A Real-world Study of Effectiveness and Safety in HR+/HER2- Breast Cancer Patients Treated With Ribociclib or Alpelisib

Real-world Effectiveness and Safety in HR+/HER2- Advanced or Metastatic BC Patients Treated With Ribociclib or Alpelisib: A European Non-interventional Retrospective Study (REASSURE)

This study was a multinational and multicenter cohort study of patients with hormone receptor-positive/human epidermal growth factor receptor 2-negative (HR+/HER2-) advanced or metastatic breast cancer (aBC/mBC) treated with ribociclib or alpelisib between the period of 01 January 2018 and 30 September 2021. Patients who were receiving active treatment for malignancies other than BC or participating in a clinical trial were excluded. This study was conducted retrospectively with secondary use of data.

Inclusion criteria:

• Confirmed diagnosis of locally advanced/metastatic not amenable to surgery HR+/HER2- BC (progressed following prior therapy or de novo) for whom the treating physician took the decision to initiate treatment with ribociclib or alpelisib.
• Patients with at least one prescription for ribociclib or alpelisib during the index period (01 January 2018 to 30 September 2021).

Exclusion criteria:

• Patients who were participating in any interventional clinical trial that included investigational or marketed products at the time of index (ribociclib, alpelisib, and other); patients who were participating in other investigator-initiated research or non-interventional study (NIS) could be included as long as their standard of care was not altered by the study.

• Patients on active treatment for malignancies other than HR+/HER2- aBC/mBC at the time of index.

• IPO-Porto cohort only:

  • Patients who had participated or were participating in any interventional clinical trial that included investigational or marketed products at the time of index (ribociclib, alpelisib, and others).
  • Patients who underwent part of the treatment for locally advanced/metastatic not amenable to surgery HR+/HER2- BC outside the center.