Table 1 Overview of measurements
Measurement | Baseline (screening) | Follow-up I (2 months after baseline) | Follow-up II (6 months after baseline) | Follow-up III (12 months after baseline) |
|---|---|---|---|---|
Demographic characteristics | * | * | * | * |
Truancy | * | * | * | * |
Alcohol: | ||||
   Drinking behaviour | * | * | * | * |
   Drinking motives | * | * | * | * |
   Drinking problems | * | * | * | * |
   Perceived parental rules | * | * | * | * |
   Drinking parents | * | * | * | * |
Tobacco: | * | * | * | * |
   Smoking behavior | * | * | * | * |
   Smoking parents | * | * | * | * |
   Perceived parental rules | * | * | * | * |
Marijuana: | * | * | * | * |
   Marijuana-using behaviour | * | * | * | * |
   Marijuana parents | * | * | * | * |
Other: | * | * | * | * |
   Personality | * | * | * | * |
   Anxiety | * | * | * | * |
   Psychological problems | * | * | * | * |
   Delinquency | * | * | * | * |
   Depression | * | * | * | * |
   Self control | * | * |  |  |