First, the NCHS/WHO references for school-aged children and adolescents have a number of methodological and practical problems, which may be magnified in Indo-Asian populations.
In order to provide a smooth transition from the Polish 2012 preschool growth references curves beyond age of 6 years, data of the OLA study were merged with data of the OLAF study, which provided Polish 2010 growth references for school-aged children and adolescents [ 15].
In this paper, we present cross-sectional height, weight, and BMI references for school-aged children in Poland using data from a current sample of Polish children aged 6 to 19 years and compare the resultant, selected centiles with chosen growth references.
The results of this study may provide a useful reference for school nurses designing menstrual health programs for adolescents.
Age and gender specific BMI cut-points were used to classify participants as underweight, normal weight, overweight or obese using the 2007 WHO growth reference for school aged children (5 19 years old) [ 41].
*Based on the 2007 WHO growth reference for school-age children and adolescents [ 17].
#Prevalence estimates were based on the 2007 WHO recommended growth reference for school-age children and adolescents [ 17].
*Prevalence estimates were based on the IOTF recommended growth reference for school-age children and adolescents [ 19].
Height-for-age and BMI-for-age were converted to z-scores based on the 2007 WHO growth reference for school-aged children and adolescents [ 25].
In summary, we have extended weight-for-age beyond 10y using the same core data used to create the WHO reference for school-aged children and adolescents.
Onis M, Onyango AW, Borghi E, Siyam A, Nishida C, Siekmann J: Development of a WHO growth reference for school-aged children and adolescents.
