A pragmatic two-armed cluster randomized controlled
trial (RCT) will be carried out in mental health outpatient
clinics in the Netherlands. A Collaborative Care program
will be executed in the experimental condition, whereas
the control condition will continue to deliver Care as
Usual (CAU). CC will be performed by the CC-team, with
mental health nurses in a coordinating role. Baseline mea-
surements will be obtained at inclusion and follow-up
measurements will take place at 6 months and 12 months.
The primary outcome measures are psychosocial function-
ing, symptoms, and quality of life. Secondary outcome
measures are mastery, attitude towards medication and
satisfaction with care. Family members or friends of
patients will be asked to fill in questionnaires regarding
perceived burden and satisfaction with car