Fig. 3

Subgroup analyses on overall survival between groups B and C. High /Median/Median-Low …, High/Median/Median-Low differentiation adenocarcinoma; Low differentiation …, Low differentiation adenocarcinoma/Mucinous adenocarcinoma/Signet-ring cell carcinoma; HR, hazard ratio; CI, confidence interval; P < 0.05, statistically significant