Evaluation & Validation
ASA24 is based upon the USDA Automated Multiple-Pass Method (AMPM), which has
been validated and shown to accurately estimate mean total energy and protein
intakes compared to recovery biomarkers (Kipnis et al, 2003; Moshfegh et al,
2008).
The ASA24 development team conducted numerous small-scale cognitive and
usability tests on the Beta and ASA24-2011 (formerly referred to as Version 1) Respondent Web sites.
Preliminary examination of output from recalls completed using ASA24 suggests
acceptable face validity (i.e., calorie, nutrient, and food group estimates that
are consistent with data from the National Health and Nutrition Examination
Survey).
ASA24-2011
To formally evaluate the impact of the change in mode of administration
from the interviewer-administered AMPM 24-hour recall to a self-administered
web-based recall, two studies are being conducted using ASA24-2011:
- One large study of healthy individuals in a variety of geographic regions
is comparing the nutrient and food group estimates from respondents completing
ASA24 to those completing a standardized AMPM interviewer-administered
recall.
- In a second smaller study, investigators are unobtrusively documenting food
intakes of participants who are randomly assigned to one of two groups. One
group is completing a recall using ASA24 and the second group is completing a
standardized AMPM interviewer-administered recall. Analyses will assess
differences in the validity between the two types of recalls.
These studies are currently underway and results are expected in 2013.
In addition, ASA24 is being evaluated within the Multi-Cohort Eating and
Activity Study for Understanding Reporting Error (MEASURE), which is designed to
assess the structure of measurement error in self-report diet and physical
activity instruments in multiple large cohorts. Data collection for MEASURE,
which includes three cohorts (the Harvard Nurses' Health Study, the Harvard
Health Professionals Follow-Up Study, and the National Institutes of Health-AARP
Diet and Health Study), began in late 2010. The Nurses' Health study is using
the Beta version of ASA24; the other two cohorts are using ASA24-2011. Results
are expected in 2013.
ASA24-Kids-2012
Formative research was conducted in the early stages of the adaptation of ASA24 for children. However, ASA24-Kids-2012 has not yet been evaluated. Collaboration with researchers who are interested in evaluating ASA24 as part of their research is welcome. Please contact Amy Subar at subara@mail.nih.gov for further information.
ASA24™ is a trademark of DHHS.
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