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Diagnostic Tests for Diabetes*

* To definitively diagnose diabetes, a positive result must be repeated on a separate day.
Source: Caring for Your Teenager (© 2003 American Academy of Pediatrics)

	Fasting Blood-Glucose Test	Random Blood-Glucose Test	Two-Hour (Postload) Blood-Glucose Test
Preparation	Patient must fast beforehand	No fasting necessary; can be performed any time of day	Patient must fast beforehand
Description	Blood sample is drawn and analyzed	Blood sample is drawn and analyzed	Blood sample is drawn and analyzed Patient eats a meal or drinks a sweet glucose sy After 2 hours, blood is drawn again and analyzed
Results Confirming Diabetes	126 mg/ml or higher	200 mg/ml or higher, accompanied by diabetic symptoms	200 mg/ml or higher