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Variation in open access vildagliptin use in Waikato patients with type 2 diabetes.

AIM
To determine what the variation was in the initial use of vildagliptin in patients with type 2 diabetes following approval of open access funding in October 2018, including by ethnicity, gender, age, funding model and patient HbA1c levels.


METHODS
Data were collected from 31 general practices for all adult patients with type 2 diabetes. National Health Index-matched medication data were obtained from the national Pharmaceutical Collection. Patients were included for analysis if they had received at least one diabetes medication in the 12 months prior to funding approval for vildagliptin. The proportion of patients who initiated vildagliptin therapy following open access funding approval was then evaluated, as was the time taken until the first dispensing (days since funding approval).


RESULTS
A total of 724 of 3,971 (18.2%) of patients initiated vildagliptin therapy; mean time to first dispensing was 192.1±112.4 days. In logistic regression, Asian patients were more likely and Māori less likely to receive vildagliptin than Europeans. Younger patients and those with an HbA1c of >64mmol/mol were also more likely to initiate therapy. Vildagliptin use by general practice ranged from 0.0-82.4%.


CONCLUSIONS
Despite open access funding, there was inequity in the initial use of vildagliptin. Substantial variation by general practice indicates that practitioner education may be needed to ensure appropriate and early adoption of new diabetes medications.