1,543
Views
33
CrossRef citations to date
0
Altmetric
Original Article

A comparison of diabetes medication adherence and healthcare costs in patients using mail order pharmacy and retail pharmacy

, BPharm, MPH, PhD, &
Pages 203-211 | Published online: 29 Mar 2010
 

Abstract

Objective: To compare long-term diabetes medication adherence and healthcare costs in patients using mail order pharmacy versus retail pharmacy.

Methods: The MarketScan database was used to identify patients who filled prescriptions for oral anti-diabetes medications in a retail pharmacy for at least 6 months before switching to mail order pharmacy for at least 12 months. These patients were matched to others who used retail pharmacy continuously for at least 18 months. A propensity score was used to create matched groups of patients comparable on probability of switching to mail order, weighted Poisson regression was used to analyze differences in medication adherence, and Tobit regression was used to compare costs.

Results: A total of 14,600 patients who switched to mail order were matched to 43,800 patients who used retail pharmacy continuously. The average adjusted adherence in retail pharmacy was 63.4% compared to 84.8% after switching to mail order. Per-member-per-month total healthcare and total medical costs were on average $34.32 and $37.54 lower in the mail order group, respectively. Diabetes-related medical costs were on average $19.14 lower in the mail order group, while pharmacy costs were $14.13 higher.

Limitations: Limitations include a patient population under the age of 65, no information on pharmacy benefit design, and limited follow-up time relative to that necessary to identify long-term diabetes complications.

Conclusions: After adjusting for measured confounders of medication adherence and disease severity, individuals who switched to mail order pharmacy had higher medication possession ratios and trended toward lower total and diabetes-related medical costs over time.

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.