Methods: This 3-year prospective project will be divided into four phases: (1) Exploration of the IP-SDM needs of continuous breast cancer rehabilitation: We will interview breast cancer patients and consult breast cancer care professionals with different disciplines to understand the IP-SDM needs of breast cancer rehabilitation in each treatment period. (2) Development of communication and decision aids: An expert panel will develop a mobile application prototype of communication and decision aids. The prototype will be testes for the understandability and applicability by breast cancer patients. (3) Development of decision coaching and IP-SDM training programs: We will consult experts to develop a decision coaching training program for breast cancer patients and an IP-SDM training program for interprofessional rehabilitation team. (4) Evaluation of the effectiveness of the patient-centered continuous and interdisciplinary shared decision making approach for breast cancer rehabilitation: We will conduct a parallel-group, single-blinded randomized controlled trial and recruit 116 breast cancer patients at Taipei Medical University Hospital to evaluate the effectiveness of the IP-SDM approach.

Expected results and impacts: We expect that the patient-centered continuous and interdisciplinary shared decision making approach for breast cancer rehabilitation will effectively improve patients' IP-SDM self-efficacy, quality of IP-SDM process, patients' satisfaction with decision, concordance between preferences and the chosen options, patients' upper limb function and health-related quality of life. In the future, this IP-SDM approach will be promising to be applied to other medical institutions and other cancer populations, so as to enhance patient-centered, interprofessional and continuous practice in cancer care.