Table 1.

Anthropometric data: entire group, girls versus boys

	Total	Girls	Boys	p value
N	94,586	48,930	45,656
Age, years	12.5 (10.6; 13.9)	12.46 (10.5; 13.9)	12.54 (10.8; 13.8)	0.00031*
Migration background, %	15.8	15.2	16.5	<0.001**
Ethnicity “white”, %	95.67	95.74	95.59	0.0041**
Ethnicity “black”	0.56	0.61	0.51
Ethnicity “South Asian”	0.13	0.10	0.16
Ethnicity “South Asian”	1.61	1.53	1.70
Ethnicity “others”	2.02	2.01	2.03
Weight-SDS	2.0 (1.6; 2.4)	1.97 (1.6; 2.4)	1.97 (1.6; 2.4)	0.14540*
Height-SDS	0.7 (0.0; 1.4)	0.63 –(0.06; 1.36)	0.71 (0.04; 1.42)	<0.001*
BMI, kg/m2	28.3 (25.8; 31.6)	28.3 (25.7; 31.8)	28.3 (25.9; 31.5)	0.27434*
BMI-SDS	1.99 (1.70; 2.30)	1.97 (1.68; 2.29)	2.01 (1.72; 2.31)	<0.001*
%BF	39.4 (36.4; 42.6)	40.9 (38.3; 43.9)	37.5 (34.7; 40.8)	<0.001*
Fat mass, kg	27.5 (22.2; 34.2)	28.5 (22.8; 35.3)	26.5 (21.8; 32.8)	<0.001*
Arterial hypertension, %	58.4	57.2	59.6	<0.001*
Dyslipidaemia, %	33.5	32.7	34.3	0.00009**
Impaired glucose tolerance, %	11.7	11.2	12.3	0.00052**

*p values with Bonferroni-Holm correction for repeated testing.

**χ² test. SDS, standard deviation score.