Risk Factors for Stomach Cancer in Brazil (II): a Case-control Study among Japanese Brazilians in Sao Paulo

Abstract

Background: Although stomach cancer is the most frequent cancer among Japanese Brazilians, the risk factor of this cancer has not been investigated among them. Methods: A case-control study was conducted among Japanese residents in the city of So Paulo. Ninety-six consecutive cases of histologically confirmed stomach cancer were matched to 192 controls admitted for non-neoplastic diseases or healthy volunteer (n = 80) by age ( 5 years) and gender. The socio-demographic characteristics, personal and family medical history, lifetime history of tobacco use and dietary habits were probed using a structured questionnaire.