Assessment of Dietary Intake
Dietary intake was assessed using a 1-day 24-hour dietary recall collected by research staff using Nutrition Data System for Research (NDS-R) on Tuesday— Friday to ensure that only weekday eating patterns were recorded. Dietary recalls were utilized to obtain a record of the type and number of foods and beverages consumed by participants during a complete 24-hour period (from midnight to midnight) for the day preceding the interview. Dietary interviewers trained by the Nutrition Coordinating Center (NCC) used NDS-R dietary data collection computer software to obtain 24-hour dietary recalls from participants via face-to-face interviews utilizing a standardized multiple-pass approach in which NDS-R displays computer prompts to assist interviewers in following a consistent, systematic approach. Interviews were conducted
during the school day and took 30-45 minutes to complete. Participants were shown standardized
food portion models to assist in estimating amounts of food consumed.