Impact of a new specialist alcohol and drug brief intervention service model integrated into the emergency department: An interrupted time series analysis

Abstract

Objective: To describe and examine the impact of a new specialist drug and alcohol brief intervention team (DABIT) model integrated into the ED on the identification of individuals at risk of future alcohol and other drug (AOD)-related harm. A cost-outcome analysis was conducted to assess the impact on costs per referral. Methods: An interrupted time series analysis examined the changes in number of referrals following the implementation of the DABIT model over 2 years (January 2015–December 2016) within a large 436-bed public hospital. The primary outcome of interest was the number of AOD-related referrals per month identified following ED presentations. The independent variables were: time (measured in months), implementation periods (pre-implementation; a transition period of adjustment during which the new DABIT model of care was developed; post-implementation period with a fully operational DABIT model); and the number of full-time equivalent staff per month to account for the increase in labour productivity. In a second time series analysis, the outcome was cost per referral per month. Results: After controlling for changes in labour productivity, the number of referrals was significantly higher following the implementation of the DABIT model when compared to those during the pre-implementation and transition periods. Costs were significantly lower following DABIT implementation resulting in $1096 net cost savings per referral. Conclusions: Integration of a specialist brief intervention AOD model to support ED care may increase uptake of specialist AOD treatment and could be beneficial from an economic efficiency viewpoint.