Holyoake offers a range substance use programs designed for “Men”, “Women”, “Young adults”, “Relationships” and “Parents or Partner”. This project evaluate the effectiveness of the programs at 3 and 9 months after commencement. The study will combine baseline administrative data (demographics) treatment information (number and type of session e.g. group or individual) with telephone interviews on current substance use and mental wellbeing. This will allow the effectiveness of the programs in general to be assessed, plus the importance of specific elements (type of session, involvement of partner / parent in the program) to be examined.