Table 1. Clinicopathologic features of the study population.

^aClinicopathologic features between training cohort and validation cohort were compared.

^bHER2 tests were not conducted because of insufficient tumor cells.

Abbreviations: AJCC, American Joint Committee on Cancer; GCLS, gastric carcinoma with lymphoid stroma; IHC, immunohistochemistry; MDAC, moderately differentiated adenocarcinoma; PCC, poorly cohesive carcinoma; PDAC, poorly differentiated adenocarcinoma; SISH, silver in situ hybridization; SRC, signet ring cell carcinoma; WDAC, well differentiated adenocarcinoma.