Effectiveness of text message interventions with different behavior change techniques on alcohol consumption among young adults: a five-arm randomized controlled trial

Abstract

Aims: This studys aim is to test the effectiveness of five interventions each utilizing a unique set of behavior change techniques on reducing alcohol consumption at 3 and 6 months among young adults with hazardous drinking.

Design, setting and participants: This study used a five-arm parallel randomized controlled trial with 3- and 6-month follow-ups. Recruitment occurred at four emergency departments in Pittsburgh, PA, USA. Participants were non-treatment-seeking young adults (mean age = 22.1 years; 68.5% female; 37.1% black) who reported hazardous drinking.

Interventions: Participants were randomized to one of five automated text message interventions for 12 weeks that interacted with participants on the 2 days per week that they typically drank: assisted self-monitoring (TRACK: control condition; n = 245), pre-drinking cognition feedback (PLAN; n = 226), alcohol consumption feedback (USE; n = 235), adaptive goal support (GOAL; n = 214) and a combination of interventions (COMBO; n = 221).

Measurements: Primary outcome was number of past month binge drinking days at 3-month post-randomization calculated from a 30-day time-line follow-back. Primary intention-to-treat analysis compared PLAN, USE, GOAL and COMBO against TRACK (control condition). The four active conditions were not compared against each other. A secondary outcome, durability of effects, was measured at 6 months.

Findings: From baseline to 3-month follow-up (retention = 81.1%), compared with TRACK, in which past-month mean binge drinking days increased from 2.7 to 3.4, mean binge drinking days decreased in COMBO from 3.0 to 2.3 [adjusted β = -0.52; 95% confidence interval (CI) = -0.77, -0.26], GOAL from 3.0 to 2.6 (adjusted β = -0.34; 95% CI = -0.59, -0.10) and USE from 3.3 to 2.9 (adjusted β = -0.38; 95% CI = -0.62, -0.14). At 6 months (retention = 73.8%), COMBO, GOAL, USE and PLAN had significantly lower mean binge drinking days compared with TRACK.

Conclusion: Text message interventions incorporating feedback on either drinking plans and/or alcohol consumption and/or drinking limit goal support produced small yet durable reductions in binge drinking days in non-treatment-seeking young adults with hazardous drinking.

Keywords: Alcohol; binge drinking; clinical trial; digital; intervention; young adult.