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Objective: To investigate the correlation between dietary factors and risk of cancer mortality in the crocidolite-contaminated area of Dayao County, Chuxiong, Yunan Province, China.Methods: Data on 1,249 residents in Dayao were collected in a retrospective cohort study between 1984 and 2011.Cox regression model was used to estimate hazard ratio (HR) and 95% confidence interval (CI).