Interestingly, patients with moderate differentiation, ≤ 2 metastatic sites, and a baseline plasma meanVAF < 2.29% exhibited a trend towards improved PFS, although these observations did not reach statistical significance (Hazard Ratio [HR] 0.24, 95% Confidence Interval [CI] 0.05–1.09, P = 0.065; HR 0.22, 95% CI 0.05–1.02, P = 0.052; HR 0.36, 95% CI 0.13–1.02, P = 0.055, respectively) (The cutoff values for maxVAF < 2.54% and meanVAF < 2.29% were based on median values).
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Plasma circulating tumor DNA unveils the efficacy of PD-1 inhibitors and chemotherapy in advanced gastric cancer.
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0.0650
0.0750
The sentences
showed a trendP = 0.069
However, it is noteworthy that the presence of detectable ctDNA post-treatment showed a trend towards worse OS (HR 7.13, 95% CI 0.86–59.3, P = 0.069).
near-significantP = 0.075
Importantly, baseline plasma meanVAF < 2.29% showed near-significant potential in predicting PFS (HR 0.08, 95% CI 0.01–1.28, P = 0.075), potentially serving as an independent predictor of PFS (Tables S3 and S4 ).