Table 1.

Sociodemographic and anthropometric data, physical activity variables for 2-year and 6-year follow-up

	2-year follow-up (N = 3393)				6-year follow-up (N = 1899)
	Boys (N = 1692)		Girls (N = 1701)		Boys (N = 946)		Girls (N = 953)
Country	N	%	N	%	N	%	N	%
Italy	178	10.5	176	10.3	139	14.7	112	11.8
Estonia	346	20.4	372	21.9	219	23.2	216	22.7
Cyprus	73	4.3	73	4.3	25	2.6	31	3.3
Belgium	127	7.5	126	7.4	32	3.4	35	3.7
Sweden	77	4.6	90	5.3	63	6.7	57	6.0
Germany	256	15.1	250	14.7	120	12.7	149	15.6
Hungary	161	9.5	154	9.1	177	18.7	176	18.5
Spain	474	28.0	460	27.0	171	18.1	177	18.6
Parental education (ISCED levels)
Missing	5	0.3	1	0.1	3	0.3	3	0.3
Low (levels 0–2)	101	6.0	102	6.0	32	3.4	32	3.4
Medium (levels 3–5)	770	45.5	742	43.6	402	42.5	416	43.7
High (levels 6–8)	816	48.2	856	50.3	509	53.8	502	52.7
Age (years)	Mean	SD	Mean	SD	Mean	SD	Mean	SD
Age at baseline	6.1	1.8	6.3	1.7	5.9	1.8	6.1	1.8
Age at follow-up	8.1	1.8	8.2	1.8	11.7	1.8	11.9	1.8
BMI percentilea
BMI (PCTL.) at baseline	57.3	29.6	59.0	29.1	56.3	29.5	58.1	28.9
BMI (PCTL.) at follow-up	60.2	30.0	60.3	29.9	64.5	28.5	62.2	29.0
Accelerometer wear time (min./day)
Wear time at baseline	704.5	120.4	699.6	126.1	708.8	137.4	707.3	135.4
Wear time at follow-up	695.8	110.1	698.5	109.5	754.9	114.5	757.3	101.3
MVPA (min./day)
MVPA at baseline	55.5	22.5	47.6	19.9	53.4	22.9	46.2	19.3
MVPA at follow-up	57.6	25.0	48.2	21.7	58.5	24.6	47.9	20.4

Abbreviations: ISCED International Standard Classification of Education, BMI body mass index, MVPA moderate-to-vigorous physical activity

^a Based on the (IOTF) BMI percentile curves updated by Cole & Lobstein [29]