From: Test implementation of a school-oriented drug prevention program “Study without Drugs”: pre- and post-testing for effectiveness
Type of drug
Mean
Cigarettes
12.9
Alcohol
13.2
Tranquillizers
13
Stimulants
13.7
Solvents & Inhalants
11.9
Marijuana
15.2
Hashish
15.4
Other drugs
Any illicit drug