Physical activity, aerobic fitness and parental socio-economic position among adolescents: the German Health Interview and Examination Survey for Children and Adolescents 2003–2006 (KiGGS)

Table 1 Description of participants and means of the outcome indicators according to selected key variables, boys and girls 11–17 years

	Study sample		Leisure time activity	Media use	PWC170^a	Total energy expenditure^b
Characteristics	n	%	Mean hours/week	Mean hours/day	Mean watt/kg body weight	Mean MET/24 hours
Total	5251		6.3	5.9	2.1	44.2
Age (years)
11 - 13	2401	46	6.5	4.8	2.0	45.7
14 - 15	1522	29	6.4	6.7	2.1	43.4
16 - 17	1328	25	5.6	7.0	2.1	42.5
Sex
boys	2677	51	7.9	5.9	2.3	45.5
girls	2574	49	4.6	5.9	1.9	42.9
Region in Germany
Former East	1756	34	6.2	6.3	2.1	43.7
Former West	3495	66	6.3	5.7	2.1	44.5
Parental education
Primary	972	19	6.7	6.5	2.0	43.8
Secondary	2835	54	6.4	6.1	2.1	44.1
Tertiary	1444	28	5.7	5.1	2.1	44.8
Parental occupation
Low	1526	29	6.9	6.8	2.0	43.6
Middle	1708	33	6.1	5.7	2.1	44.4
High	1871	36	5.9	5.3	2.1	44.6
Missing	146	3	6.4	6.9	2.0	43.2
Household income
Low	1680	32	6.5	6.3	2.0	44.0
Middle	1452	26	6.3	5.9	2.1	44.3
High	1693	32	5.9	5.5	2.1	44.5
Missing	426	8	6.6	6.2	2.1	44.1
BMI-for-age (WHO z-scores)
Below -2 Z	83	2	5.4	5.4	2.3	44.2
-2 to -1 Z	478	9	6.5	5.3	2.2	45.1
-1 to +1 Z	3310	63	6.1	5.9	2.1	44.2
+1 to +2 Z	961	18	6.7	6.1	1.9	44.4
Above +2 Z	419	8	6.5	6.6	1.6	43.5
Physical wellbeing
Low	1902	36	5.7	6.3	2.0	43.3
Middle	1520	29	6.2	5.8	2.1	44.3
High	1689	32	7.1	5.5	2.1	45.3

^aPWC170, physical work capacity at a heart rate of 170 heart beats per minute. ^bEnergy expenditure assessed on the basis of self-reported activities within 24 h, expressed in metabolic equivalents (MET) kcal/kg, 1 MET = a person’s caloric consumption at complete rest.

ISSN: 1479-5868