Change in alcohol demand following a brief intervention predicts change in alcohol use: A latent growth curve analysis

Background The association between behavioral economic demand and various alcohol use outcomes is well established. However, few studies have examined whether changes in demand occur following a brief alcohol intervention (BAI), and whether this change predicts alcohol outcomes over the long term. M...

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Published in:Alcoholism, clinical and experimental research clinical and experimental research, 2022-08, Vol.46 (8), p.1525-1538
Main Authors: Gex, Kathryn S., Acuff, Samuel F., Campbell, Kevin W., Mun, Eun‐Young, Dennhardt, Ashley A., Borsari, Brian, Martens, Matthew P., Murphy, James G.
Format: Article
Language:English
Subjects:
Adolescent
Adult
alcohol
Alcohol Drinking - epidemiology
Alcohol Drinking - therapy
Alcohol use
Alcoholism
behavioral economics
brief motivational intervention
Clinical outcomes
Crisis Intervention
demand
Drinking behavior
Economics, Behavioral
emerging adults
Ethanol
Female
Humans
Intervention
Male
Therapy
Young adults
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Summary:Background The association between behavioral economic demand and various alcohol use outcomes is well established. However, few studies have examined whether changes in demand occur following a brief alcohol intervention (BAI), and whether this change predicts alcohol outcomes over the long term. Methods Parallel process piecewise latent growth curve models were examined in a sample of 393 heavy drinking emerging adults (60.8% women; 85.2% white; Mage = 18.77). In these models, two linear slopes represented rates of change in alcohol use, heavy drinking episodes, alcohol‐related problems, and demand (intensity and highest expenditure across all price points or Omax) from baseline to 1 month (slope 1) and 1 month to 16 months (slope 2). Mediation analyses were conducted to estimate the effect of a BAI on 16‐month alcohol outcomes through slope 1 demand. Results A two‐session BAI predicted significant reductions in all five outcomes from baseline to 1‐month follow‐up. Although no further reduction was observed from the 1‐month to the 16‐month follow‐up, there was no regression to baseline levels. Slope 1 demand intensity, but not Omax, significantly mediated the association between BAI and both outcomes—heavy drinking episodes (Est. = −0.23, SE = 0.08, p 
ISSN:0145-6008
1530-0277
DOI:10.1111/acer.14887