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

*

*

Lammers et al. BMC Public Health 2011 11:126   doi:10.1186/1471-2458-11-126