Use of a web-based app to improve breast cancer symptom management and aromatase inhibitor adherence.

Abstract

89 Background: For postmenopausal women with hormone receptor-positive breast cancer, long-term use of aromatase inhibitors (AI) significantly reduces the risk of cancer recurrence and improves disease free and overall survival. Despite the known benefits of AIs, many patients are nonadherent due to adverse side effects. We conducted a pilot randomized controlled trial of a web-enabled application (app) to provide real-time monitoring and better management of treatment-related adverse symptoms among patients with hormone-receptor positive breast cancer and a new AI prescription. Methods: Eligible patients who agreed to participate were randomized into either: App: had access to the app and received weekly reminders to use it; or Usual Care: had access to the app but did not receive reminders. Concerning responses and trends triggered email alerts to the patient’s providers, who then could review responses to manage ongoing treatment and make therapeutic adjustments. The main analyses compared overall AI adherence using the Morisky Medication Adherence Scale and quality of life using the Functional Assessment of Cancer Therapy Endocrine Symptoms (FACT-ES). Results: We enrolled 44 patients, 21 in the App and 23 in the Usual Care groups; 83% of patients approached agreed to participate, 23% were African-American, and 32% were over the age of 65. Overall, 74% of participants in the App group used the app at least once per week compared with 38% in the Usual Care group (p<0.01). Reported AI adherence at 8 weeks after initiation was significantly higher among App compared with the Usual care group at 8 weeks (100% vs. 72%, p=0.01). Using a differences-in-differences analysis, we found a substantially larger decrease in quality of life in the Usual Care group compared with the App (-11.5 vs. -3.9, p=0.191), although this difference did not reach statistical significance. Conclusions: App use with weekly reminders significantly improved short-term AI adherence. If short-term gains in adherence persist, this low-cost intervention could improve survival outcomes for women with hormone-receptor positive breast cancer.