Effectiveness of the universal prevention program 'Healthy School and Drugs': Study protocol of a randomized clustered trial

Table 1 Overview of measurements

Measurement	Baseline	Follow-up I (8 months after baseline)	Follow-up II (20 months after baseline)	Follow-up III (32 months after baseline)
Demographic characteristics	*	*	*	*
Alcohol:	*	*	*	*
Drinking behavior	*	*	*	*
Perceived parental rules	*	*	*	*
Intention	*	*	*	*
Global attitudes	*	*	*	*
Pros and cons	*	*	*	*
Social norm (approval)	*	*	*	*
Modeling	*	*	*	*
Self-efficacy	*	*	*	*
Knowledge	*	*	*	*
Tobacco:	*	*	*	*
Smoking behavior	*	*	*	*
Nicotine dependence	*	*	*	*
Perceived parental rules	*	*	*	*
Intention	*	*	*	*
Global attitudes	*	*	*	*
Pros and cons	*	*	*	*
Social norm (approval)	*	*	*	*
Modeling	*	*	*	*
Self-efficacy	*	*	*	*
Knowledge	*	*	*	*
Marijuana:	*	*	*	*
Marijuana using behavior	*	*	*	*
Marijuana dependence	*	*	*	*
Perceived parental rules	*	*	*	*
Intention	*	*	*	*
Global attitudes	*	*	*	*
Pros and cons	*	*	*	*
Social norm (approval)	*	*	*	*
Modeling	*	*	*	*
Self-efficacy	*	*	*	*
Knowledge	*	*	*	*
Other:	*	*	*	*
Risk perception	*	*	*	*
Popularity	*	*	*	*
Likability	*	*	*	*
Best friends	*	*	*	*
Personality	*	*	*	*
Pubertal development	*	*	*	*

ISSN: 1471-2458