Summary of gene methylation and GC prognosis in the component studies.

1The prognostic outcome was based on disease-free survival (DFS). The brackets displayed the p-value for studies that showed significance. NS: Not significant.1. 本研究的预后结局以无病生存期（disease-free survival, DFS）作为评估指标。括号内标注的为具有统计学显著性的研究所对应的p值；NS代表无统计学显著性（Not significant）。