O'Leary 1994.

Methods	Allocation: Randomised controlled trial, Duration: not described; Follow‐up period: six month; Patient blinding adequate; Outcome blinding: seems adequate; Intention to treat analysis not mentioned, 12 of the participants dropped out of treatment.
Participants	Diagnosis: DSM‐III criteria for major depression; Age 60 ‐ 85 years; participants had been referred for ECT treatment, no information is provided on earlier antidepressant treatment in any of the participants; N = 35; Sex: not provided
Interventions	Sham ECT, versus unilateral or bilateral ECT; maximum number of study ECT‐treatment 6; method of seizure induction described
Outcomes	Mood change: Hamilton Depression Rating Scale (HDRS), Montgomery Asberg Depression Rating Scale (MADRS) Side effects: no information provided.
Notes	Reexamination of outcome data from the Nottingham ECT trial from 1985
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment (selection bias)	Unclear risk	B ‐ Unclear