Impaired glucose tolerance
|Impaired glucose tolerance|
|Classification and external resources|
Impaired glucose tolerance (IGT) is a pre-diabetic state of hyperglycemia that is associated with insulin resistance and increased risk of cardiovascular pathology. IGT may precede type 2 diabetes mellitus by many years. IGT is also a risk factor for mortality.
- two-hour glucose levels of 140 to 199 mg per dL (7.8 to 11.0 mmol) on the 75-g oral glucose tolerance test. A patient is said to be under the condition of IGT when he/she has an intermediately raised glucose level after 2 hours, but less than would qualify for type 2 diabetes mellitus. The fasting glucose may be either normal or mildly elevated.
From 10 to 15 percent of adults in the United States have impaired glucose tolerance or impaired fasting glucose.
Although some drugs can delay the onset of diabetes, lifestyle modifications play a greater role in the prevention of diabetes. Patients identified as having an IGT should exercise regularly, lose 5 to 7 percent of body weight, and limit intake of (at least) sugar and highly processed carbohydrates. America is known to have a higher percentage of diabetes due to the average intake of sugar and high carbohydrate food consumed by the general population.
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- Nathan, DM; Davidson, MB; DeFronzo, RA; Heine, RJ; Henry, RR; Pratley, R; Zinman, B; American Diabetes, Association (2007 Mar). "Impaired fasting glucose and impaired glucose tolerance: implications for care.". Diabetes care 30 (3): 753–9. doi:10.2337/dc07-9920. PMID 17327355.