Appendix to Methodology: Citation Relevancy Criteria

To pass the initial screen for ordering the full text article, the title and/or abstract met the following criteria:

1. Was published in 1982 or later;
2. Reviewed primary studies, or was a primary study using an instrument to assess food, supplement, and/or food born contaminant intake;
3. Contained (or at least presented an adequate impression that the full article might provide) discussion of assessment in non-institutionalized pregnant or lactating women, or children ages 0-18 years of age;
4. Contained (or at least presented an adequate impression that the full article might provide) discussion of assessment of college student populations that include 18 year old students;
5. Included a target population relevant to the characteristics of the proposed NCS cohort (and therefore included studies performed on European populations but excluded studies in most third world populations);
6. Did not target populations with eating disorders or specific disease conditions, such as cerebral palsy, diabetes, kidney disease, or developmental delays;
7. If the citation was a supplement-intervention study, it included an instrument to measure baseline supplement usage or included a biochemical marker validating supplement usage.
8. If the citation was an epidemiological study that included 16 to 18 year old participants as adults, it reported and analyzed data on adolescents separately;
9. If the citation was an analysis of published data from CSFII or NHANES, the abstract discussed dietary assessment methodology or dietary data collection issues; and
10. If the citation was a review article, it discussed dietary assessment methodology that may have relevance to the literature review's target population.