|
Norway (n = 329)
|
|
Girls (a), %
|
60.2
|
|
Age (m)
|
14.58
|
0.31
|
|
Hyperactivity (a)
|
1.13
|
0.53
|
|
Conduct problems (a)
|
2.60
|
2.87
|
|
Early sexual intercourse (a), %
|
8.3
|
|
Smoking (a), %
|
25.4
|
|
Friends’ substance use (a), %
|
43.3
|
|
Mother’s education (m)
|
|
Primary school (9 years or less), %
|
3.4
|
|
Secondary school (1–3 years), %
|
37.5
|
|
Higher education (≤4 years), %
|
25.7
|
|
Higher education (> 4 years), %
|
33.4
|
|
Poor family management (a)
|
1.85
|
0.58
|
|
Alcohol and drug use in the family (a), %
|
10.3
|
|
Australia (n = 786)
|
|
Girls (a), %
|
54.8
|
|
Age (m)
|
14.89
|
0.38
|
|
Impulsivity (a)
|
2.06
|
0.53
|
|
Conduct problems (a)
|
1.12
|
0.30
|
|
Early sexual intercourse (a), %
|
11.1
|
|
Smoking (a), %
|
53.0
|
|
Friends’ substance use (a), %
|
80.0
|
|
Mother’s education (m)
|
|
Primary school, %
|
42.2
|
|
Completed secondary school, %
|
31.9
|
|
Higher education, %
|
26.1
|
|
Poor family management (a)
|
1.86
|
0.48
|
|
Alcohol and drug use in the family (a), %
|
13.4
|
