What this phase means
Phase 3: this treatment already looked useful in smaller studies. Now it is tested in a large group, often against standard care or a dummy treatment, to see if it should be approved.
Phase labels are FDA/ICH categories applied to the registry Phase field. They are not a finding that this study succeeded.
What the registry says happens
If you join, the listed intervention(s) are Saruparib (AZD5305), Camizestrant, or Abemaciclib. The registry lists allocation as randomized. The primary objective of the study is to measure how well it works of saruparib (AZD5305) plus camizestrant compared with physician's choice CDK4/6i plus ET in patients with BRCA1, BRCA2, or PALB2m, HR-positive, HER2-negative (defined as IHC 0, 1+, 2+/ ISH non-amplified) advanced breast cancer
They plan to enroll about 788 people at 259 sites. Taking part typically means taking a study drug (or dummy pill) plus check-ins.
Official title (unrewritten)
A Randomised, Open-Label, Phase III Study of Saruparib (AZD5305) Plus Camizestrant or Plus Endocrine Therapy, Compared With Physician's Choice CDK4/6 Inhibitor Plus Endocrine Therapy or Plus Camizestrant for the First-Line Treatment of Patients With BRCA1, BRCA2, or PALB2 Mutations and Hormone Receptor Positive, HER2-Negative (IHC 0, 1+, 2+/ ISH Non-amplified) Advanced Breast Cancer (EvoPAR-Breast01)
Interventions: Saruparib (AZD5305), Camizestrant, Abemaciclib, Ribociclib, Palbociclib, Fulvestrant, Letrozole, Anastrozole, Exemestane
Primary outcome (registry wording): Progression-Free Survival (Arm 1 vs arm 2)