title: Nutritional and pubertal status influences accuracy of self-reported weight and height in adolescents: the HELENA Study.
abstract: OBJECTIVE
  The aim of this study was to assess factors that have an effect on the accuracy of self-reported weight and height in adolescents.
  
  
  METHODS
  Weight and height of 3,865 European adolescents aged 12.5 to 17.5 years were self-reported via specific questionnaire. Then real weight and height were measured using accurate equipment and standardized protocols. Differences (D) between self-reported and measured weight and height were calculated, and factors that could have influenced the accuracy of self-reported weight and height were assessed. Data were analyzed using ANOVA, Student's t test and multivariate regression.
  
  
  RESULTS
  Adolescents underestimated their weight (D = -0.81 kg; n = 2,968) and overestimated their height (D = +0.74 cm; n = 3,308). Obese girls underestimated their weight (D = -4.70 kg) and overestimated their height (D = +0.22 cm) to a greater extent (p < 0.05) than obese boys (D = -3.13 kg and +0.14 cm for weight and height, respectively). Underestimation of weight (D = -1.25 kg) and overestimation of height (D = +0.15 cm) were only significant for girls who had finished puberty (Tanner stage 5). Socioeconomic status, nutritional knowledge, physical fitness, physical activity level, food choice and preference, and healthy eating behaviour had no significant influence on the accuracy of self-reported weight and height.
  
  
  CONCLUSIONS
  Our data confirms that self-reports of weight and height made by adolescents are inaccurate and demonstrate that inaccuracy is strongly influenced by nutritional status, pubertal status and gender.
authors.affiliation: U955 INSERM, IFR114, Faculty of Medicine, Université Lille Nord de France, Lille, France. laurent.beghin@chru-lille.fr
authors.forename: Laurent
authors.initials: L
authors.lastname: Béghin
authors.forename: Inge
authors.initials: I
authors.lastname: Huybrechts
authors.forename: Franscico B
authors.initials: FB
authors.lastname: Ortega
authors.forename: Stéphanie
authors.initials: S
authors.lastname: Coopman
authors.forename: Yannis
authors.initials: Y
authors.lastname: Manios
authors.forename: Trudy M A
authors.initials: TM
authors.lastname: Wijnhoven
authors.forename: Alain
authors.initials: A
authors.lastname: Duhamel
authors.forename: Donatella
authors.initials: D
authors.lastname: Ciarapica
authors.forename: Chantal C
authors.initials: CC
authors.lastname: Gilbert
authors.forename: Anthony
authors.initials: A
authors.lastname: Kafatos
authors.forename: Kurt
authors.initials: K
authors.lastname: Widhalm
authors.forename: Denes
authors.initials: D
authors.lastname: Molnar
authors.forename: Luis A
authors.initials: LA
authors.lastname: Moreno
authors.forename: Frédéric
authors.initials: F
authors.lastname: Gottrand
mesh_terms: D050154:Adiposity; D000293:Adolescent; D041923:Adolescent Development; D001827:Body Height; D001828:Body Image; D015992:Body Mass Index; D001835:Body Weight; D005060:Europe / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D009752:Nutritional Status; D009765:Obesity / Q000453:epidemiology*; D050177:Overweight / Q000453:epidemiology*; D011627:Puberty; D057566:Self Report; D012727:Sex Characteristics