Fig. 4

Kaplan–Meier curve of PFS for patients with different %divided of CD8⁺ T cells. The median PFS in patients with high %divided of CD8⁺ T cells subset percentage (≥ 85.0%) was significantly benefit compared with that in patients with low %divided of CD8⁺ T cells subset percentage (< 85.0%), 3.0 vs. 7.0 months HR: 0.3247, 95% CI 0.1503 to 0.7014, p = 0.0016, log-rank test