What is the survival rate of stomach cancer in its early stage?

Unfortunately... It really depends on the total staging of the gastric cancer. "early stage" might mean something different for you and me. If you have the t stage, nodal stage, and metastasis information, it will help clarify what stage and survival rates.
NCI SEER Data. 2001-2007, all races, both sexes stage at diagnosis stage distribution 5-year relative survival (%) localized (confined to primary site) 61.5 regional (spread to regional lymphnodes) 27 distant (cancer has metastasized) 3.7 unknown (unstaged) 16.