Examination of the five comparable component scores of the diet quality indexes HEI-2005 and RC-DQI using a nationally representative sample of 2-18 year old children: NHANES 2003-2006

Sibylle Kranz, George P McCabe

Research output: Contribution to journalArticle (Academic Journal)

11 Citations (Scopus)

Abstract

Obesity has been associated with low diet quality and the suboptimal intake of food groups and nutrients. Two composite diet quality measurement tools are appropriate for Americans 2-18 years old: the Healthy Eating Index (HEI) 2005 and the Revised Children's Diet Quality Index (RC-DQI). The five components included in both indexes are fruits, vegetables, total grains, whole grains, and milk/dairy. Component scores ranged from 0 to 5 or 0 to 10 points with lower scores indicating suboptimal intake. To allow direct comparisons, one component was rescaled by dividing it by 2; then, all components ranged from 0 to 5 points. The aim of this study was to directly compare the scoring results of these five components using dietary data from a nationally representative sample of children (NHANES 2003-2006, N = 5,936). Correlation coefficients within and between indexes showed less internal consistency in the HEI; age- and ethnic-group stratified analyses indicated higher sensitivity of the RC-DQI. HEI scoring was likely to dichotomize the population into two groups (those with 0 and those with 5 points), while RC-DQI scores resulted in a larger distribution of scores. The scoring scheme of diet quality indexes for children results in great variation of the outcomes, and researchers must be aware of those effects.

Original languageEnglish
Pages (from-to)376314
JournalJournal of Obesity
Volume2013
DOIs
Publication statusPublished - 2013

Keywords

  • Adolescent
  • Cereals
  • Child
  • Child, Preschool
  • Dairy Products
  • Diet
  • Eating
  • Energy Intake
  • Female
  • Fruit
  • Health Food
  • Humans
  • Male
  • Nutrition Assessment
  • Nutrition Surveys
  • Socioeconomic Factors
  • United States
  • Vegetables

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