Table 1

Description of the children and adolescents at baseline

Intervention groupControl group
Children (n=375)Adolescents (n=94)Children (n=327)Adolescents (n=98)
Age (mean±SD)9.21 (0.56)13.2 (0.58)9.23 (0.59)13.1 (0.61)
Gender
 Boys, % (n)54.7 (205)47.4 (45)47.7 (156)40.6 (40)
 Girls, % (n)45.3 (170)52.6 (49)52.3 (171)59.4 (58)
Ethnicity
 West Europe, % (n)55.2 (207)85.1 (82)73.7 (241)80.4 (78)
 East Mediterranean, % (n)31.2 (117)8.9 (6)14.7 (48)8.3 (9)
 East-Central Europe, % (n)2.9 (11)2.0 (2)4.0 (13)4.1 (4)
 American Regions, % (n)8.3 (31)3.0 (3)6.4 (21)6.2 (6)
 African Regions, % (n)1.3 (5)1.0 (1)0.3 (1)0
 South-West Asia, % (n)0.3 (1)001.0 (1)
 West of Pacific, % (n)0.8 (3)00.9 (3)0
  • Ethnicity was documented according to the WHO (WHO presence in countries, territories and areas, 2015).