Study
IDATA
(Learn more about this study)
Project ID
IDATA-83
Initial CDAS Request Approval
Oct 18, 2024
Title
Impact of dietary assessment methods on reports of dietary supplement product use and nutrient intakes among adults in the Interactive Diet and Activity Tracking in AARP (IDATA) study
Summary
Accurately measuring all dietary exposures is critical to understanding how diet modulates health. However, measuring intakes of foods and beverages has been a pervasive challenge, and even less is known about the best approaches for measuring dietary supplements (DS). Reliable dietary assessment instruments for measuring nutrient intakes from dietary supplements (DS) are critical for nutrition research and monitoring, as DS use is pervasive in the U.S., and DS products contribute substantially towards intakes for certain micronutrients. Existing DS assessment tools vary in their ability to assess dietary intake accurately and reliably, and much remains unknown about how these tools perform when measuring DS intake. The longitudinal Interactive Diet and Activity Tracking in AARP (IDATA) cohort study of middle-aged and older adults in the U.S. was designed to evaluate the comparability of various dietary assessment tools (e.g., the 24-hr dietary recall (24HR) and Diet History Questionnaire (DHQ) II) and recovery biomarkers for dietary intakes from foods and beverages, however it is also inclusive of DS data. In turn, IDATA provides a unique opportunity to compare DS methods of assessment with repeat collections of DS data over the course of a year. Accordingly, in the present proposal, we intend to compare DS data on usage, frequency, and amounts taken reported on the Automated Self-Administered 24HR (ASA24) and the Diet History Questionnaire (DHQ) II methods in order to determine the most comprehensive approach for estimating the prevalence of use of and nutrient amounts from DS among U.S. older adults.
Aims
1). Evaluate participant-level agreement and differences in population-level prevalence of several micronutrient-containing and non-micronutrient-containing DS product types on the ASA24 and the DHQ II.
2). Estimate overall and specific product level analyses assessing the prevalence of use of DS products containing calcium and vitamin D – two nutrients that are most commonly consumed in the form of DS, among IDATA supplement users, by DS assessment method.
3). Approximate and compare mean usual intakes and mean consumption day amounts of calcium and vitamin D from foods/beverages and DS reported on the ASA24 and DHQII methods among IDATA adult supplement users, by source of intake and sex.
Collaborators
a. Alexandra E. Cowan-Pyle, PhD. Institute for Advancing Health Through Agriculture, Texas A&M AgriLife Research, Texas A&M University System.
b. Diane C. Mitchell, MS, RD. Institute for Advancing Health Through Agriculture, Texas A&M AgriLife Research, Texas A&M University System.
c. Janet A. Tooze, PhD, MPH. Wake Forest School of Medicine, Wake Forest University.
d. Terry Hartman, PhD, RD. Emory, Rollins School of Public Health.
e. Kevin Dodd, PhD. NIH/NCI
f. Jaime Gahche, PhD. NIH/ODS
