title: Validation and calibration of self-reported weight and height from individuals in the city of São Paulo.
abstract: OBJECTIVE
  To evaluate the validity of self-reported weight and height measurements among residents of São Paulo, as well as the accuracy of these measurements for determining nutritional status, and to present calibration coefficients.
  
  
  METHODS
  A cross-sectional, population-based study was performed with a sample of 299 adolescents, adults and elderly of both genders, in São Paulo in 2008. Bland-Altman difference plot and intraclass correlation were used to determine agreement between measured and self-reported parameters. Sensitivity and specificity were assessed for overweight, and calibration coefficients were estimated for correction of weight, height and body mass index data.
  
  
  RESULTS
  The intraclass correlation was high between self-reported and measured parameters for weight (r > 0,94) and body mass index (BMI) (r > 0,85). The agreement between measured and self-reported weight, height and BMI was good. Sensibility was > 91% and specificity was > 83%.
  
  
  CONCLUSIONS
  Self-reported weight measurements can substitute measured parameters in this population, in both genders and in the age groups studied. Self-reported height measurements should be used with caution. Calibration coefficients can be used to adjust self-reported measurements.
authors.affiliation: Department of Nutrition, School of Public Health, Universidade de São Paulo, São Paulo, SP, Brazil.
authors.forename: Aline Martins de
authors.initials: AM
authors.lastname: Carvalho
authors.affiliation: Department of Nutrition, School of Public Health, Universidade de São Paulo, São Paulo, SP, Brazil.
authors.forename: Lívia Gonçalves
authors.initials: LG
authors.lastname: Piovezan
authors.affiliation: Department of Nutrition, School of Public Health, Universidade de São Paulo, São Paulo, SP, Brazil.
authors.forename: Soraya SantÂ Ana de Castro
authors.initials: SS
authors.lastname: Selem
authors.affiliation: Department of Nutrition, School of Public Health, Universidade de São Paulo, São Paulo, SP, Brazil.
authors.forename: Regina Mara
authors.initials: RM
authors.lastname: Fisberg
authors.affiliation: Department of Nutrition, School of Public Health, Universidade de São Paulo, São Paulo, SP, Brazil.
authors.forename: Dirce Maria Lobo
authors.initials: DM
authors.lastname: Marchioni
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001827:Body Height; D001835:Body Weight; D001938:Brazil; D002138:Calibration; D002648:Child; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D057566:Self Report; D014505:Urban Population; D055815:Young Adult