Strength of the relationships between three self-reported dietary intake instruments and serum carotenoids: the observing energy and protein nutrition (open) study

Auteur(s) :
Midthune D., Thompson FE., George SM.
Date :
Jan, 2012
Source(s) :
Adresse :
Applied Research Program, Division of Cancer Control and Population Sciences, National Cancer Institute, 6130 Executive Blvd, EPN 4017A, Bethesda, MD 20892, USA.

Sommaire de l'article

OBJECTIVE: To assess the strength of the relationships between serum carotenoids and three self-reported dietary intake instruments often used to characterize carotenoid intake in studies of diet and disease.

DESIGN: Participants completed a Diet History Questionnaire (DHQ), two 24 h dietary recalls (24HR), a fruit and vegetable screener and a fasting blood draw. We derived dietary intake estimates of α-carotene, β-carotene, cryptoxanthin, lutein, zeaxanthin and lycopene from each diet instrument and calculated sex-specific multivariate correlations between dietary intake estimates and their corresponding serum values.

SETTING: Montgomery County, Maryland, USA.

SUBJECTS: Four hundred and seventy women and men aged 40-69 years in the National Cancer Institute’s Observing Protein and Energy Nutrition (OPEN) Study.

RESULTS: Serum carotenoids correlated more strongly with the DHQ (r = 0·34-0·54 for women; r = 0·38-0·56 for men) than with the average of two recalls (r = 0·26-0·47 for women; r = 0·26-0·40 for men) with the exception of zeaxanthin, for which the correlations using recalls were higher. With adjustment for within-person variation, correlations between serum carotenoids and recalls were greatly improved (r = 0·38-0·83 for women; r = 0·42-0·74 for men). In most cases, correlations between serum carotenoids and the fruit and vegetable screener resembled serum-DHQ correlations.

CONCLUSIONS: Evidence from the study provides support for the use of the DHQ, a fruit and vegetable screener and deattenuated recalls for estimating carotenoid status in studies without serum measures, and draws attention to the importance of adjusting for intra-individual variability when using recalls to estimate carotenoid values.

Source : Pubmed