Abstract PO3-12-06: The pilot study for a mobile-based monitoring solution to manage menopausal symptoms of premenopausal breast cancer patients with endocrine therapy
Authors: Shin Dong Seung , Ryu Jai Min , Chae Byung Joo , Lee Jeong Eon , Kim Seok Won , Nam Seok Jin , Yu Jonghan 
Published: May 2024

Abstract
Background
Endocrine therapy (ET) is the most important treatment for hormone receptor (HR)-positive breast cancer (BC) patients. Each of the endocrine medications, such as aromatase inhibitors (AIs), luteinizing hormone-releasing hormone (LHRH) analogs, and selective estrogen receptor modulators, has its own set of side effects, and these might lead to poor drug adherence and eventual discontinuation. There are few systematic monitoring systems for menopausal symptoms of patients on ET. We conducted a prospective, pilot study through the mobile platform-based monitoring solution which contains a questionnaire about menopausal symptoms to assess the feasibility of the solution.
Methods
We screened and collected data from HR-positive BC patients who underwent surgery at a single institution from May 2022, until recruiting a total of 20 patients. Patients scheduled for postoperative ET at age 50 or younger were included. Preoperatively confirmed metastatic BC patients were excluded. A total of 19 patients were enrolled, excluding one patient who self-discontinued medication. Menopause Rating Scale (MRS) surveys were periodically administered to the patients using a mobile platform-based solution to collect responses during first 3 months of ET. The primary endpoint of this study was the response rate of the patients, and the second endpoint was MRS scores and patient satisfaction. At the time of initial enrollment before the start of ET, MRS was collected using a paper questionnaire. The concordance rate of MRS response using a paper questionnaire and this solution was compared. We also conducted a user evaluation at the end of the third month of ET to determine satisfaction. The data collected from the solution were used by physicians to assist in patient care for clinical use.
Results
The median age of the cohort was 39 (range 29-47). Six patients were treated with Tamoxifen alone, Tamoxifen with LHRH analog in 12 patients, and AI with LHRH analog in 1 patient. There were 3 (15.8%) of pTis, 13 (68.4%) of pT1, and 3 (15.8%) of pT2, as well as 18 (94.7%) of pN0 and 1 (5.3%) patients of pN1. The total response rate of patients to the solution during the study period was 84.5%. Each symptom has different response rates and MRS scores, from 70.2% for sex-related symptoms to 95.4% for joint pain, and from 1.24 out of 4 for sleep disturbances to 0.45 out of 4 for vaginal dryness. The match rate between mobile and paper surveys was 90.0%. The overall satisfaction score for the solution of patients was 8.06 out of 10, with the highest score (8.79 out of 10) given in terms of using patients’ responses in outpatient appointments with the physician.
Conclusion
The analysis of MRS using this mobile solution in premenopausal BC patients undergoing postoperative ET is expected to be feasible for clinical use and should be analyzed in a large-scale study in the future.
Citation Format: Dong Seung Shin, Jai Min Ryu, Byung Joo Chae, Jeong Eon Lee, Seok Won Kim, Seok Jin Nam, Jonghan Yu. The pilot study for a mobile-based monitoring solution to manage menopausal symptoms of premenopausal breast cancer patients with endocrine therapy [abstract]. In: Proceedings of the 2023 San Antonio Breast Cancer Symposium; 2023 Dec 5-9; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2024;84(9 Suppl):Abstract nr PO3-12-06.