At Significantly Higher Risk 
• Those aged between 50 and 59. 
• Twice as frequent in lower socio-economic groups in North
  America and Western Europe.
• Workers in various industries—coal mining, nickel refining (in
  Eastern Europe), rubber and timber processing.
• Workers exposed to asbestos fibers. 
• People with pernicious anemia are 5 to 10 percent more likely to
  develop gastric cancer. 
• People whose diet contains smoked, highly salted and barbecued
  foods. Japanese immigrants have a decreased incidence of this
  cancer when they adopt an American diet and lifestyle, a tenfold
  drop after two generations.