title: Critical evaluation of energy intake data using fundamental principles of energy physiology: 1. Derivation of cut-off limits to identify under-recording.
abstract: This paper uses fundamental principles of energy physiology to define minimum cut-off limits for energy intake below which a person of a given sex, age and body weight could not live a normal life-style. These have been derived from whole-body calorimeter and doubly-labelled water measurements in a wide range of healthy adults after due statistical allowance for intra- and interindividual variance. The tabulated cut-off limits, which depend on sample size and duration of measurements, identify minimum plausible levels of energy expenditure expressed as a multiple of basal metabolic rate (BMR). CUT-OFF 1 tests whether reported energy intake measurements can be representative of long-term habitual intake. It is set at 1.35 x BMR for cases where BMR has been measured rather than predicted. CUT-OFF 2 tests whether reported energy intakes are a plausible measure of the food consumed during the actual measurement period, and is always more liberal than CUT-OFF 1 since it has to allow for the known measurement imprecision arising from the high level of day-to-day variability in food intake. The cut-off limits can be used to evaluate energy intake data. Results falling below these limits must be recognized as being incompatible with long-term maintenance of energy balance and therefore with long-term survival.
authors.affiliation: Dunn Clinical Nutrition Centre, Cambridge, UK.
authors.forename: G R
authors.initials: GR
authors.lastname: Goldberg
authors.forename: A E
authors.initials: AE
authors.lastname: Black
authors.forename: S A
authors.initials: SA
authors.lastname: Jebb
authors.forename: T J
authors.initials: TJ
authors.lastname: Cole
authors.forename: P R
authors.initials: PR
authors.lastname: Murgatroyd
authors.forename: W A
authors.initials: WA
authors.lastname: Coward
authors.forename: A M
authors.initials: AM
authors.lastname: Prentice
mesh_terms: D000328:Adult; D001315:Australia; D002151:Calorimetry / Q000379:methods*; D002940:Circadian Rhythm / Q000502:physiology; D004034:Diet Surveys; D002149:Energy Intake / Q000502:physiology*; D004734:Energy Metabolism / Q000502:physiology*; D005060:Europe; D005247:Feeding Behavior / Q000502:physiology; D005260:Female; D006801:Humans; D008019:Life Style; D008297:Male; D009656:North America; D009751:Nutritional Requirements; D012015:Reference Standards