Prediabetes Diagnosis

Prediabetes is diagnosed with one of two blood testsa fasting plasma glucose test or a two-hour oral glucose tolerance test (OGTT). The fasting plasma glucose test requires an eight-hour fast (no food or drink except water), after which a blood draw is performed. It is usually done in the morning. For an oral glucose tolerance test, a patient is given a drink of 75 grams of glucose, and a blood draw is taken two hours later.

The following lab values are the American Diabetes Association (ADA) practice guidelines for the diagnosis of prediabetes diagnosis:

  • A fasting plasma glucose value between 100 to 125 mg/dl (5.56 - 6.94 mmol/l) or more (indicating impaired fasting glucose).
  • An oral glucose tolerance test plasma glucose value between 140 to 199 mg/dl (7.78 - 11.06 mmol/l) at 2 hours post-glucose load (indicating impaired glucose tolerance).
  • An A1C range of 5.7 - 6.4%.

The ADA recommends that men and women age 45 and older, especially those that are overweight (i.e., BMI of 25 or higher), be screened for prediabetes. Screening should also be considered in individuals younger than 45 if they are overweight and have one or more additional risk factors.

If testing is positive for prediabetes, a follow up test should be performed on a subsequent day to confirm the diagnosis. People with diagnosed prediabetes should receive regular retesting every one to two years to monitor for type 2 diabetes. Individuals with a normal screening result can be retested every three years.

Reviewed by Constance Brown-Riggs, MSEd, RD, CDE, CDN 01/14.

Last Modified Date: January 15, 2014

All content on dLife.com is created and reviewed in compliance with our editorial policy.

Sign up for FREE dLife Newsletters

dLife Membership is FREE! Get exclusive access, free recipes, newsletters, savings, and much more! FPO

Congratulations!
You are subscribed!
Congratulations!
You are subscribed!
Congratulations!
You are subscribed!
289 Views 0 comments
by Brenda Bell
As I mentioned in an earlier post, one of the benefits that made it cost-effective for me to go with the real healthcare (HSA) plan rather than the phony (HRA) plan is that my company is now covering "preventative" medicines at $0 copay. The formulary for these, as stated by CVS/Caremark (my pharmacy benefits provider), covers all test strips, lancets, and control solutions. I dutifully get my doctor to write up prescriptions for all of my testing needs, submit...
  • Watch dLifeTV online now!

    Click here for more info
  • Join the #1 Diabetes Community.

    Join Today!
  • Everything you need to know about Insulin.

    Click here