Selenium in forage crops and cancer mortality in U.S. counties.
作者： Larry C. Clark , Kenneth P. Cantor , W. H. Allaway
DOI: 10.1080/00039896.1991.9937427
关键词: Regression analysis 、 Demography 、 Cervix 、 Ecological study 、 Esophagus 、 Cancer 、 Rectum 、 Medicine 、 Epidemiology 、 Selenium
摘要: The potential protective effect of selenium status on the risk developing cancer has been examined in animal and epidemiologic studies. This ecological study investigated association between U.S. county forage site- sex-specific mortality rates (1950-1969) using weighted least squares regression. Consistent, significant (p less than .01) inverse associations were observed for cancers lung, rectum, bladder, esophagus, cervix a model limited to rural counties breast, corpus uteri all counties. No consistent positive models. remarkable degree consistency strengthens likelihood causal relationship low an increased mortality.
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