Similar glycaemic control with less nocturnal hypoglycaemia in a 38-week trial comparing the IDegAsp co-formulation with insulin glargine U100 and insulin aspart in basal insulin-treated subjects with type 2 diabetes mellitus

Diabetes Res Clin Pract. 2019 Jan:147:157-165. doi: 10.1016/j.diabres.2018.10.024. Epub 2018 Nov 16.


Aims: To confirm non-inferiority of insulin degludec/insulin aspart (IDegAsp) once-daily (OD) versus insulin glargine (IGlar) U100 OD + insulin aspart (IAsp) OD for HbA1c after 26 weeks, and compare efficacy and safety between groups at W26 + W38.

Methods: A 38-week, randomised, open-label, treat-to-target (HbA1c < 7.0%) trial in adults with type 2 diabetes mellitus (on basal insulin ± oral antidiabetic drugs; HbA1c 7.0-10.0%). Randomisation (1:1): IDegAsp or IGlar U100 + IAsp. Intensification to IDegAsp twice daily (BID) was permitted at W26 + W32, or with additional IAsp injections at W26 (maximum IAsp BID) or W32 (maximum IAsp three-times daily).

Results: For W0-W26, mean percentage-change (standard deviation) HbA1c was: IDegAsp, -1.1 (0.9); IGlar U100 + IAsp, -1.1 (0.8); estimated treatment difference: 0.07% (95% confidence interval [CI]: -0.06; 0.21) confirmed non-inferiority. At W26 and W38, target HbA1c achievement, and mean fasting and postprandial glucose were similar across groups. At W38, more subjects achieved target HbA1c without hypoglycaemia with IDegAsp (22.5%) than with IGlar U100 + IAsp (21.1%), with significantly fewer nocturnal episodes (W0-W38, estimated rate ratio: 0.61 [95% CI: 0.40; 0.93]). Safety profiles were similar across treatment groups throughout.

Conclusions: IDegAsp OD/BID are effective treatment intensification options versus multiple injection basal-bolus therapies, achieving similar glycaemic control, with significantly less nocturnal hypoglycaemia.

Keywords: Aspart; Co-formulation; Diabetes; Glargine; Hypoglycaemia; IDegAsp.

Publication types

  • Multicenter Study
  • Randomized Controlled Trial

MeSH terms

  • Diabetes Mellitus, Type 2 / drug therapy*
  • Diabetes Mellitus, Type 2 / pathology
  • Female
  • Humans
  • Hypoglycemia / etiology*
  • Hypoglycemia / pathology
  • Hypoglycemic Agents / pharmacology
  • Hypoglycemic Agents / therapeutic use*
  • Insulin Aspart / pharmacology
  • Insulin Aspart / therapeutic use*
  • Insulin Glargine / pharmacology
  • Insulin Glargine / therapeutic use*
  • Male
  • Middle Aged


  • Hypoglycemic Agents
  • Insulin Glargine
  • Insulin Aspart