Overall clinical outcomes
As shown in Figure 1A, Objective Radiographic Responses (ORR) was observed in 19 of 78(24.36%) patients, and the disease control rate (DCR) was 69.23% (54/78). No patient achieved a complete response. The median PFS was 6.49 months with a 95% CI of 3.71-9.27 months (Figure 1B). Among those 19 patients who achieved a partial response, 17 were treated with the combination chemotherapy/bevacizumab and only 2 had the PD-1 inhibitor monotherapy, but the results showed no statistically significant difference.