title: Physical activity levels from a meta-analysis of doubly labeled water studies for validating energy intake as measured by dietary assessment.
abstract: Studies using doubly labeled water have identified underreporting of food intake as a problem of dietary surveys. However, reported energy intakes may be evaluated by comparison with energy requirements expressed as multiples of the basal metabolic rate, and a formula for calculating the value below which reported intake cannot be either a valid measure of habitual intake or a true low intake obtained by chance is presented. The energy requirements of different age-sex groups needed for the comparison with energy intakes have been obtained from a meta-analysis of doubly labeled water data.
authors.affiliation: Dunn Clinical Nutrition Centre, Cambridge, UK.
authors.forename: A E
authors.initials: AE
authors.lastname: Black
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D002675:Child, Preschool; D004032:Diet; D002149:Energy Intake; D004734:Energy Metabolism; D005260:Female; D006801:Humans; D007223:Infant; D007553:Isotope Labeling; D008297:Male; D008433:Mathematics; D015201:Meta-Analysis as Topic; D008875:Middle Aged; D011897:Random Allocation; D014867:Water
chemical_list: D014867:Water