The Malmö food study : The relative validity of a modified diet history method and an extensive food frequency questionnaire for measuring food intake
Objective: To assess the relative validity of two diet assessment methods, an extensive quantitative food frequency questionnaire (method A) and a novel shorter quantitative food frequency questionnaire with a 14 day food record (method B). Design: A randomized prospective cohort study. Setting: General community. Subjects: 206 residents of the town of Malmö, aged between 50-69 years, 101 men and