Table 1 Variables used in logistic regression models, and their origins in different study phases.

Health 2000*

   Questionnaire

Parental alcohol problems

   Interview

Attention or behavior problems at school, Parental basic education, Learning difficulties at school

MEAF**

   Questionnaire

Aggression, Anxiousness, Age at initiation of daily smoking, Age at initiation of drinking to intoxication

   Interview

SUD diagnoses, Basic education