Table 1 Demographic characteristics of analytic sample

Total number of participants surveyed

333

100

186

100

519

100

Sex

 Male

151

45.3

105

56.5

256

49.2

 Female

182

54.7

81

43.6

263

50.6

Age

 10

21

6.3

2

1.1

24

4.6

 11

133

39.9

6

3.2

139

26.8

 12

169

50.8

17

9.4

186

35.8

 13

10

3.0

22

11.8

32

6.2

 14

–

–

28

15.1

28

5.4

 15

–

–

18

9.7

18

3.4

 16

–

–

25

13.4

25

4.8

 17

–

–

27

14.5

27

5.2

 Mean Age (SD)

11.5

0.7

14.5

1.9

12.4

1.8

Health

 General Health Scale (1–4)

2.3

0.5

2.3

0.6

2.3

0.5

 Pubertal Development Scale Girls (0–3)²

1.5

1.1

1.8

1.1

1.6

1.1

 Pubertal Development Scale Boys (0–3)²

1.1

1.1

1.3

1.0

1.1

1.1