American Journal of Epidemiology Vol. 150, No. 3: 290-300
Copyright © 1999 by The Johns Hopkins University School of Hygiene and Public Health
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-Tecopherol Status in the United States Population: Findings from The Third National Health and Nutrition Examination Survey
1Division of Nutrition, National Centre for Chronic Disease Prevention and Health Promotion, Centres for Diseases Control and Prevention Atlanta, GA
2Division of Laboratory Sciences, National Center for Environmental Health, Centres for Diseases Control and Prevention Atlanta, GA
Reprint requests to Dr. Earl S. Ford, Division of Nutrition, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, 4770 Buford Highway, MS K26, Atlanta, GA 30341.
Despite the role vitamin E may have in protecting against various chronic conditions, little is known about vitamin E status in the US population. Using data from the Third National Health and Nutrition Examination Survey (1988–1994), the authors examined the distribution and correlates of serum 
-tocopherol among 16, 295 US adults aged 18 or more years. The mean concentration of -tocopherol was 26.8 jimol/liter (geometric mean, 25.0 nmol/liter). The 25th, 50th, and 75th percentiles were 19.6, 24.1, and 30.4 p/nol/liter, respectively. The mean a-tocopherol/cholesterol ratio was 5.1 (geometric mean, 4.9); the 25th, 50th, and 75th percentiles were 4.1, 4.7, and 5.5 (10–3), respectively. About 27% of the US population had a low -tocopherol concentration (<20 µmol/liter). After age standardization, 29% of the men, 28% of the women, 26% of the Whites (men, 27%, and women, 26%), 41% of the African Americans (men, 42%, and women, 40%), 28% of the Mexican Americans (men, 29%, and women, 27%), and 32% of the other participants (men, 36%, and women, 29%) had this low concentration. For all participants, age, educational attainment, serum cholesterol, and several serum vitamins and carotenoids were directly related to and high density lipoprotein cholesterol was inversely related to serum -tocopherol concentration in multiple linear regression analysis. Men had a higher concentration than did women, and African Americans had the lowest concentration of any racial or ethnic group. These results show that important proportions of US adults have a low serum -tocopherol concentration, which may increase their risk for chronic diseases in which low dietary intake or blood concentration of -tocopherol have been implicated. Am J Epidemiol 1999; 150: 290-300.
education; ethnic groups; health surveys; tocopherol
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