The Effect of Mobile Application-Assisted Nursing Services on Symptom Control in Breast Cancer Patients

Breast cancer is the most prevalent malignancy among women in Türkiye, representing approximately one-fourth of all female cancers. Chemotherapy remains a cornerstone of treatment but often causes multiple physical and psychological side effects. Common symptoms such as fatigue, nausea, alopecia, sleep disturbances, skin and nail changes, and emotional stress complicate self-management and reduce quality of life. Mobile health (mHealth) applications offer an innovative approach for patients to self-monitor symptoms, access educational materials, and communicate with healthcare professionals in real time. Recent evidence indicates that mHealth-based nursing interventions can improve symptom control, enhance self-efficacy, and support adherence to non-pharmacological management strategies during chemotherapy. This randomized controlled experimental study aims to evaluate the effectiveness of a mobile application-assisted nursing intervention on symptom management, self-efficacy, and quality of life among women diagnosed with breast cancer and receiving chemotherapy. The study will be conducted in the chemotherapy unit of a training and research hospital in Istanbul, Türkiye. A total of 74 participants will be randomly assigned to either the intervention or control group using a computer-generated randomization system (random.org). The intervention group will receive routine nursing care plus access to a specifically designed mobile application developed for this study. The mobile application includes: A symptom monitoring module for daily recording of symptom severity using the Edmonton Symptom Assessment Scale (VAS 0-10). Educational and behavioral guidance on fatigue management, nutrition, sleep hygiene, and coping with nausea. Interactive features providing daily reminders, self-care tips, and remote nursing follow-up capabilities. Participants in the intervention group will actively use the mobile application throughout their chemotherapy protocol (4AC-12 Paclitaxel regimen, approximately 16 weeks). The control group will receive standard nursing care only. Inclusion Criteria Women aged 18 years or older Diagnosed with breast cancer Undergoing the 4AC-12 Paclitaxel chemotherapy protocol Literate and able to communicate effectively Owning a smartphone Able to use a smartphone and mobile application Voluntarily consenting to participate in the study Completing all required data collection forms Exclusion Criteria Individuals with cardiac disease Individuals with liver or renal failure Individuals unable to use a smartphone or the mobile application Individuals who withdraw from the study at any stage Participants with incomplete or missing data for any reason Outcome Measures Primary Outcome: Change in symptom severity measured by the Edmonton Symptom Assessment Scale (VAS 0-10) at baseline, mid-intervention, and post-intervention. Secondary Outcomes: Change in self-efficacy level, measured using the Self-Efficacy Scale. Change in quality of life, measured by the EORTC QLQ-C30 or Quality of Life Scale at three time points (T0, T1, T2). Study data will be collected electronically through the mobile application and analyzed using appropriate statistical methods (descriptive statistics, paired and independent t-tests, and regression analysis). This study is expected to provide scientific evidence for the use of mobile health technologies as supportive nursing tools in oncology care, demonstrating their potential to enhance symptom management, strengthen self-efficacy, and improve patients' quality of life during chemotherapy.