| Titre : | EPIC : European Prospective Investigation into Cancer and Nutrition. Validity studies on dietary assessment methods. Validation of dietary assessment methods in the UK arm of EPIC using weighed records, and 24-hour urinary nitrogen and potassium and serum vitamin C and carotenoids as biomarkers. (1997) |
| Auteurs : | S.A. BINGHAM ; A. CASSIDY ; N.E. DAY ; C. GILL ; T.J.A. KEY ; K.T. KHAW ; R. LUBIN ; Barry-M MARGETTS, éd. ; S. OAKES ; Pirjo PIETINEN, éd. ; Elio RIBOLI, coor. ; L. ROE ; S.A. RUNSWICK ; D.I. THURNHAM ; A. WELCH ; Clinical Gerontology Unit. F & G Block. Addenbrooke's Hospital. Cambridge. GBR ; Institute of Public Health. University of Cambridge. Forvie Site. Robinson Way. Cambridge. GBR ; Mrc Dunn Clinical Nutrition Centre. Hills Road. Cambridge. GBR |
| Type de document : | Article |
| Dans : | International journal of epidemiology (vol. 26, 1997) |
| Pagination : | S137-S151 |
| Langues: | Anglais |
| Mots-clés : | Consommation alimentaire ; Comportement alimentaire ; Questionnaire ; Méthodologie ; Etude comparée ; Epidémiologie ; Royaume Uni ; Europe ; Homme |
| Résumé : | [BDSP. Notice produite par INIST 7NkGDR0x. Diffusion soumise à autorisation]. Background. In the UK EPIC validation studies, the accuracy of several methods was assessed by comparison with 16-day weighed records and the biomarkers, 24-hour urine nitrogen (N) and potassium (K), plasma carotenoids and plasma vitamin C. Methods. Comparisons between methods were made on 156 women, studied over 1 year at 3-monthly intervals at home. On each of four occasions, volunteers completed 4 days of weighed records and provided two 24-hour urine collections and a fasting blood sample. Results. In comparison with the 16 days of weighed records, a food frequency questionnaire (FFQ) yielded higher values mainly due to greater reported consumption of milk and of vegetables. A 24-hour recall was as good as the FFQ in placing individuals in the distribution of habitual diet from weighed records. Results obtained from a 7-day estimated record were closest to those obtained from the weighed record. Correlations between 24-hour urine excretion and dietary N intake from weighed records were high (0.78-0.87) as were those with estimated food diaries (0.60-0.70). Correlations between urine N and the FFQ and 24-hour recall were lower (0.10 to 0.27), but improved by energy adjustment using residuals for N and K which are correlated with total energy intake. Comparisons between dietary estimates and urinary K and serum carotenoids and vitamin C showed broadly similar results. (...) |
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