Factors influencing surgical decision-making in breast cancer: A multicenter study in Japan

Recent advances in cancer treatment and improvements in prognosis have led to increasing recognition of the critical role of shared decision-making (SDM) between patients and healthcare providers in determining treatment strategies. SDM requires not only information on surgery-related outcomes and health-related quality of life, but also consideration of patient-specific factors such as the social background. However, determinants of surgical choice among Japanese patients remain unclear, and this study aimed to identify the influencing factors.

This multicenter, cross-sectional study evaluated patient-reported outcomes in 577 Japanese patients who underwent mastectomy (MT), breast-conserving surgery (BCS), or immediate breast reconstruction (IBR). Participants completed questionnaires to assess the factors influencing surgical decision-making, including sociodemographic, psychosocial, and healthcare provider-related factors. Clinical data were obtained from the medical records, and multivariate analyses were conducted to identify the factors associated with the selection of surgical procedures.

The most frequently cited factor was the surgeon's opinion (92.2%), followed by fear of recurrence (43.8%) and partner's opinion (35.5%). Partner's opinion was significantly more influential in BCS and IBR selection than in MT selection (P = 0.012), whereas concern about recurrence was the main factor influencing MT selection (P = 0.002). Multivariate analysis suggested the nurse's opinion was significantly associated with IBR, while concern about recurrence was inversely related.

Considering that the factors influencing decision-making vary by surgical procedure, it is essential to tailor surgical choices to each patient's values and lifestyle. Strengthening decision-support systems by involving the entire healthcare team will be an important priority moving forward.