I undersøgelserne sammenlignede man NovoRapid med humant insulin ved at måle niveauet for glykosyleret hæmoglobin (HbA1c), der indicerer, hvor godt blodets glukose holdes under kontrol.
The studies compared NovoRapid to human insulin by measuring over 6 months the level of glycosylated haemoglobin (HbA1c) which gives an indication of how well the blood glucose is controlled.