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Randomized Controlled Trial
. 2014 Sep 1;142:301-6.
doi: 10.1016/j.drugalcdep.2014.06.039. Epub 2014 Jul 11.

Use of Continuous Transdermal Alcohol Monitoring During a Contingency Management Procedure to Reduce Excessive Alcohol Use

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Free PMC article
Randomized Controlled Trial

Use of Continuous Transdermal Alcohol Monitoring During a Contingency Management Procedure to Reduce Excessive Alcohol Use

Donald M Dougherty et al. Drug Alcohol Depend. .
Free PMC article

Abstract

Background: Research on contingency management to treat excessive alcohol use is limited due to feasibility issues with monitoring adherence. This study examined the effectiveness of using transdermal alcohol monitoring as a continuous measure of alcohol use to implement financial contingencies to reduce heavy drinking.

Methods: Twenty-six male and female drinkers (from 21 to 39 years old) were recruited from the community. Participants were randomly assigned to one of the two treatment sequences. Sequence 1 received 4 weeks of no financial contingency (i.e., $0) drinking followed by 4 weeks each of $25 and then $50 contingency management; Sequence 2 received 4 weeks of $25 contingency management followed by 4 weeks each of no contingency (i.e., $0) and then $50 contingency management. During the $25 and $50 contingency management conditions, participants were paid each week when the Secure Continuous Remote Alcohol Monitor (SCRAM-II™) identified no heavy drinking days.

Results: Participants in both contingency management conditions had fewer drinking episodes and reduced frequencies of heavy drinking compared to the $0 condition. Participants randomized to Sequence 2 (receiving $25 contingency before the $0 condition) exhibited less frequent drinking and less heavy drinking in the $0 condition compared to participants from Sequence 1.

Conclusions: Transdermal alcohol monitoring can be used to implement contingency management programs to reduce excessive alcohol consumption.

Keywords: Contingency management; Excessive alcohol use; Transdermal alcohol monitoring.

Conflict of interest statement

Conflicts of Interest

None of the authors have conflicting interests concerning this manuscript.

Figures

Fig. 1
Fig. 1
(a) Percent of participants exceeding contingency criteria (TAC ≥ 0.03 g/dl) and (b) average number of days per week that participants had peak TAC (PkTAC) > 0, under: $0 (circles), $25 (triangles), and $50 (squares) contingency management conditions.
Fig. 1
Fig. 1
(a) Percent of participants exceeding contingency criteria (TAC ≥ 0.03 g/dl) and (b) average number of days per week that participants had peak TAC (PkTAC) > 0, under: $0 (circles), $25 (triangles), and $50 (squares) contingency management conditions.
Fig. 2
Fig. 2
Average percent days (by days of the week) that participants had (a) estimated peak BrAC (eBrAC) ≥ 0.08% BAC and (b) peak TAC (PkTAC) > 0, under: $0 (circles), $25 (triangles), and $50 (squares) contingency management conditions.
Fig. 2
Fig. 2
Average percent days (by days of the week) that participants had (a) estimated peak BrAC (eBrAC) ≥ 0.08% BAC and (b) peak TAC (PkTAC) > 0, under: $0 (circles), $25 (triangles), and $50 (squares) contingency management conditions.
Fig. 3
Fig. 3
Sequence and carryover effect on percent days per week that participants had estimated peak BrAC (eBrAC) ≥ 0/08% BAC under: $0 (circles), $25 (triangles), and $50 (squares) contingency management conditions. Sequence 1 participants = closed symbols; Sequence 2 participants = open symbols.
Fig. 4
Fig. 4
Average percent days that participants were in high (eBrAC ≥ .08% BAC), moderate (TAC ≥ .03 g/dl and eBrAC < 08% BAC), low (TAC > 0 but < .03 g/dl), and no drinking level categories, under: $0, $25, and $50 contingency management conditions.

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