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Table 3 BMI classification as a function of subjective BMI category among 11- to 15-year-old adolescents in Germany, stratified by gender in KiGGS

From: Applying a correction procedure to the prevalence estimates of overweight and obesity in the German part of the HBSC study

aij* KiGGS BMIsubKiGGSϵ
All Boys Girls
I1 I2 I3 I4 I5 I1 I2 I3 I4 I5 I1 I2 I3 I4 I5
BMIKiGGS ϵ                
I 1 44.0% 8.6% 0.2%   0.5% 34.3% 12.3% 0.2%   0.9% 60.9% 5.0% 0.1%   
I 2 26.8% 36.5% 2.9%    26.3% 34.5% 3.4%    27.7% 38.6% 2.5%   
I 3 27.2% 54.8% 91.2% 15.2% 9.0% 36.3% 53.2% 90.6% 19.4% 11.6% 11.3% 56.5% 91.8% 9.7% 6.4%
I 4 2.0%   5.2% 60.5% 12.2% 3.2%   5.5% 54.0% 15.4%    4.9% 69.2% 9.0%
I 5    0.5% 24.3% 78.3%    0.3% 26.6% 72.1%    0.7% 21.1% 84.6%
  1. * a ij KiGGS = P BMI I i BM I sub I j
  2. BMIKiGGS: Body mass index.
  3. BMIsubKiGGS: Body mass index calculated from self-reported weight and height.
  4. I1 … I5: i-th category for BMI and j-th category for BMIsub (i.e., 1 = extremely underweight, 2 = underweight, 3 = normal weight, 4 = overweight, 5 = obese).