Lindsay 2009.

Methods	Study design: Randomised controlled trial. Control group: The control group received new computers and broadband access, although they did not have access to the portal. Weekly drop‐in sessions and phone‐in support was available.
Participants	Study location: UK. CHD diagnosis/treatment: No CHD history/diagnosis details provided, although it is described that participants were drawn from GPs CHD registries. Mean age: 62.9 Percentage men: 72.66% Number of participants recruited: 108 Participant ethnicity: Not reported. Recruited online or offline? Offline, from GP practices.
Interventions	Name of the intervention: Hearts of Salford. Intervention aim: Improve management of heart disease and influence health behaviours. Intervention features: The main focus was 5 discussion forums, which were moderated by a researcher for 6 months and then unmoderated for 3 months. During the 6‐month moderated phase, the moderator would stimulate discussions and encourage participants to join in. During the unmoderated phase, the moderators still examined the discussion forum, although they did not start new threads. The website also contained a glossary, information resources about CHD, diet, exercise, and smoking. In addition, links and information about local resources were given. How was the intervention introduced to the sample? Participants received training on how to use the portal, however it is unclear who offered this training and whether it was a face‐to‐face introduction. Was there any contact between the researcher/healthcare professional and the sample during the intervention? During the moderated phase (first 6 months) participants had access to 2 forms of communication with moderators via either the discussion forum or one‐to‐one instant messaging. Duration of the intervention? 6 months moderated discussion forum and 3 months unmoderated discussion forum, 9 months in total.
Outcomes	Outcomes: 1. Physical activity. Measurement tool: Authors describe that this was assessed in terms of asking ‘how many days during a typical week do you spend in moderate exercise?' 2. Diet. Measurement tool: Items taken from Health Survey for England. 3. Healthcare utilisation. Measurement tool: All visits to a GP, nurse, specialist, and other healthcare providers in the past month. Time points: At baseline, 6 months and 9 months.
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Method of randomisation not described
Allocation concealment (selection bias)	Unclear risk	Method of allocation concealment not described
Blinding of participants and personnel (performance bias) All outcomes	High risk	No blinding, and the outcomes may have been influenced by the lack of blinding
Blinding of outcome assessment (detection bias) All outcomes	High risk	No blinding, and the outcomes may have been influenced by the lack of blinding
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	The results tables in the paper suggest no participant dropouts, however the text reports that 4 participants dropped out. Attempts to contact the authors for an explanation were unsuccessful
Selective reporting (reporting bias)	Unclear risk	Study protocol is not available