Comparing the Efficacy of Sintilimab Plus Nab-POF Regimen, Sintilimab Plus XELOX Chemotherapy, and Lenvatinib, Sintilimab Plus XELOX Chemotherapy in the Treatment of HER2-negative, Metastatic Gastric Cancer

Patients were randomized in a 1:1:1 ratio to three treatment groups: control group A: pembrolizumab combined with XELOX regimen, the regimen was repeated every 3 weeks, and tumor efficacy was evaluated every 2 treatment cycles. Group B: treatment regimen was pembrolizumab combined with Nab-POF regimen, the regimen was repeated every 2 weeks, and tumor efficacy was evaluated every 3 treatment cycles. Group C: treatment regimen was pembrolizumab combined with XELOX regimen and lenvatinib, the regimen was repeated every 3 weeks, and tumor efficacy was evaluated every 2 treatment cycles.