Longitudinal Trends in Patient-Reported Outcomes in the First Year After Lumpectomy Versus Mastectomy.

Background: It is unclear how patient-reported outcomes (PROs) change longitudinally after breast cancer surgery. We sought to compare trends in PROs among patients who underwent lumpectomy versus mastectomy over the first year after surgery.

Patients And Methods: Newly diagnosed stage 0-III female patients with breast cancer who underwent lumpectomy or mastectomy at an academic breast center between June 2019 and March 2023 were invited to participate in a longitudinal PRO study. Enrolled patients received the BREAST-Q™ module, a validated tool measuring domains, such as satisfaction with breasts, psychosocial well-being, physical well-being, and sexual well-being. Scores for each domain were compared between the lumpectomy and mastectomy groups over the first year after surgery. Linear mixed models were used to estimate the change in PRO scores over time.

Results: The cohort included 203 who underwent lumpectomy and 144 who underwent mastectomy. Patients who underwent lumpectomy were older, more likely to receive adjuvant radiation and endocrine therapy, and less likely to receive adjuvant chemotherapy. Patients who underwent lumpectomy demonstrated greater increases in scores over time for satisfaction with breasts, psychosocial well-being, and sexual well-being compared with patients who underwent mastectomy, after adjusting for the abovementioned covariates and receipt of reconstruction. The lumpectomy group had a larger decline in physical well-being over time compared with the mastectomy group.

Conclusions: Patients who underwent lumpectomy demonstrated greater satisfaction with their breasts, psychosocial well-being, and sexual well-being but worse physical well-being over the first year after surgery compared with patients who underwent mastectomy. These results may help inform early-stage breast cancer patients making decisions about their surgical care.