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The overall effect of parental supply of alcohol across adolescence on alcohol-related harms in early adulthood-a prospective cohort study


Clare, PJ and Dobbins, T and Bruno, R and Peacock, A and Boland, V and Yuen, WS and Aiken, A and Degenhardt, L and Kypri, K and Slade, T and Hutchinson, D and Najman, JM and McBride, N and Horwood, J and McCambridge, J and Mattick, RP, The overall effect of parental supply of alcohol across adolescence on alcohol-related harms in early adulthood-a prospective cohort study, Addiction, 115, (10) pp. 1833-1843. ISSN 0965-2140 (2020) [Refereed Article]

Copyright Statement

Copyright 2020 Society for the Study of Addiction

DOI: doi:10.1111/add.15005


Background and Aims Recent research suggests that parental supply of alcohol is associated with more risky drinking and alcohol-related harm among adolescents. However, the overall effect of parental supply throughout adolescence remains unclear, because parental supply of alcohol varies during adolescence. Due to the complexity of longitudinal data, standard analytical methods can be biased. This study examined the effect of parental supply of alcohol on alcohol-related outcomes in early adulthood using robust methods to minimize risk of bias. Design Prospective longitudinal cohort study. Setting Australia Participants A cohort of school students (n = 1906) recruited in the first year of secondary school (average age 12.9 years) from Australian schools in 201011, interviewed annually for 7 years. Measurements The exposure variable was self-reported parental supply of alcohol (including sips/whole drinks) during 5 years of adolescence (waves 15). Outcome variables were self-reported binge drinking, alcohol-related harm and symptoms of alcohol use disorder, measured in the two waves after the exposure period (waves 67). To reduce risk of bias, we used targeted maximum likelihood estimation to assess the (counterfactual) effect of parental supply of alcohol in all five waves versus no supply on alcohol-related outcomes. Findings Parental supply of alcohol throughout adolescence saw greater risk of binge drinking [risk ratios (RR) = 1.53; 95% confidence interval (CI) = 1.271.84] and alcohol-related harms (RR = 1.44; 95% CI = 1.221.69) in the year following the exposure period compared with no supply in adolescence. Earlier initiation of parental supply also increased risk of binge drinking (RR = 1.10; 95% CI = 1.051.14), and any alcohol-related harm (RR = 1.09; 95% CI = 1.051.13) for each year earlier parental supply began compared with later (or no) initiation. Conclusions Adolescents whose parents supply them with alcohol appear to have an increased risk of alcohol-related harm compared with adolescents whose parents do not supply them with alcohol. The risk appears to increase with earlier initiation of supply.

Item Details

Item Type:Refereed Article
Keywords:parental supply of alcohol, Adolescence, alcohol, cohort studies, confounding, epidemiology, targeted maximum likelihood
Research Division:Psychology
Research Group:Clinical and health psychology
Research Field:Health psychology
Objective Division:Health
Objective Group:Public health (excl. specific population health)
Objective Field:Substance abuse
UTAS Author:Bruno, R (Associate Professor Raimondo Bruno)
UTAS Author:Peacock, A (Miss Amy Peacock)
ID Code:142472
Year Published:2020
Funding Support:National Health and Medical Research Council (APP1146634)
Web of Science® Times Cited:1
Deposited By:Psychology
Deposited On:2021-01-19
Last Modified:2021-03-22

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