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, ASA24-2011, and ASA24-2014 Respondent Web sites. Preliminary examination of output from recalls completed using ASA24 suggested acceptable face validity (i.e., calorie, nutrient, and food group estimates that are consistent with data from the National Health and Nutrition Examination Survey). Data from recent validation and evaluation studies, not yet published, indicate very close agreement between ASA24 and standardized interviewer-administered 24-hour recalls.
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 were conducted using ASA24-2011:
- One large study of healthy individuals in a variety of geographic regions compared 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 unobtrusively documented food intakes of participants randomly assigned to one of two groups. One group completed a recall using ASA24 and the second group completed a standardized AMPM interviewer-administered recall. Analyses are assessing differences in the validity between the two types of recalls.
Data from these studies are being analyzed; publications are expected in 2014.
In addition, ASA24-2011 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 sub-studies in 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 used the Beta version of ASA24; the other two cohorts used ASA24-2011. Data collection has finished for all three studies, and results are expected in late 2014 or early 2015.
Because the methods by which data are collected in ASA24-2014 and ASA24-2011 are nearly identical, no formal evaluation or validation efforts are planned by NCI for ASA24-2014. Changes between ASA24-2011 and ASA24-2014 were intended to improve the usability of the search and editing functions in addition to adding some new features. NCI has no reason to believe that the validation findings from the studies of ASA24-2011 will be any different for ASA24-2014. Collaboration with researchers who are interested in evaluating ASA24-2014 as part of their research is welcome. Please contact Amy Subar at email@example.com for further information.
Formative research was conducted in the early stages of the adaptation of ASA24 for children. However, ASA24-Kids-2014 and ASA24-Kids-2012 have not yet been formally evaluated. Collaboration with researchers who are interested in evaluating ASA24-Kids-2014 as part of their research is welcome. Please contact Amy Subar at firstname.lastname@example.org for further information.
ASA24™ is a trademark of HHS.
Last Modified: 11 Apr 2014