Mayer 1991

Methods	Randomised controlled trial with two groups.
Participants	Country: USA. Setting: other. Health problem: breast self‐examination. Recruitment: adverts. Participants: female University employees (n=36).
Interventions	Contract features: Form: written; Parties: patients‐carers; Incentives: deposit; Co‐interventions: yes. Experimental group: contract to remind to perform breast self‐examination. Control group: no contracting.
Outcomes	Frequency of breast self‐examination, and frequency of being prompted.
Notes
Risk of bias
Item	Authors' judgement	Description
Allocation concealment?	Unclear	B ‐ Unclear