Four studies, involving 594 participants, were included. Half of the trials were rated as having a high or unclear risk of bias. The studies
considered six different psychosocial interventions grouped into four comparisons: (1) cognitive-behavioural coping skills training
versus 12-step facilitation (one study; 41 participants), (2) brief intervention versus treatment as usual (one study; 110 participants),
(3) group or individual motivational interviewing (MI) versus hepatitis health promotion (one study; 256 participants) and (4) brief
motivational intervention (BMI) versus assessment-only (one study; 187 participants). Differences between studies precluded any data
pooling. Findings are described for each trial individually