Since 1971, a national drug habit survey has been conducted among Swedish ninth graders. From 2004, annual survey are also being conducted among students in the second year of high school.
The Swedish Council for Information on Alcohol and Other Drugs (CAN) are responsible for the annual survey since 1986.
The surveys explore the development of young people´s drug habits over time and indicate differences between gender and regions. In addition, the collected data enable more detailed analysis of consumption, correlations between drug use and risk- and protective factors etc.
300 classes are randomly invited to participate in the study, which are are conducted by anonymous group surveys in the classroom, monitored by teachers. About 15-20 % of the randomly selected classes are not participating in the study, and the none-response on the individual level is about the same level.
CAN also conduct regional and local school surveys upon requests from municipalities and regions.