Table 2.

Data to be extracted from studies

Domain	Data
Publication details	Author Year Funder
Participant characteristics	Age Sex Socio-economic status/income/occupation
Programme/intervention characteristics	Number of sessions Time period Length of each session Format of sessions (group, activities, educational, online) Behaviour change techniques used
Outcomes	Weight outcomes (baseline & end of programme, or amount lost) How weight is determined (measured or disclosed) How outcomes were assessed Levels of attrition Levels of adherence
Comparison of successful and unsuccessful	Identified barriers or facilitators (either through process evaluation data or participant feedback) Differences between successful/unsuccessful (i.e. attendance rates, social support, compliance, baseline characteristics)