Impaired glucose tolerance
Classification and external resources
ICD-10	R73.0
ICD-9	271.3, 790.22
MeSH	D018149

Impaired Glucose Tolerance (IGT) is a pre-diabetic state of dysglycemia, 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.^[1]

Contents 1 Criteria 2 Treatment 3 References 4 Further reading 5 See also

[edit] Criteria

Diabetes mellitus Related articles
Types of diabetes
Diabetes mellitus type 1 Diabetes mellitus type 2 Gestational diabetes Prediabetes:    • Impaired fasting glycaemia    • Impaired glucose tolerance
Blood tests
Blood sugar Glycosylated hemoglobin Glucose tolerance test Fructosamine
Disease management
Diabetes management:    • Anti-diabetic drugs    • Conventional insulinotherapy    • Diabetic diet    • Intensive insulinotherapy Glossary of diabetes
Complications
Cardiovascular disease Diabetic comas:    • Diabetic hypoglycemia    • Diabetic ketoacidosis    • Nonketotic hyperosmolar Diabetic myonecrosis Diabetic nephropathy Diabetic neuropathy Diabetic retinopathy Diabetes and pregnancy

According to the criteria of the World Health Organization and the American Diabetes Association, impaired glucose tolerance is defined as^[2][3]:

• 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 one of these conditions.^[4]

[edit] Treatment

The risk of progression to diabetes and development of cardiovascular disease is greater than for Impaired fasting glycaemia.^[5]

Although some drugs can delay the onset of diabetes, lifestyle modifications play a greater role in the prevention of diabetes.^[4][6] Patients identified as having an IGT should exercise regularly and limit sugar intake.

Carnitine has been shown to improve glucose uptake, regulation, and oxidation, though temporarily (i.e., only when levels are sustained in the blood).^{[citation needed]}

[edit] References

[edit] Further reading

• Melanie J Davies, I Peter Gray (3 February 1996). "Impaired glucose tolerance". British Medical Journal 312: 264–265. PMID 8611769. http://www.bmj.com/cgi/content/full/312/7026/264.  - Editorial review

• "Impaired Fasting Glucose and Impaired Glucose Tolerance: Implications for Care". Diabetes Care 2007;30(3):753-759. American Diabetes Association, Inc.. 13 March 2007. http://www.medscape.com/viewarticle/553218_print. Retrieved July 22 2007. 

[edit] See also

• Impaired fasting glycaemia
• Glucose tolerance test

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