title: Comparison of self-reported, measured, metabolizable energy intake with total energy expenditure in overweight teens.
abstract: BACKGROUND
  The accuracy of dietary energy assessment tools is critical to understanding the role of diet in the increasing rate of obesity.
  
  
  OBJECTIVE
  The purposes of our study in overweight adolescent boys and girls were 1) to assess the energy reporting bias of diet records against the referent of total energy expenditure (TEE) and 2) to compare the methods of determining energy needs by using measured metabolizable energy intake (MEI) and TEE.
  
  
  METHODS
  Twenty girls [12-15 y, body mass index (in kg/m2) = 33.0 +/- 5] and 14 boys (12-14 y, body mass index = 27.4 +/- 4) participated in 2- to 3-wk metabolic balance studies. TEE was measured by using doubly labeled water (TEE(DLW)), and MEI was measured by bomb calorimetry of composite daily diet, urine, and fecal collections. Food records were collected before each study.
  
  
  RESULTS
  Food records underreported TEE(DLW) by 35 +/- 20%. Underreporting of energy intake was correlated with all macronutrient intake concentrations (g or kcal) (P < 0.0001). A multiple regression model showed that 86.4% of the variance in underreporting error was explained by dietary fat (g), BMI, and sex. The intrasubject CV was 3.9% for TEE(DLW) and 9.9% for MEI. MEI for weight stability (MEI(wtstb)) averaged 99 +/- 11% of TEE.
  
  
  CONCLUSIONS
  The increased underreporting of dietary intake with increasing body weight in teens may explain in part previous reports noting that there has been an increased incidence of obesity, although energy intakes have not appeared to increase. MEI(wtstb) and TEE(DLW) gave similar estimates of energy needs. This trial was registered at clinicaltrials.gov as NCT 00592137.
authors.affiliation: Department of Foods and Nutrition and Statistics, Purdue University, West Lafayette, IN 47907-2059, USA.
authors.forename: Rajni
authors.initials: R
authors.lastname: Singh
authors.forename: Berdine R
authors.initials: BR
authors.lastname: Martin
authors.forename: Yvonne
authors.initials: Y
authors.lastname: Hickey
authors.forename: Dorothy
authors.initials: D
authors.lastname: Teegarden
authors.forename: Wayne W
authors.initials: WW
authors.lastname: Campbell
authors.forename: Bruce A
authors.initials: BA
authors.lastname: Craig
authors.forename: Dale A
authors.initials: DA
authors.lastname: Schoeller
authors.forename: Deborah Anne
authors.initials: DA
authors.lastname: Kerr
authors.forename: Connie M
authors.initials: CM
authors.lastname: Weaver
mesh_terms: D000293:Adolescent; D015992:Body Mass Index; D002648:Child; D004032:Diet; D015930:Diet Records; D002149:Energy Intake; D004734:Energy Metabolism; D005260:Female; D006801:Humans; D008297:Male; D009765:Obesity / Q000378:metabolism; D050177:Overweight / Q000378:metabolism*; D012650:Self Disclosure