The current study expands on that pilot, and is one of just a few rigorous studies on the connection between meditation and addiction. For instance in 2009, the University of Washington published the results of a study involving a group of 168 recovering addicts (various substances). These were randomized into two groups: a mindfulness-based relapse prevention (MBRP) program that met weekly for eight weeks, and a “treatment as usual” (TAU) program, including a 12-step program and weekly group support sessions. Two months after the completion of the program, MBRP participants reported substance abuse at levels that were half those of the group following the TAU, as well as significantly less craving.  More: University of Wisconsin (Study Details) Mindfulness Based Relapse Prevention, University of Washington