Contingency management to promote treatment engagement in comorbid alcohol use disorder and alcohol-related liver disease: Findings from a pilot randomized controlled trial

Background

Alcohol-related liver disease (ARLD) is a leading cause of preventable death and health inequalities. Evidence-based interventions for comorbid alcohol use disorder (AUD) and ARLD remain limited, and only a small proportion of this clinical population engages with treatment. There is a need to improve patient outcomes by bridging this gap through novel, person-centred interventions. Contingency management (CM) is a psychosocial intervention that involves gradual, increasing incentives upon the completion of treatment-related goals, such as treatment attendance. This single-centre, randomized pilot trial of voucher-based CM was conducted to promote treatment engagement in comorbid AUD and ARLD.

Methods

Thirty service users were recruited from an inpatient setting, offered integrated liver care (ILC) and allocated to ILC only or ILC + CM. Primary outcomes included feasibility criteria (recruitment, study retention post-randomization, completeness of data and protocol fidelity). Secondary outcome data on engagement, alcohol intake, and liver function were also collected. Data were gathered at baseline, post-ILC, and 12 weeks post-ILC and analyzed through descriptive statistics.

Results

The feasibility of the research was subject to challenges inherent to conducting applied health research in a real-world clinical setting. The recruitment and retention rates were 73.20% and 36.70%, respectively. All participants received CM per protocol. An increasing trend in engagement was observed in the ILC + CM compared to ILC only (67% vs. 33%). A trending 76% reduction in alcohol intake and an overall improvement in liver outcomes were observed among participants engaging with the trial, with no significant differences between control and treatment groups.

Conclusion

Overall, the CM intervention was feasible to deliver and appears promising in improving outcomes in individuals with comorbid AUD and ARLD. Aspects related to recruitment, study retention post-randomization, and protocol fidelity need to be further adapted before proceeding with a definitive trial.