Khattak 2006.

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: no information provided Check of blinding: no information provided Duration of study: April 2004 to September 2004 Randomisation method: method not mentioned
Participants	Baseline characteristics Intervention n: 50 Control n: 50 Overall n: 100 Age (mean): 24.3 (SD 8.76) years Sex (% woman): 88% Marital status currently married (%): 60% Educational status: 71% uneducated Inclusion criteria: symptoms according to ICD‐10 (WHO classification of psychiatric diseases) criteria for dissociative disorder were included in the study. People presenting with convulsions only were included in this study. Exclusion criteria: co‐existing physical illness or another psychiatric disorder except anxiety and depressive disorder Pretreatment: no statistically significant differences at baseline between groups.
Interventions	Intervention characteristics Intervention Description: behaviour therapy sessions daily during admission + RCC. The salient features of behaviour therapy were developed in consultation with clinical psychologist. Length of treatment: 5 weeks Longest follow‐up after end of treatment: no follow up Comedications/other treatments while in the study: RCC, defined as all the measures taken for controlling symptoms, which includes drug treatment, reassurance and explanation given to patients and their relatives about the illness. Control Description: RCC, defined as all the measures taken for controlling symptoms, which includes drug treatment, reassurance and explanation given to patients and their relatives about the illness. Length of treatment: 5 weeks Longest follow‐up after end of treatment: no follow up Comedications/other treatments while in the study: none
Outcomes	Symptom severity (CGI) Outcome type: continuous Mental state – anxiety (HADS) Outcome type: continuous Mental state – depression (HADS) Outcome type: continuous Dropout Outcome type: dichotomous Data value: endpoint
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Quote: "After entry into the study, patients were allocated randomly, either to the intervention or control group on 1:1 ratio." Comment: method not mentioned.
Allocation concealment (selection bias)	Unclear risk	No information provided.
Blinding of participants and personnel (performance bias) All outcomes	High risk	Personnel were not blinded, unclear if patient groups were kept separately.
Blinding of outcome assessment (detection bias) All outcomes	High risk	Quote: "absence of a blind rater,"
Incomplete outcome data (attrition bias) All outcomes	Low risk	Did not seem so. Dropouts were reported.
Selective reporting (reporting bias)	High risk	Baseline characteristics were not provided, which hindered an assessment on whether sufficient randomisation was obtained.
Other bias	Low risk	No other apparent sources of bias.