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 zolbetuximab, Pembrolizumab, or Capecitabine. The registry lists allocation as randomized. Zolbetuximab is being studied in people with cancer in and around the stomach or where the food pipe (esophagus) joins the stomach, called gastroesophageal junction (GEJ) cancer.
They plan to enroll about 500 people at 252 sites. Taking part typically means taking a study drug (or dummy pill) plus check-ins.
Official title (unrewritten)
A Phase 3, Double-blind, Randomized Study of Zolbetuximab in Combination With Pembrolizumab and Chemotherapy (CAPOX or mFOLFOX6) in First-line Treatment of Locally Advanced Unresectable or Metastatic Gastric or Gastroesophageal Junction Adenocarcinoma in Participants Whose Tumors Are HER2-negative, Claudin (CLDN) 18.2-positive and Programmed Death-ligand 1 (PD-L1)-Positive
Interventions: zolbetuximab, Pembrolizumab, Capecitabine, Oxaliplatin, Folinic acid (leucovorin or local equivalent), 5-fluorouracil (5-FU), Placebo
Primary outcome (registry wording): Overall Survival (OS)