Prediabetes: Symptoms and Accurate Diagnostic Criteria
Prediabetes is a medical condition in which blood glucose levels are higher than normal but not high enough to meet the criteria for type 2 diabetes. It is often silent, so many people do not realize they have it unless they are tested.
What Prediabetes MeansPrediabetes is considered an early warning stage before diabetes develops. In this stage, the body may begin to show insulin resistance, which means glucose is not used efficiently by the cells.
Symptoms of PrediabetesMost people with prediabetes have no clear symptoms. When symptoms do appear, they are usually mild and may include increased thirst, increased hunger, fatigue, blurred vision, frequent urination, darkened skin in the neck or armpits, and slow-healing wounds.
Accurate Diagnostic CriteriaThe most reliable way to diagnose prediabetes is through blood tests, not symptoms alone. The main diagnostic tests are:Fasting plasma glucose: 100 to 125 mg/dL indicates prediabetes.
HbA1c test: 5.7% to 6.4% indicates prediabetes. Oral glucose tolerance test (OGTT): 140 to 199 mg/dL at 2 hours indicates prediabetes.
Why Diagnosis MattersEarly detection is important because prediabetes can progress to type 2 diabetes if left untreated. Identifying it early allows lifestyle changes and medical follow-up that may reduce the risk of diabetes and its complications.
Scientific SummaryPrediabetes is a clinically important metabolic state characterized by abnormal glucose regulation. Because it is usually asymptomatic, laboratory testing is essential for diagnosis. The most accepted diagnostic thresholds are fasting glucose 100–125 mg/dL, HbA1c 5.7%–6.4%, and 2-hour OGTT 140–199 mg/dL.
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