Mousavi 2008.

Study characteristics
Methods	Study design: randomised controlled trial Study grouping: parallel group Adequate power (evidence of power calculation): no information provided Allocation concealment method: no information provided Blinding of outcome assessors: not blinded to assist treatment alliance Check of blinding: no information provided Duration of study: 2005–2006 Randomisation method: no information provided
Participants	Baseline characteristics Intervention n: 20 Control n: 20 Overall n: 40 Sex (% woman): 66% Educational status: regarding patients’ educational level: 5 were illiterate (6%), 17 had finished primary school (21%), 9 secondary school (24%) and 29 high school (36%). 10 (13%) participants had university qualification. Inclusion criteria: outpatient referrals with conversion disorder except epileptiform subtype; aged 10–50 years; onset of illness in the past 24 hours; no history of conversion disorder in the year before study Exclusion criteria: non‐consenting patients or careers; non‐compliance after initial agreement; failing to enter in trance state; no accessibility for 1‐month follow‐up after treatment. Pretreatment: uncertain. No baseline demographics given per groups.
Interventions	Intervention characteristics Intervention Description: hypnosis. The psychiatrist used hypnosis to put the participants in a trance state Length of treatment: 2 hours Longest follow‐up after end of treatment: 1 month Co‐medications/other treatments while in the study: participants and their families were educated about the symptoms and relapse signature and the role of psychosocial stressors as precipitating factors. Medication was used to treat any comorbid mood or anxiety disorders. Control Description: diazepam (intravenous injection, 5 mg in 1 minute) Length of treatment: 2 hours Longest follow‐up after end of treatment: 1 month Comedications/other treatments while in the study: participants and their families were educated about the symptoms and relapse signature and the role of psychosocial stressors as precipitating factors. Medication was used to treat any comorbid mood or anxiety disorders. The study included two other interventions, relaxation and suggestion, which were not relevant to the review.
Outcomes	Symptom freedom Outcome type: dichotomous Relapse Outcome type: dichotomous
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	High risk	Quote: "We managed to include 20 patients in each group randomly." Comment: no information on how this was done.
Allocation concealment (selection bias)	Unclear risk	No information provided.
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	No information provided.
Blinding of outcome assessment (detection bias) All outcomes	High risk	Quote: "the psychiatrist who carried out the assessment and the therapeutic works was not blind to the intervention groups. This was to improve the rapport and therapeutic relationship, which is necessary for treatment of conversion disorder."
Incomplete outcome data (attrition bias) All outcomes	High risk	Unclear what the outcomes were and how the outcomes were measured. There was a lack of untreated controls.
Selective reporting (reporting bias)	High risk	No baseline characteristics, or individual group data
Other bias	Low risk	No apparent sources of bias.