TY - JOUR
T1 - Change in alcohol demand following a brief intervention predicts change in alcohol use
T2 - A latent growth curve analysis
AU - Gex, Kathryn S.
AU - Acuff, Samuel F.
AU - Campbell, Kevin W.
AU - Mun, Eun Young
AU - Dennhardt, Ashley A.
AU - Borsari, Brian
AU - Martens, Matthew P.
AU - Murphy, James G.
N1 - Funding Information:
This work was supported by the National Institute of Health grants R01AA020829 to James G. Murphy, F31AA026486 and T32DA007288 (PI: McGinty) to Kathryn S. Gex, and F31AA027140 to Samuel F. Acuff. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health, the Department of Veterans Affairs, or the United States Government.
Funding Information:
This work was supported by the National Institute of Health grants R01AA020829 to James G. Murphy, F31AA026486 and T32DA007288 (PI: McGinty) to Kathryn S. Gex, and F31AA027140 to Samuel F. Acuff. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health, the Department of Veterans Affairs, or the United States Government.
Publisher Copyright:
© 2022 by the Research Society on Alcoholism.
PY - 2022/8
Y1 - 2022/8
N2 - 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 < 0.01) and alcohol-related problems (Est. = −0.15, SE = 0.07, p < 0.05)—at the 16-month follow-up. Conclusions: Reducing high valuation of alcohol among heavy drinking emerging adults within the first month following BAI is critical for the long-term efficacy of the intervention. A two-session BAI was associated with enduring reductions in alcohol demand, and the change in demand intensity, but not Omax, was associated with sustained reductions in heavy drinking and alcohol-related problems.
AB - 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 < 0.01) and alcohol-related problems (Est. = −0.15, SE = 0.07, p < 0.05)—at the 16-month follow-up. Conclusions: Reducing high valuation of alcohol among heavy drinking emerging adults within the first month following BAI is critical for the long-term efficacy of the intervention. A two-session BAI was associated with enduring reductions in alcohol demand, and the change in demand intensity, but not Omax, was associated with sustained reductions in heavy drinking and alcohol-related problems.
KW - alcohol
KW - behavioral economics
KW - brief motivational intervention
KW - demand
KW - emerging adults
UR - http://www.scopus.com/inward/record.url?scp=85133142954&partnerID=8YFLogxK
U2 - 10.1111/acer.14887
DO - 10.1111/acer.14887
M3 - Article
C2 - 35707989
AN - SCOPUS:85133142954
SN - 0145-6008
VL - 46
SP - 1525
EP - 1538
JO - Alcoholism: Clinical and Experimental Research
JF - Alcoholism: Clinical and Experimental Research
IS - 8
ER -