Diabetes Glossary

Browse or search for definitions from our comprehensive list of diabetes terms.

Definition

impaired glucose tolerance

IGT

a condition in which blood glucose levels are higher than normal but are not high enough for a diagnosis of diabetes. IGT, also called pre-diabetes , is a level of 140 mg/dL to 199 mg/dL 2 hours after the start of an oral glucose tolerance test. Most people with pre-diabetes are at increased risk for developing type 2 diabetes. Other names for IGT that are no longer used are "borderline," "subclinical" or "chemical" diabetes.

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    Our glossary includes and builds on the definitions found in The Diabetes Dictionary (NIH Publication No. 07-3016, October 2006) published by the National Diabetes Information Clearinghouse, which is available on their website and is not copyrighted. The Clearinghouse encourages users of this publication to duplicate and distribute as many copies as desired.

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