The cohort study supra-f is a longitudinal study from 2005 to 2008. The cohort study is a follow-up study of supra-f, which took place between 1999 and 2004. The aim of the cohort study is to prolong the data collection of the youths involved in supra-f in order to be able to follow their development in terms of integration, well-being and substance consumption. This allows to gain more knowledge about the longterm effects of secondary prevention in the supra-f centres.

supra-f is a research project in the domain of substance abuse prevention and the promotion of health for youths at risk living in Switzerland. After the three points of measure during supra-f, two further waves of data collection will take place for the cohort study. The first wave from 2005 until the end of 2006 has already been completed and the second wave from 2007 to 2008 is about to take place.

Our ideal would be to reach all of the 1500 youths that took place in the supra-f study for the further two data collections. For obvious reasons, however, we already know we will not be able to reach all of the initial participants (due to adress changes, emigration, in extreme cases due homelessness etc.).

The five points of measure will allow us to follow the development of youths at risk over five to 10 years until adulthood. The most important aspects to us are mental health, substance abuse and in particular social and vocational integration. It will also be possible to compare the postulated differential development between youths that have completed a program in one of the  supra-f centres from their peers in control group. This means that the cohort study will allow us to evaluate the longterm effectivity of supra-f.