title: Dietary intake measured from a self-administered, online 24-hour recall system compared with 4-day diet records in an adult US population.
abstract: The objective of this study was to compare nutrient intake of two 24-hour recalls collected using the Automated Self-Administered 24-Hour Dietary Recall to a 4-day food record. A convenience sample of university-affiliated adults was chosen because of the diverse population at this university. Ninety-three participants completed the 4-day record and were then prompted to complete two 24-hour recalls within 2 weeks after. Pearson correlation coefficients were calculated for nutrient intake and Healthy Eating Index 2005 (HEI-2005), a summary measure of diet quality. Nutrients and HEI-2005 were also divided into quartiles and percent agreement and κ values were calculated. Results indicated that mean nutrient intakes were similar across the recall and record. Pearson correlations comparing the record and recall ranged from 0.16 to 0.78; with most correlations being between 0.4 and 0.6. For quartiles of dietary intake, percent agreement was moderately high (62.6% to 79.8%), with low to moderate κ values (κ=0.11 to 0.52). The 24-hour recall provided a good overall ranking of intake compared to a 4-day food record. Overall correlations and percent agreement were moderate across the nutrients and HEI-2005, suggesting that the 24-recalls may have been capturing different information than the food record in our population. Individual researchers will need to weigh the benefits of a more automated system, such as efficiency, against the potential loss of food item detail and potential need for larger sample sizes, for their particular study populations.
authors.affiliation: Department of Global and Community Health, George Mason University, 4400 University Dr, MS 5B7, Fairfax, VA 22030, USA. cfranken@gmu.edu
authors.forename: Cara L
authors.initials: CL
authors.lastname: Frankenfeld
authors.forename: Jill K
authors.initials: JK
authors.lastname: Poudrier
authors.forename: Nigel M
authors.initials: NM
authors.lastname: Waters
authors.forename: Patrick M
authors.initials: PM
authors.lastname: Gillevet
authors.forename: Yang
authors.initials: Y
authors.lastname: Xu
mesh_terms: D000293:Adolescent; D000328:Adult; D004032:Diet / Q000592:standards* / Q000706:statistics & numerical data*; D015930:Diet Records; D005260:Female; D006801:Humans; D008297:Male; D011939:Mental Recall; D008875:Middle Aged; D015596:Nutrition Assessment; D015203:Reproducibility of Results; D012650:Self Disclosure; D018709:Statistics, Nonparametric; D055815:Young Adult