Résumé :
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[BDSP. Notice produite par INIST-CNRS sFR0x8I9. Diffusion soumise à autorisation]. Few food frequency questionnaires (FFQs) have been developed specifically for use among African Americans, and reports of FFQ performance among African Americans or low-income groups assessed using biochemical indicators are scarce. The authors conducted a validation study within the Southern Community Cohort Study to evaluate FFQ-estimated intakes of alpha-carotene, bêta-carotene, bêta-cryptoxanthin, lutein/zeaxanthin, lycopene, folate, and alpha-tocopherol in relation to blood levels of these nutrients. Included were 255 nonsmoking participants (125 African Americans, 130 non-Hispanic whites) who provided a blood sample at the time of study enrollment and FFQ administration in 2002-2004. Levels of biochemical indicators of each micronutrient (alpha-tocopherol among women only) significantly increased with increasing FFQ-estimated intake (adjusted correlation coefficients : alpha-carotene, 0.35 ; bêta-carotene, 0.28 ; bêta-cryptoxanthin, 0.35 ; lutein/zeaxanthin, 0.28 ; lycopene, 0.15 ; folate, 0.26 ; alpha-tocopherol, 0.26 among women ; all P's
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