Association Between dietary iron Levels and all-cause and cancer-cause mortality: a Prospective Cohort Study
crossref(2024)
摘要
Abstract Although there are many studies concentrate on the connection between dietary iron and tumors. Few studies elucidated the association between total dietary iron and all-cause or cancer-cause mortality. Conclusions about how total dietary iron influences all-cause/cancer-cause mortality were paradoxical. Our study collected dietary iron and survival data from National Health and Nutrition Examination Survey (NHANES) 1999-2019. Multivariate Cox proportional risk models and subgroup analysis were used to assess the relationship between dietary iron and all/cancer-cause death. Restricted Cubic Samples (RCS) were used to fit the non-linear relationship between them. Dietary iron was a protective factor against all-cause mortality ( p for trend = 0.004), as well as cancer-cause mortality( p for trend = 0.028). Dietary iron content had a nonlinear relationship with and all-cause mortality (p for overall < 0.001; p for non-linearity < 0.001) with an "L" curve, so as to the cancer-related death (p for overall=0.002,p for non-linearity= 0.046). The nonlinear association of dietary iron and cancer-cause mortality differed from all/cancer-cause mortality.Our study found that dietary iron was a protective factor for death of all-cause and cancer in population and they had an "L" shaped nonlinear curves. All-cause/cancer mortality was attenuated by dietary iron in people who were aged <=65 years, males, Non-Hispanic White and Non-Hispanic Black, as well as people without hypertension or diabetes mellitus(DM).
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