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Table 1 Descriptives of study variables

From: Predicting hazardous drinking in late adolescence/young adulthood from early and excessive adolescent drinking - a longitudinal cross-national study of Norwegian and Australian adolescents

  Mean Standard deviation
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
  1. Note. Variables are measured differently in the Norwegian and Australian samples and values are therefore not directly comparable
  2. (a) = Adolescent self-report; (m) = Mother’s report