Abstract
Background
Accurately estimating portion sizes remains a challenge in dietary assessment. Digital
images used in online 24-hour dietary recalls may be conducive to accuracy.
Objective
The current analyses were conducted to examine the accuracy of portion size estimation
by women with low incomes who completed 24-hour dietary recalls using the online Automated
Self-Administered 24-hour Dietary Assessment Tool (ASA24) in the Food and Eating Assessment
Study II.
Design
True dietary intake was observed for 3 meals on 1 day through a controlled feeding
study conducted from May through July 2016. The following day, participants completed
an unannounced 24-hour dietary recall using ASA24, independently or with assistance
in a small-group setting.
Participants/setting
Participants included 302 women aged 18 to 82 years living in the Washington, DC,
area who met the income thresholds for the Supplemental Nutrition Assistance Program.
Main outcome measures
The accuracy of portion size estimation was assessed by comparing the weight truly
consumed (observed) and the weight reported for predetermined categories of foods
and beverages.
Statistical analyses performed
The differences between observed and reported portions were examined and linear regression
tested differences by recall condition. Analyses were conducted by condition and repeated
with stratification by racial/ethnic identity, education, and body mass index.
Results
On average across foods and beverages, reported portion sizes were 7.4 g (95% CI,
4.3-10.5) and 6.4 g (95% CI, 2.8-10.0) higher than observed portion sizes in the independent
and assisted conditions, respectively. Portion sizes were overestimated for small
pieces and shaped foods in both conditions, as well as for amorphous/soft foods in
the assisted condition and underestimated for single-unit foods in both conditions.
Misestimation was fairly consistent by participants’ race/ethnicity, education, and
body mass index, to varying magnitudes.
Conclusions
Women with low incomes overestimated the amounts of foods and beverages consumed across
several categories using online 24-hour dietary recalls with digital images to support
portion size estimation. Assistance with ASA24 had little impact on accuracy.
Keywords
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Biography
S. I. Kirkpatrick is an associate professor, School of Public Health Sciences, University of Waterloo, Waterloo, ON, Canada.
Biography
P. M. Guenther is a research professor, Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City.
Biography
C. Durward is an associate professor, Department of Nutrition, Dietetics and Food Sciences, Utah State University, Logan.
Biography
D. Douglass is a research nutritionist, Westat, Rockville, MD.
Biography
T. P. Zimmerman is a research nutritionist, Westat, Rockville, MD.
Biography
L. L. Kahle is a programmer, Information Management Services, Inc, Rockville, MD.
Biography
A. T. Atoloye is a postdoctoral research associate, Rudd Center for Food Policy and Obesity, University of Connecticut, Hartford.
Biography
M. L. Marcinow is a research associate, Institute for Better Health, Trillium Health Partners, Mississauga, ON, Canada.
Biography
M. R. Savoie-Roskos is an associate professor, Department of Nutrition, Dietetics and Food Sciences, Utah State University, Logan.
Biography
K. A. Herrick is a program director, Division of Cancer Control and Population Sciences, National Cancer Institute, Bethesda, MD.
Biography
K. W. Dodd is a mathematical statistician, Division of Cancer Prevention, National Cancer Institute, Bethesda, MD.
Article Info
Publication History
Published online: April 04, 2022
Accepted:
March 30,
2022
Received:
July 8,
2020
Footnotes
STATEMENT OF POTENTIAL CONFLICT OF INTEREST No potential conflict of interest was reported by the authors.
FUNDING/SUPPORT Data collection was funded by a grant from the USDA National Institute of Food and Agriculture (2015-09151). The current analyses were supported by the National Cancer Institute . At the time the initial analyses were conducted, S. I. Kirkpatrick was supported by a Canadian Cancer Society Research Institute (CCSRI) Capacity Development Award (Grant 702855) and M. Marcinow was supported by funding from Alberta’s Tomorrow Project and the aforementioned CCSRI award.
Identification
Copyright
© 2022 Published by Elsevier Inc on behalf of the Academy of Nutrition and Dietetics.
