Rates of stomach cancer are disproportionate amongst New Zealand Māori compared to non-Māori. These researchers sought to better understand the reasons for this phenomenon and to identify priorities for prevention. 165 Māori stomach cancer cases from the New Zealand Cancer Registry between 1 February 2009 and 31 October 2013 were matched by 5-year age bands with 480 Māori controls randomly selected from the New Zealand electoral roll. Nearly half (47.9%) of cases were of the diffuse subtype. There were differences in the distribution of risk factors between cases and controls. In logistic regression analysis, stomach cancer risk was strongly increased by having >2 people sharing a bedroom in childhood (OR 3.30; 95% CI, 1.95 to 5.59), testing for Helicobacter pylori (OR 12.17; 95% CI, 6.15 to 24.08), being an ex-smoker (OR 2.26; 95% CI, 1.44 to 3.54) and exposure to environmental tobacco smoke in adulthood (OR 3.29; 95% CI, 1.94 to 5.59).
