Table 1 Characteristics of study population of children at age 15 years. N = 2,278

Gender

Female

1,237

54.3

Male

1,041

45.7

Lifestyle factors

Body Mass Index for age

Severe thinness

57

2.9

Normal weight

1,640

83.0

Overweight

216

10.9

Obese

62

3.1

Smoking habits

Not smoker smoke

1,857

89.3

Daily smoker

222

10.7

Indicators of status

School performance

Mean (SD). scale; 0-13

8.99

1.17

Self-assessed position in school class

Mean (SD). scale;1-10

7.08

1.72

Parental educational level

<10 year

255

11.2

10-12 years

1,169

51.4

>13

852

37.4

Household income, DKR

Mean (SD)

2,276

573,574 (250,511)

Social relations with parents

Overprotective parents

Mean (SD) scale; 4-16

8.10

2.63

Family functioning

Mean (SD), scale;1-4

1.72

0.50

Personal psychological characteristics

Self-esteem

Mean (SD) scale: 6-24

19.08

2.90

Sense of Coherence (Meaningfulness)

Mean (SD) scale: 5-20

14.37

2.14

Active coping

Mean (SD) scale: 1-4

2.65

0.52

Avoidance coping

Mean (SD) scale: 1–3.5

1.94

0.47