CapOpus is the name of a randomized controlled trial (RCT) running in Denmark at Psychiatric Center Bispebjerg (part of Region Hovedstadens Psykiatri) and physically located at Bispebjerg Hospital in Copenhagen.
Among the trial's funders are the Lundbeck foundation, the Municipality of Copenhagen, and Sygekassernes Helsefond.
The primary outcome of the trial is reduction in number of days using cannabis, as measured by the timeline followback instrument.
As secondary outcomes, the trial measures level of psychopathology in terms of positive and negative symptoms with the PANSS instrument; cognitive function using a set of validated tests; and quality of life and related life-areas measured with the Manchester Short Assessment of Quality of Life instrument and the World Health Organization's Disability Assessment Schedule.
The presence of mental illness and cannabis dependency, abuse, or harmful use is established using the SCAN interview's chapters 11 and 12.