Study	Reason for exclusion
Arora 2011	Implementation of a telemedicine project, not mental health‐specific.
Baker 2001	Guideline implementation study.
Bauer 2011	Study of collaborative care.
Bogner 2012	Study of collaborative care.
Carr 1997	Controlled before and after study, did not have two intervention and two control sites.
Chung 2011	Quality Improvement programme based on training and discussion lists.
Dietrich 2004	Study of collaborative care.
Harvey 2012	Pre‐post study with one measure at each interval.
Horner 2005	Study of collaborative care.
Liu 2007	Patients were being managed in general medical clinic in a general hospital.
Llewellyn‐Jones 1999	Shared care intervention.
Menchetti 2007	Whether treatment was delivered by primary care providers, the consultant psychiatrist, community mental health centre, or a combination of these was based on a treatment algorithm.
Serrano 2011	Study of collaborative care.
Sherbourne 2001	Trial of recommendations to use psychotherapy or medications compared to standard care.
Sinnema 2011	Study of interventions to improve guideline implementation.
Stiefel 2008	Patient participants had a complex medical illness not a mental disorder.
Su 2011	Chart review of consultation liaison service in a general hospital.
Tello‐Bernabe 2011	Implementation of Clinical Practice Guidelines.
Wells 1999	Interaction between mental health specialist and primary care provider was educational not consultative.
Wiener 2006	Before and after study of consultation liaison utilisation and satisfaction.