Schulman 1980

Methods	Randomised controlled trial with three groups.
Participants	Country: USA. Setting: hospital. Health problem: hypertension. Recruitment: health system. Participants: adults (n=105).
Interventions	Contract features: Form: written; Parties: self‐commitment; Incentives: other; Co‐interventions: yes. Group 1: Education booklet plus contingency contracts with behavioural goals; patients received an agreed reward from a nurse for certain behaviours. Group 2: Education booklet. Group 3: Usual care only.
Outcomes	Active patient orientation score, indices of resources score and facts index.
Notes
Risk of bias
Item	Authors' judgement	Description
Allocation concealment?	Unclear	B ‐ Unclear