What is the borderline level of blood glucose that indicates prediabetes during an OGTT?

The borderline level of blood glucose indicating prediabetes during an Oral Glucose Tolerance Test (OGTT) is indeed categorized as 140 to 199 mg/dL. This range serves as a critical indicator for identifying individuals who may be at increased risk for developing type 2 diabetes. In the context of the OGTT, a glucose reading falling within this range suggests that the body is not processing glucose effectively but has not yet reached the threshold for a diabetes diagnosis.

The other levels mentioned do not indicate prediabetes according to standard diagnostic criteria. Blood glucose levels less than 100 mg/dL are considered normal, while levels from 100 to 125 mg/dL indicate impaired fasting glucose rather than prediabetes based on an OGTT. A reading of 200 mg/dL or higher is diagnostic of diabetes. Understanding these thresholds is important for the assessment and management of patients at risk for diabetes, helping clinicians to implement early interventions that can prevent the progression to full-blown diabetes.