This is a randomized, multicenter, phase 3 study to evaluate the efficacy and safety of sintilimab combined with ramucirumab as compared to stand of care chemotherapy for the first-line treatment of PD-L1 positive, unresectable locally advanced or metastatic gastric or gastroesophageal junction adenocarcinoma.~The primary endpoint of this study is OS of the ITT population.
The main purpose of this study is to evaluate the efficacy and safety of sintilimab plus ramucirumab compared to stand of care first-line chemotherapy in participants with advanced gastric or esophagogastric adenocarcinoma.