GCG and type 1 diabetes mellitus: Fasting < 0.42 nmol/l 81.0% predictive value Type 1 diabetes Fasting > 0.42 nmol/l 91.3% predictive value Type 2 diabetes Non-fasting < 0.5 nmol/l 91.5% predictive value Type 1 diabetes Non-fasting > 0.5 nmol/l 95.3% predictive value Type 2 diabetes Glucagon-stimulated < 0.6 nmol/l 93.9% predictive value Type 1 diabetes Glucagon-stimulated > 0.6 nmol/l 77.1%