Diabetes Forecast

Prediabetes and You

By Erika Gebel, PhD , ,

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Prediabetes is diagnosed when blood glucose is higher than normal but not high enough for a diagnosis of type 2 diabetes.

Do You Have Prediabetes?

The Diabetes Prevention Program study proved that for people with prediabetes, the development of type 2 diabetes could be prevented or delayed through lifestyle changes. The National DPP will enroll adults who have been diagnosed with prediabetes based on a blood test or are at high risk for prediabetes. A body mass index over 24 (or 22 for people of Asian descent), a family history of diabetes, older age, getting little physical activity, and having had gestational diabetes all increase the likelihood that a person has prediabetes and should enroll in the program.

Diagnosis Numbers

Three types of blood tests are used to diagnose diabetes and prediabetes. The A1C is a measure of average blood glucose over the previous two to three months. The fasting plasma glucose (FPG) tests your blood glucose level on an empty stomach. The oral glucose tolerance test (OGTT) measures blood glucose before and two hours after drinking a syrupy glucose solution. Here's what the test results tell you.

Diagnosis A1C FPG OGTT
DIABETES 6.5% and above 126 mg/dl and above 200 mg/dl and above
PREDIABETES 5.7% to 6.4% 100 to 125 mg/dl 140 to 199 mg/dl
NORMAL Less than 5.7% Less than 100 mg/dl Less than 140 mg/dl

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