Main characteristics and participation rate of European adolescents included in the HELENA study

Table 3 Characteristics of the 710 non-participating adolescents from participating classes compared to participating adolescents in HELENA study ^#

CITIES	Sex ratio (M/F)		Age(years) (mean ± SD)		BMI (kg/m ²) (mean ± SD)
CITIES	Non-participants	Participating adolescents	Non-participants	Participating adolescents	Non-participants	Participating adolescents
Athens	NA	51/49	NA	13.9 ± 1.2	NA	21.8 ± 3.8
Dortmund	40/60	43/57	15.0 ± 1.0	15 ± 1.4	21.2 ± 5.2	21.8 ± 4.2
Ghent	49/51	54/46	15.0 ± 1.5	15 ± 1.3	20.9 ± 3.6	20.3 ± 3.2
Heraklion	NA	54/46	NA	14 ± 1.3	NA	23.2 ± 4.5
Lille	57/43	58/42	13.8 ± 1.4	14.4 ± 1.2	19.5 ± 6.2	20.5 ± 3.7
Pecs	NA	50/50	NA	15 ± 1.2	NA	21.4 ± 3.6
Roma	40/60	60/40	15.2 ± 1.6	15.5 ± 1.7	21.8 ± 4	22.2 ± 4.0
Stockholm	47/53	61/39	14.1 ± 1.2	15 ± 1.4	20.9 ± 3.2	20.5 ± 3.2
Vienna	44/66	51/49	15.1 ± 1.4	15.3 ± 1.5	22.2 ± 5.1	21.7 ± 3.7
Zaragoza	43/57	51/49	14.6 ± 1.2	14.6 ± 1.3	20.5 ± 1.9	21.6 ± 3.3
TOTAL	320/390	53.3/46.7^NS	16.6 ± 1.2**	14.8 ± 1.2^NS	21.1 ± 4.2**	21.5 ± 3.9** ^NS

ISSN: 2049-3258