Table 1.

Primary diagnosis inclusion criteria of included studies.

Study	Primary diagnosis inclusion criteria
Callcott et al., 2004; Hamblen et al., 2004; Kevan et al., 2007; Kayrouz and Vrklevski, 2015	Not applicable as case study/case series
Rosenberg et al., 2004	DSM-IV diagnosis of schizophrenia, schizoaffective disorder, major depression or psychotic disorder not otherwise specified
Bernard et al., 2006; Jackson et al., 2009	ICD-10 diagnosis of schizophrenia, persistent delusional disorders, acute and transient psychotic disorders or schizoaffective disorders (ICD-10 F20, F22, F23, F25)
Mueser et al., 2007	Severe mental illness as defined by DSM-IV Axis I or II disorder and functional impairment with respect to ability to work or care for oneself
Trappler and Newville, 2007; Frueh et al., 2009	DSM-IV diagnosis of schizophrenia or schizoaffective disorder
Mueser et al., 2008; Lu et al., 2009	DSM-IV diagnosis of schizophrenia, schizoaffective disorder, major depression or bipolar disorder
van den Berg and van der Gaag, 2012	Schizophrenia Spectrum Disorder (Diagnostic system not specified)
de Bont et al., 2013a; van den Berg et al., 2015	DSM-IV diagnosis of a psychotic disorder or mood disorder with psychotic features