Besharat 2001.

Methods	RCT
Participants	Country: Not reported in paper (author affiliation listed as Iran; personal correspondence revealed study undertaken in the UK) Diagnostic tool: DSM‐IV and ICD‐10 No. screened: No detail No. randomised: 58 (although the results of 62 participants are reported) No. started trial: No detail No. dropped out during intervention: No detail No. dropped out during follow‐up: No. analysed (observed case): 62 (despite 58 being included in study) Mean age in years (SD): Total: 26.1 (6.6) Age range in years: Total: No detail Gender %: No detail Subtype purging %: No detail Subtype restricting %: No detail Age of onset: Total: No detail Duration of illness: No detail Baseline weight: The ABW, expressed as a percentage of the mean population weight matched for age and height, for the entire sample was 71.8 kg (7.8%) Baseline BMI: No detail Baseline eating disorder scale score: No detail Baseline eating disorder scale score: No detail Baseline purging: No detail Comorbidity: No detail (although must be BN as mixed sample) Details on living arrangements: In 53.3% the family composition was dual‐parental, composed of mother, father and participant, while 26.6% were single‐parent families, mainly mother and the participant, and 20% were marital families, husband and wife Family education/employment/income: Recruitment strategy: No detail Exclusion criteria: No detail
Interventions	Setting of care: No detail Training/qualification of care provider(s): No detail Treatment manual: No detail Supervision of treatment: No detail Adherence to treatment: No detail Intervention group 1 Description: Family therapy No further details Length: Up to 1 year Intervention group 2 Description: Supportive therapy No further details Length: Up to 1 year Intervention group 3 Description: Individual focal psychoanalytic psychotherapy No further details Length: Up to 1 year Intervention group 4 Description: Cognitive analytic therapy No further details Length: Up to 1 year
Outcomes	Standardised clinical family interview expressed emotion Morgan‐Russell outcome assessment
Notes	The results from the studies are only reported as group totals for AN versus BN participants. No information is provided for study outcomes by treatment group
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Participants described as "randomly assigned" in abstract. No further details
Allocation concealment (selection bias)	Unclear risk	No detail
Blinding of participants and personnel (performance bias) All outcomes	High risk	Therapists and participants cannot be blinded in trials of family‐based therapy
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	No detail
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	58 study participants are described in the abstract. However, outcomes for 62 participants are reported in Table 1
Selective reporting (reporting bias)	High risk	No results from the actual RCT for therapy outcomes reported by intervention group. Outcomes only reported by AN vs BN and pre‐intervention Expressed Emotion results
Other bias	Unclear risk	No useable data