Management of Prediabetes in Adolescents

Diagnostic Interpretation

The discordance between glucose and HbA1c values requires clarification of when the glucose was measured—if this was a random or fasting glucose of 140 mg/dL, it suggests impaired glucose regulation but does not meet diabetes diagnostic criteria (fasting ≥126 mg/dL or random ≥200 mg/dL with symptoms), as stated by the American Diabetes Association 1, 2

Initiate comprehensive lifestyle intervention immediately, including behavioral counseling for healthful nutrition and physical activity changes, as this is first-line therapy for prediabetes in adolescents, according to the American Diabetes Association 3
Prescribe at least 60 minutes of moderate to vigorous physical activity daily, with muscle and bone strength training at least 3 days per week, as recommended by the American Diabetes Association 3
Implement nutrition counseling emphasizing more nonstarchy vegetables, whole fruits, legumes, whole grains, nuts and seeds, and low-fat dairy products while eating less meat, sugar-sweetened beverages, sweets, refined grains, and processed foods, as suggested by the American Diabetes Association 3
Target at least 7-10% decrease in excess weight if the patient has overweight or obesity, as obesity significantly increases prediabetes prevalence, according to the American Diabetes Association 3

The American Diabetes Association guidelines reserve metformin for youth with confirmed type 2 diabetes (A1C ≥6.5% or fasting glucose ≥126 mg/dL), not for prediabetes management in this age group, as stated by the American Diabetes Association 2, 3

Repeat HbA1c and fasting glucose in 3 months to reassess glycemic status and determine if progression toward diabetes is occurring, as recommended by the American Diabetes Association 4
If repeat testing shows HbA1c ≥6.5% (48 mmol/mol) or fasting glucose ≥126 mg/dL on two occasions, diagnose diabetes and initiate pharmacologic therapy with metformin (if A1C <8.5% and asymptomatic), according to the American Diabetes Association 2, 3

If the patient develops A1C ≥8.5% or blood glucose ≥250 mg/dL with symptoms (polyuria, polydipsia, nocturia, weight loss), initiate long-acting insulin at 0.5 units/kg/day along with metformin, as recommended by the American Diabetes Association 2, 3
If ketosis or ketoacidosis develops, immediately start subcutaneous or intravenous insulin to correct hyperglycemia and metabolic derangement, according to the American Diabetes Association 2, 3

Provide diabetes self-management education that is developmentally and culturally appropriate, based on a chronic care model, as suggested by the American Diabetes Association 3