Poster Topical Area: Nutritional Epidemiology
Location: Hall D
Poster Board Number: 743
Objective: The Automated Self-Administered 24-Hour Dietary Assessment Tool (ASA24) has been shown to perform well in capturing true intake among adults, but evidence to inform its use with low-income populations is lacking. This study was conducted to evaluate the accuracy of intake reported using ASA24 among women with low incomes.
Methods: True intake for three meals provided on one day was documented for 302 women, aged 18 years and older and with incomes below the thresholds for the Supplemental Nutrition Assistance Program. On the following day, women were randomized to complete unannounced recalls using ASA24-2016, either independently (n= 148) or with assistance from a trained paraprofessional in a small group setting (n= 154). True and reported consumption were compared and regression analyses applied to examine differences in agreement by condition for foods and beverages (matches, exclusions, and intrusions); energy, nutrient and food group intakes; and portion sizes.
Results: Participants who completed ASA24 independently versus with assistance reported 71.9% and 73.5% (p=0.26) of items truly consumed, respectively. For both conditions, exclusions (consumed but not reported) were highest for lunch (at which participants consumed about twice the number of distinct foods/beverages on average compared to breakfast and dinner). Commonly excluded foods were additions to main dishes (e.g., tomatoes in salad). The average number of intrusions (reported but not consumed) was 2.4 and 2.5 (p=0.57) for the independent and assisted conditions, respectively. The gaps between true intake and intake based upon reported consumption were significantly different between conditions for iron and folate. Within conditions, gaps were significant for protein, vitamin D, and meat (both conditions); vitamin A, iron, and magnesium (independent condition); and folate, calcium, and vegetables (assisted condition). For foods and beverages for which matches were reported, no difference in the gap between true and reported portion sizes was observed (p=0.11).
Conclusions: ASA24 performed relatively well in capturing intake; however, accuracy was somewhat lower than that previously observed among a higher income sample of adults. The provision of assistance did not significantly impact accuracy.
University of Waterloo
Waterloo, Ontario, Canada