O'Farrell 1984

Methods	Randomised controlled trial with three groups.
Participants	Country: USA. Setting: other. Health problem: addictions (alcohol). Recruitment: health system. Participants: men (n=36) and their wives.
Interventions	Contract features: Form: written; Parties: tripartite; Incentives: none; Co‐interventions: yes. Group 1: Contract: The husband agrees to take disulfiram (Antabuse) daily and the wife observes and records it. In return she agrees not to mention any past drinking or any fears about future drinking. Couple counselling stressing goodwill and caring behaviours. Group 2: Couple counselling with catharsis, ventilation, sharing of feelings. Group 3: No marital treatment.
Outcomes	Satisfaction with the programme, ability to solve problems and adherence to sessions.
Notes
Risk of bias
Item	Authors' judgement	Description
Allocation concealment?	Unclear	B ‐ Unclear