While across the entire U.S. population the incidence of a certain type of stomach cancer has been declining in the past three decades, among white adults ages 25 to 39, non cardia gastric cancer — or cancer of the lower stomach — has actually increased, according to a new analysis published this week in the Journal of the American Medical Association.

Researchers found that, while from 1977 to 2006, annual incidence of lower stomach cancer dropped from 5.9 per 100,000 to 4.0 among whites, 13.7 to 9.5 among blacks, and 17.8 to 11.7 in other races, when they parsed the data by both ethnicity and age, for all groups other than young whites, cancer rates dropped or remained stable. Among white adults ages 25 to 39, rates increased from 0.27 per 100,000 in 1977 to 0.45 in 2006.