Overall characteristics of the 895 children

CharacteristicsBoys (n = 571)Girls (n = 324)Total (n = 895)P-value
Age (years)12.1 ± 2.812.6 ± 2.812.3 ± 2.8P = 0.012a*
Age group (%)P = 0.002b*
  6–11 years48.037.344.1
  12–18 years52.062.755.9
BMI (%)P = 0.096b
  Overweight 90–97%17.513.316.0
  Obese > 97%82.586.784.0
AN (%)c55.754.655.3P = 0.943b

a Student’s t-test; b chi-square test; c AN status was available in 884 children (98.8%); * statistically significant with P < 0.05