Gastric Cancer in Colombia. II. Case-Control Epidemiologic Study of Precursor Lesions2

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Abstract
Endoscopic surveys in the Department of Nariño (Colombia) showed that natives of areas of very high risks for stomach cancer have a higher prevalence of atrophic gastritis and intestinal metaplasia than do persons born in other parts of Nariño. In these surveys, diets were compared between individuals with and without evidence of these suspect precursor lesions of stomach cancer and between individuals born in the areas designated as high and low risk for stomach cancer. The composite evidence from the comparisons indicated lettuce to be negatively associated with stomach cancer and raised the possibility of a positive association for corn. The relationship of these findings to other epidemiologic evidence and the implications for applying the epidemiology of stomach cancer to the epidemiology of precursor lesions were examined.

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