting glucose requires persistent high levels. A fasting plasma glucose of 7.0 mmol/L or higher on two separate occasions confirms diabetes (7.0 mmol/L is about 126 mg/dL). This two-test rule helps ensure the elevated reading isn’t a one-time spike from temporary factors like illness or lab variability. For context, normal fasting glucose is below 5.6 mmol/L, and 5.6–6.9 mmol/L indicates impaired fasting glucose (prediabetes). By requiring two abnormal results, you’re verifying that the hyperglycemia is sustained rather than incidental.