Heller 1995.

Methods	Setting: New South Wales, Australia. Recruitment. Patients were identified whilst in hospital by nurses. Randomisation: RCT 2 arm. There was no clear definition of peer support, however study met the inclusion criteria of using peers that shared one or several key characteristics of the target population. Peer training: No information was provided on peer training.
Participants	424 patients aged less than 75 years discharged from hospital with a diagnosis of myocardial infarction or other ischaemic heart disease.
Interventions	Intervention: low level of advice by lay persons from the Australian Cardiac Association (ACA) who had suffered from heart disease ‐ most subjects received only a single telephone call. Caller: Call was made by peer supporters. Control group: Usual care.
Outcomes	Physical health outcomes: investigations and interventions performed ‐ self report (questionnaire developed for use in study (not validated)). Psychological health outcomes: Quality of Life ‐ self report (validated questionnaire for post‐myocardial infarction). Behavioural health outcomes: behaviour change (cigarette smoking, diet) ‐ self report (questionnaire developed for use in study (not validated)). Social health outcome: none reported. Impact on participants: memory of contact by the ACA or other counsellor ‐ self report (question developed for use in study (not validated)). Impact on peer supporter: none reported. Method of assessing outcome measures: mailed questionnaire
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Adequate sequence generation?	Unclear risk	Unclear.
Allocation concealment?	Unclear risk	B ‐ Unclear.
Blinding? Participants	Unclear risk	Unclear.
Blinding? Providers	Unclear risk	Unclear.
Blinding? Outcome assessors	Unclear risk	Unclear.
Blinding? Data analysts	Unclear risk	Unclear.
Incomplete outcome data addressed? All outcomes	Unclear risk	Intention to treat analysis ‐ not stated.
Free of selective reporting?	Low risk	All outcomes reported.