Location: Obesity and Metabolism ResearchTitle: Identifying nutrients that are under-reported by an automated 24-hour dietary recall method in overweight and obese women after weight loss Author
|Widaman, A. - University Of California|
|Burnett, Dustin - University Of California|
|Miller, B. - University Of California|
|Witbract, Megan - University Of California|
Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 3/1/2015
Publication Date: 3/1/2015
Citation: Widaman, A.M., Burnett, D.J., Miller, B., Witbract, M., Keim, N.L., Laugero, K.D. 2015. Identifying nutrients that are under-reported by an automated 24-hour dietary recall method in overweight and obese women after weight loss. Meeting Abstract. 2015 Academy of Nutrition & Dietetics Annual Meeting , Nashville TN, October 3-6, 2015.
Technical Abstract: Underreporting of energy intake by 15-50% is a common problem in dietary assessment. Evidence suggests overweight/obese respondents are more likely to under-report than normal weight. This study compared Automated Self-Administered 24-hour recall (ASA24)-reported dietary intake to true intake in overweight/obese women following weight loss. Prior to this study, all participants lost 4%-10% of their initial body weight over a 9-week period and received one-on-one training in using ASA24. Participants were fed a controlled diet for an average of 16 days and completed an unannounced ASA24 recall of one of these days. Intake and plate waste was measured by trained research staff. Comparison of actual to reported intake was done using descriptive statistics, t-tests, and linear regression with SPSS software. Participants (n=46, age=37.3y±SD9.6, BMI=31.0kg/m²±SD3.5) recalled 82% of food/beverages actually consumed with 51% considered exact matches. Food groups most often excluded were fruits/vegetables (23%), grains (21%) and nuts/seeds (18%). With ASA24, mean energy was under-reported by 115 kcals compared to true intake (p=0.051). Significantly under-estimated nutrients included total carbohydrates (p=0.002), selenium (p=0.010), Vitamin C (p=0.022), and Vitamin B-12 (p=<0.001). Correlations between reported and actual nutrients ranged from moderate to strong (r=0.45-0.82). In a population of overweight/obese women post-weight loss, ASA24 captured the majority of foods/beverages eaten with under-reports of energy averaging 5%, considerably less than previous reports. Participants' ASA24 selection of foods that were not well-matched or totally excluded likely contributed to differences in carbohydrates and certain micronutrients. Further exploration into the etiology of under-reporting in overweight women using ASA24 is warranted. Learning objective: After the presentation, the learner will be able to describe the validity of nutrient data obtained from an automated, self-administered 24-hour recall in a group of overweight and obese women after weight loss.