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Pre-diabetes

Prediabetes
Classification and external resources
ICD-10 R73.0
ICD-9-CM 790.29
MeSH D011236
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Prediabetes is the precursor stage before diabetes mellitus in which not all of the symptoms required to diagnose diabetes are present, but blood sugar is abnormally high. This stage is often referred to as the "grey area." It is not a disease; the American Diabetes Association says, "Prediabetes should not be viewed as a clinical entity in its own right but rather as an increased risk for diabetes and cardiovascular disease (CVD). Prediabetes is associated with obesity (especially abdominal or visceral obesity), dyslipidemia with high triglycerides and/or low HDL cholesterol, and hypertension." It is thus a metabolic diathesis or syndrome, and it usually involves no symptoms and only high blood sugar as the sole sign.

Impaired fasting glycemia and impaired glucose tolerance are two forms of prediabetes that are similar in clinical definition (glucose levels too high for their context) but are physiologically distinct.Insulin resistance, the insulin resistance syndrome (metabolic syndrome or syndrome X), and prediabetes are closely related to one another and have overlapping aspects.

Impaired fasting glycaemia or impaired fasting glucose (IFG) refers to a condition in which the fasting blood glucose or the 3-month average blood glucose (A1C) is elevated above what is considered normal levels but is not high enough to be classified as diabetes mellitus. It is considered a pre-diabetic state, associated with insulin resistance and increased risk of cardiovascular pathology, although of lesser risk than impaired glucose tolerance (IGT). IFG sometimes progresses to type 2 diabetes mellitus. There is a 50% risk over 10 years of progressing to overt diabetes. Many newly identified IFG patients progress to diabetes in less than three years. IFG is also a risk factor for mortality.


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