BLACK, AE, PRENTICE, AM, GOLDBERG, GR, JEBB, SA, BINGHAM, SA, Livingstone, Barbara and COWARD, WA (1993) MEASUREMENTS OF TOTAL-ENERGY EXPENDITURE PROVIDE INSIGHTS INTO THE VALIDITY OF DIETARY MEASUREMENTS OF ENERGY-INTAKE. JOURNAL OF THE AMERICAN DIETETIC ASSOCIATION, 93 (5). pp. 572-579. [Journal article]
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The quantification of errors inherent in methods of measuring dietary intake has been handicapped by the absence of independent markers for testing their validity The doubly labeled water technique permits a precise measure of energy expenditure in free-living persons. Because energy expenditure must equal energy intake in populations in energy balance, this technique may be used to validate the assessment of energy intake. A series of studies demonstrated good agreement between mean energy intake and mean energy expenditure when food intake was recorded by observers or when it was self-reported by normal-weight, self-selected, highly motivated volunteer subjects using weighed records. However, in randomly recruited men and women, energy intake by weighed records was 82% and 81%, of energy expenditure, respectively, indicating underestimation of habitual intake. Men and women in the lowest third of reported intake recorded energy expenditure of only 69% and 61%, respectively. Reported intake of obese and previously obese women was only 73% and 64% of expenditure, whether measured by weighed record or by diet history, confirming suspicions that these subjects misrepresented their intake. Acceptable weighed records were obtained from 7- and 9-year-olds whereas 15- and 18-year-olds underestimated intake. Diet histories taken from the same children tended to overestimate intake. These studies suggest that, ideally, all dietary studies should include independent measures of validity.
|Item Type:||Journal article|
|Faculties and Schools:||Faculty of Life and Health Sciences|
Faculty of Life and Health Sciences > School of Biomedical Sciences
|Research Institutes and Groups:||Biomedical Sciences Research Institute > Northern Ireland Centre for Food and Health (NICHE)|
|Deposited By:||Dr Tracy McCaffrey|
|Deposited On:||13 Jan 2010 16:30|
|Last Modified:||13 Jan 2010 16:30|
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