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Validity of parent-reported weight and height of preschool children measured at home or estimated without home measurement : a validation study

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Abstract
Background: Parental reports are often used in large-scale surveys to assess children's body mass index (BMI). Therefore, it is important to know to what extent these parental reports are valid and whether it makes a difference if the parents measured their children's weight and height at home or whether they simply estimated these values. The aim of this study is to compare the validity of parent-reported height, weight and BMI values of preschool children (3-7 y-old), when measured at home or estimated by parents without actual measurement. Methods: The subjects were 297 Belgian preschool children (52.9% male). Participation rate was 73%. A questionnaire including questions about height and weight of the children was completed by the parents. Nurses measured height and weight following standardised procedures. International age-and sex-specific BMI cut-off values were employed to determine categories of weight status and obesity. Results: On the group level, no important differences in accuracy of reported height, weight and BMI were identified between parent-measured or estimated values. However, for all 3 parameters, the correlations between parental reports and nurse measurements were higher in the group of children whose body dimensions were measured by the parents. Sensitivity for underweight and overweight/obesity were respectively 73% and 47% when parents measured their child's height and weight, and 55% and 47% when parents estimated values without measurement. Specificity for underweight and overweight/obesity were respectively 82% and 97% when parents measured the children, and 75% and 93% with parent estimations. Conclusions: Diagnostic measures were more accurate when parents measured their child's weight and height at home than when those dimensions were based on parental judgements. When parent-reported data on an individual level is used, the accuracy could be improved by encouraging the parents to measure weight and height of their children at home.
Keywords
weight, height, BMI, IMPACT, PREVALENCE, OVERWEIGHT, OBESITY, INTERNATIONAL SURVEY, BODY-MASS, parent reports, children, validity

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Chicago
Huybrechts, Inge, John H Himes, Charlene Ottevaere, Tineke De Vriendt, Willem De Keyzer, Bianca Cox, Inge Van Trimpont, Dirk De Bacquer, and Stefaan De Henauw. 2011. “Validity of Parent-reported Weight and Height of Preschool Children Measured at Home or Estimated Without Home Measurement : a Validation Study.” Bmc Pediatrics 11.
APA
Huybrechts, I., Himes, J. H., Ottevaere, C., De Vriendt, T., De Keyzer, W., Cox, B., Van Trimpont, I., et al. (2011). Validity of parent-reported weight and height of preschool children measured at home or estimated without home measurement : a validation study. BMC PEDIATRICS, 11.
Vancouver
1.
Huybrechts I, Himes JH, Ottevaere C, De Vriendt T, De Keyzer W, Cox B, et al. Validity of parent-reported weight and height of preschool children measured at home or estimated without home measurement : a validation study. BMC PEDIATRICS. 2011;11.
MLA
Huybrechts, Inge, John H Himes, Charlene Ottevaere, et al. “Validity of Parent-reported Weight and Height of Preschool Children Measured at Home or Estimated Without Home Measurement : a Validation Study.” BMC PEDIATRICS 11 (2011): n. pag. Print.
@article{1906505,
  abstract     = {Background: Parental reports are often used in large-scale surveys to assess children's body mass index (BMI). Therefore, it is important to know to what extent these parental reports are valid and whether it makes a difference if the parents measured their children's weight and height at home or whether they simply estimated these values. The aim of this study is to compare the validity of parent-reported height, weight and BMI values of preschool children (3-7 y-old), when measured at home or estimated by parents without actual measurement. 
Methods: The subjects were 297 Belgian preschool children (52.9\% male). Participation rate was 73\%. A questionnaire including questions about height and weight of the children was completed by the parents. Nurses measured height and weight following standardised procedures. International age-and sex-specific BMI cut-off values were employed to determine categories of weight status and obesity. 
Results: On the group level, no important differences in accuracy of reported height, weight and BMI were identified between parent-measured or estimated values. However, for all 3 parameters, the correlations between parental reports and nurse measurements were higher in the group of children whose body dimensions were measured by the parents. Sensitivity for underweight and overweight/obesity were respectively 73\% and 47\% when parents measured their child's height and weight, and 55\% and 47\% when parents estimated values without measurement. Specificity for underweight and overweight/obesity were respectively 82\% and 97\% when parents measured the children, and 75\% and 93\% with parent estimations. 
Conclusions: Diagnostic measures were more accurate when parents measured their child's weight and height at home than when those dimensions were based on parental judgements. When parent-reported data on an individual level is used, the accuracy could be improved by encouraging the parents to measure weight and height of their children at home.},
  articleno    = {63},
  author       = {Huybrechts, Inge and Himes, John H and Ottevaere, Charlene and De Vriendt, Tineke and De Keyzer, Willem and Cox, Bianca and Van Trimpont, Inge and De Bacquer, Dirk and De Henauw, Stefaan},
  issn         = {1471-2431},
  journal      = {BMC PEDIATRICS},
  keyword      = {weight,height,BMI,IMPACT,PREVALENCE,OVERWEIGHT,OBESITY,INTERNATIONAL SURVEY,BODY-MASS,parent reports,children,validity},
  language     = {eng},
  pages        = {8},
  title        = {Validity of parent-reported weight and height of preschool children measured at home or estimated without home measurement : a validation study},
  url          = {http://dx.doi.org/10.1186/1471-2431-11-63},
  volume       = {11},
  year         = {2011},
}

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