• Kentaro Taki, Momoha Koyanagi, Soshi Nagaoka, and Tomotaka Shingaki.
• Medicines Development Unit-Japan, Eli Lilly Japan K. K, Kobe, Japan.
• Curr Med Res Opin. 2020 Dec 1; 36 (12): 197519831975-1983.

ObjectiveTo evaluate insulin treatment satisfaction, safety, and effectiveness of biosimilar insulin glargine (GLY) in real-world clinical practice for Japanese patients with type 2 diabetes mellitus (T2DM) who switched from originator insulin glargine (100 U/mL) or insulin degludec treatment to GLY treatment.MethodsThe Insulin Treatment Satisfaction Questionnaire (ITSQ) was used to assess treatment satisfaction in a subgroup analysis of a post-marketing safety study. Hypoglycemia incidence rates and blood glucose control are also reported during the 12-month observation period for GLY-switched patients.ResultsOf 1104 patients with T2DM enrolled to participate, 565 patients switched from either insulin glargine U100/mL (n = 470) or insulin degludec (n = 95) to GLY. The mean total change from baseline to 3 months for total ITSQ score was 1.35 (95% confidence interval [CI] - 0.13 to 2.83, p = .073) for patients who switched from insulin glargine and 2.63 (95% CI -1.43 to 6.70, p = .195) for patients who switched from insulin degludec to GLY treatment. The mean change from baseline to 12 months in hypoglycemia events reported per month was -0.04% (95% CI -0.12 to 0.03, p = .236) for patients who switched from insulin glargine and no change for patients who switched from insulin degludec (0.00, 95% CI -0.20 to 0.20, p = 1.000). Non-significant mean changes from baseline to 12 months were observed for hemoglobin A1c and fasting plasma glucose in GLY-switched patients.ConclusionsTreatment satisfaction does not change significantly in Japanese patients with T2DM who switch to GLY from the reference product or from insulin degludec. Safety and effectiveness over a 12-month period were similar in GLY-treated patients who switched from either insulin glargine or insulin degludec.Clinicaltrials.GovNot applicable.

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