Fast Five Quiz: Glycemic Control in Type 2 Diabetes

Romesh Khardori, MD, PhD

Disclosures

September 23, 2020

Figure 1. Glycemia test before a meal. Here, the glucometer indicates that the person is in hyperglycemia.

An A1c level ≥ 6.5% meets the criteria for type 2 diabetes. There are several criteria for the diagnosis of type 2 diabetes:

  • Fasting plasma glucose level ≥ 126 mg/dL (7.0 mmol/L), where "fasting" is defined as no caloric intake for at least 8 hours, or

  • 2-hour plasma glucose level ≥ 200 mg/dL (11.1 mmol/L) during an oral glucose tolerance test, which should be performed as described by the World Health Organization, using a glucose load containing the equivalent of 75 g anhydrous glucose dissolved in water, or

  • A1c level ≥ 6.5% (48 mmol/mol), or

  • In a patient with classic symptoms of hyperglycemia or hyperglycemic crisis, a random plasma glucose level ≥ 200 mg/dL (11.1 mmol/L).

Of note, in the absence of unequivocal hyperglycemia, diagnosis requires two abnormal test results from the same sample or preferably in two separate test samples.

The European Society of Cardiology Clinical Practice Guidelines on Diabetes, Pre-Diabetes and Cardiovascular Diseases, developed in collaboration with the European Association for the Study of Diabetes, recommend that the diagnosis of type 2 diabetes should be based on A1c and/or fasting plasma glucose. If it is still in doubt, an oral glucose tolerance test can be performed.

Learn more about the diagnosis of type 2 diabetes based on glycemic levels.

Comments

3090D553-9492-4563-8681-AD288FA52ACE
Comments on Medscape are moderated and should be professional in tone and on topic. You must declare any conflicts of interest related to your comments and responses. Please see our Commenting Guide for further information. We reserve the right to remove posts at our sole discretion.
Post as:

processing....