“…Three studies [ 37 , 39 , 40 ] used the Diagnostic and Statistical Manual of Mental Disorders, 4th edition (DSM IV), 1 [ 41 ] used the International Classification of Diseases, 10th revision (ICD-10), and the remaining studies did not mention the use of a classification of mental disorders. Samples including people with schizophrenia (69%) [ 30 , 32 , 35 - 39 , 41 , 42 ] were most common among the 13 included studies, followed by samples where participants were affected by depression (62%) [ 31 , 32 , 34 - 36 , 38 , 39 , 42 ], schizoaffective disorder (46%) [ 30 , 37 - 39 , 41 , 42 ], anxiety disorders (38%) [ 31 , 34 , 36 , 39 , 42 ], and bipolar disorder (38%) [ 32 , 36 , 38 , 40 , 42 ]. Single studies reported that participants had severe mental illness (SMI) (eg, schizophrenia, schizoaffective disorder, bipolar disorder, and major depression) [ 33 ], mental disorders [ 36 ], psychotic disorders [ 39 ], and substance use disorder [ 39 ] but did not state any particular mental disorder.…”