Participants
The population was composed of women with breast cancer using adjuvant EHT consulting the Medical Oncology Clinic. Power analysis was conducted and it was determined that 64 patients were required in the study; treatment group (n=31) and control group (n=33). Participants, aged 18- 65, diagnosed with primary breast cancer, non-metastatic, hormone receptor positive (ER + and / or PgR +) and treatment with EHT used at least for three months, having a smartphone that meets the app requirements were included.