Methods

Reproducibility and intermethod reliability of a calcium food frequency questionnaire for use in Hispanic, non-Hispanic Black, and non-Hispanic White youth

BACKGROUND: A dietary assessment instrument designed for use in a nationally representative pediatric population was required to examine associations between calcium intake and bone mineral accrual in a large, multicenter study. OBJECTIVE: To …

Within- and between-individual variation in nutrient intake in children and adolescents

BACKGROUND: Little is known regarding the number of 24-hour recalls required to rank-order children and adolescents on usual intake for diet-disease studies. OBJECTIVE: To determine the within- to between-individual variance ratios and number of …