Creating default codes and assigning nutrient values for non-specific dietary supplements

Carrie L. Blitz, Suzanne P. Murphy, Donna Lyn M T Au, Kim M M Yonemori, Janet A Foote, Laurence N. Kolonel

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Capturing dietary supplement intake is difficult when the participant provides insufficient detail. The purpose of this project was to assign default nutrient values to incompletely reported dietary supplements. From 1999 to 2001, all participants in the Hawaii-Los Angeles Multiethnic Cohort were sent a questionnaire requesting information on use of multivitamins or multivitamins with minerals. In Hawaii, 70,058 supplements were reported by 44,662 respondents. If the supplement reported could not be matched to a specific supplement on the market, one of 529 defaults was assigned. The defaults were designed to capture as much detail as possible about the reported supplements. Nutrient values were assigned to each default after data entry was completed. We determined all multivitamins and multivitamins with minerals that were used and the frequency of each. Using this information, each default was linked to appropriate supplement(s) and nutrient values were calculated using a weighted average, determined by the frequency of each linked supplement. When the supplement reported cannot be matched to a supplement on the market, the use of default nutrient values provides a better estimate of nutrient intake than assuming no supplement was consumed.

Original languageEnglish (US)
Pages (from-to)453-460
Number of pages8
JournalJournal of Food Composition and Analysis
Volume19
Issue number5
DOIs
StatePublished - Aug 2006
Externally publishedYes

Fingerprint

Dietary Supplements
dietary supplements
nutritive value
Food
Hawaii
Minerals
minerals
markets
nutrient intake
Los Angeles
questionnaires
Surveys and Questionnaires

Keywords

  • Default values
  • Dietary supplements
  • Multivitamin

ASJC Scopus subject areas

  • Food Science

Cite this

Creating default codes and assigning nutrient values for non-specific dietary supplements. / Blitz, Carrie L.; Murphy, Suzanne P.; Au, Donna Lyn M T; Yonemori, Kim M M; Foote, Janet A; Kolonel, Laurence N.

In: Journal of Food Composition and Analysis, Vol. 19, No. 5, 08.2006, p. 453-460.

Research output: Contribution to journalArticle

Blitz, Carrie L. ; Murphy, Suzanne P. ; Au, Donna Lyn M T ; Yonemori, Kim M M ; Foote, Janet A ; Kolonel, Laurence N. / Creating default codes and assigning nutrient values for non-specific dietary supplements. In: Journal of Food Composition and Analysis. 2006 ; Vol. 19, No. 5. pp. 453-460.
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