The 28-week, prospective, multicenter, open-label OPTIMIZE study, conducted in Belgium and Canada, evaluated treatment optimization with once-daily (OD) Gla-300 in combination with a prandial rapid-acting insulin analog in adults with T1DM previously uncontrolled (HbA1c 8-10%) on twice-daily (BID) basal insulin as part of basal-bolus therapy.

The intent-to-treat (ITT) and safety populations of the Belgian cohort comprised 48 patients (52.1% women); mean (SD) age 51.7 (12.8) years and mean (SD) body mass index 28.2 (4.9) kg/m². Prior to the study, 37.5% were on insulin glargine 100 U/mL and 62.5% were on insulin detemir. There was a statistically significant reduction in HbA1c from baseline to month 6 (primary endpoint, p<0.0001). No significant changes were observed in basal or prandial insulin dose, or in total or nocturnal hypoglycemic event rates. Statistically significant improvements were seen in the Diabetes Treatment Satisfaction Questionnaire (DTSQ) total and perceived hyperglycemia scores (p<0.05) (Table), and in the patient satisfaction score for number of injections (p=0.004).

Switching from a BID basal insulin analog to OD Gla-300 in this challenging T1DM population was associated with a statistically significant improvement in HbA1c levels and better overall treatment satisfaction.


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