Two-Way Clinical Messaging in a CML Specialty Pharmacy Service Model

Adherence to treatment is correlated with treatment success in chronic myeloid leukemia (CML). CVS Specialty explored novel methods to improve adherence in this population to ensure optimal adherence and lower the risk of unsuccessful treatment. One novel program explored involved an interactive 2-way clinical messaging technology that coaches patients with adherence and knowledge about taking their treatment and managing their conditions. Clinical secure messaging is a 2-way messaging program distinct from the 1-way refill reminders and order status messages that patients were receiving if opted into the messaging program.

To assess the effect on adherence of 2-way clinical messaging in a CML population treated with tyrosine kinase inhibitors (TKIs) compared with patients enrolled in 1-way refill reminders.

A retrospective cohort study was conducted using prescription claims data. Patients new to TKI therapy and enrolled in at least 1-way messaging were identified and divided into control and study cohorts based on clinical messaging enrollment status. Participants were followed for 365 days after their first fill. Adherence outcomes were defined by medication possession ratio (MPR), length of therapy, first fill drop-off rate, and gap days between refills. Optimal adherence was defined as an MPR ≥ 85%.

Patients receiving clinical messaging had on average a 7.64% higher MPR score (MPR: 73.94% vs. 66.30%) compared with the control arm (P = 0.0063). This translates to 22% more patients being optimally adherent while exposed to clinical messaging (P = 0.022). Patients in the exposed group had a mean 32-day increase in average length of therapy compared with the control group (243 days vs. 275 days, P = 0.0043), potentially driving an increase in adherence. Additional drivers included a 5.4 percentage point reduction in first fill drop-off rates (4.66% vs. 10.04%, P = 0.0149). Persistency after 12 months was similar between the study arms (41%).

Two-way clinical messaging positively affected adherence outcomes in a CML population. This effect was in addition to 1-way refill reminders and order status messages. The nature of the clinical content encourages further investigation into this novel execution of adherence coaching and counseling through a digital platform.

Funding for this research was provided by CVS Health. The sponsor was involved at all stages of the study's conduct and reporting. Sawicki and Friend are employed by CVS Health. The other authors were employed by CVS at the time of this study. The authors have nothing more to disclose. Posters based on this work were presented at the AMCP Managed Care & Specialty Pharmacy Annual Meeting 2016; April 19-22, 2016; San Francisco, CA, and AMCP Nexus 2016; October 3-6, 2016; National Harbor, MD.