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Table 1 Description of study population

From: Validity and predictors of BMI derived from self-reported height and weight among 11- to 17-year-old German adolescents from the KiGGS study

  Boys (n = 1 792) Girls (n = 1 676) p 1 Total (n = 3 468)
  N % N %   N %
Age      0.435   
   11-13 802 44.8 728 43.4   1 530 44.1
   14-17 990 55.2 948 56.6   1 938 55.9
Weight status (measured)     0.381   
   Underweight 145 8.1 115 6.9   260 7.5
   Normal weight 1 329 74.2 1 264 75.4   2 593 74.8
   Overweight 318 17.7 297 17.7   615 17.7
Weight status (self-reported)    0.339   
   Underweight 179 10.0 159 9.5   338 9.7
   Normal weight 1 328 74.1 1 277 76.2   2 605 75.1
   Overweight 285 15.9 240 14.3   525 15.1
Body perception     0.000   
   Too thin 339 19.2 149 9.0   488 14.2
   Right weight 797 45.0 605 36.4   1 402 40.9
   Too fat 634 35.8 907 54.6   1 541 44.9
   Missing 22   15    37  
Symptoms of an eating disorder    0.000   
   Conspicuous 284 16.1 480 29.0   764 22.4
   Inconspicuous 1 476 83.9 1 176 71.0   2 652 77.6
   Missing 32   20    52  
Sexual maturation     0.000   
   Tanner 1 106 6.0 81 4.9   187 5.5
   Tanner 2-3 532 30.3 244 14.7   776 22.7
   Tanner 4-6 1 120 64.0 1 335 80.0   2 455 71.8
   Missing 34   16    50  
Socio-economic status     0.934   
   Low 473 27.3 440 26.8   913 27.1
   Moderate 844 48.8 801 48.8   1 645 48.8
   High 414 23.9 399 24.3   813 24.1
   Missing 61   36    97  
Migration background     0.206   
   Migrant 281 15.7 237 14.1   518 14.9
   Non-migrant 1 511 84.3 1 438 85.9   2 949 85.1
   Missing 0   1    1  
Parental overweight     0.495   
   Both 422 24.4 374 22.9   796 23.6
   One 790 45.6 770 47.1   1 560 46.3
   None 520 30.0 492 30.1   1 012 30.0
   Missing 60   40    100  
  1. 1 Pearson's Chi-square Test