Understanding treatment patterns and outcomes for advanced hormone-sensitive breast cancer

This is a real-world observational study that tracks patients with advanced hormone-sensitive, HER2-negative breast cancer who are starting or have recently started their second line of cancer treatment. The study combines past medical records with ongoing follow-up to understand which treatments doctors prescribe and how well they work for patients in China. By gathering this information from actual clinical practice, researchers hope to better understand what treatment patterns lead to the best outcomes.

Current knowledge about how second-line treatments work in real-world settings—outside of controlled clinical trials—is limited. This study exists to fill that gap by learning what treatments are actually used, how patients respond, and what outcomes they experience, so doctors can make better treatment decisions for future patients.