Cost-effectiveness of emergency department-initiated treatment for opioid dependence.

Background and Aims In a recent randomized trial, patients with opioid dependence receiving brief intervention, emergency department (ED)-initiated buprenorphine and ongoing follow-up in primary care with buprenorphine (buprenorphine) were twice as likely to be engaged in addiction treatment compared with referral to community-based treatment (referral) or brief intervention and referral (brief intervention). Our aim was to evaluate the relative cost-effectiveness of these three methods of intervening on opioid dependence in the ED. Design Measured health-care use was converted to dollar values. We considered a health-care system perspective and constructed cost-effectiveness acceptability curves that indicate the probability each treatment is cost-effective under different thresholds of willingness-to-pay for outcomes studied. Setting An urban ED in the United States. Participants Opioid-dependent patients aged 18 years or older. Measurements Self-reported 30-day assessment data were used to construct cost-effectiveness acceptability curves for patient engagement in formal addiction treatment at 30 days and the number of days illicit opioid-free in the past week. Findings Considering only health-care system costs, cost-effectiveness acceptability curves indicate that at all positive willingness-to-pay values, ED-initiated buprenorphine treatment was more cost-effective than brief intervention or referral. For example, at a willingness-to-pay threshold of $1000 for 30-day treatment engagement, we are 79% certain ED-initiated buprenorphine is most cost-effective compared with other studied treatments. Similar results were found for days illicit opioid-free in the past week. Results were robust to secondary analyses that included patients with missing cost data, included crime and patient time costs in the numerator, and to changes in unit price estimates. Conclusion In the United States, emergency department-initiated buprenorphine intervention for patients with opioid dependence provides high value compared with referral to community-based treatment or combined brief intervention and referral.