showed a trendp = 0.074
As expected, we found that patients with lower baseline observed species and Chao1 indices had significantly prolonged PFS ( p = 0.0015 for observed species and p = 0.013 for Chao1, Figure 1C ), and patients with a lower Shannon index also showed a trend towards increased PFS ( p = 0.074, Figure 1C ) in those who received immunotherapy combined with chemotherapy.