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Can cannabis use be prevented by targeting personality risk in schools? Twenty-four-month outcome of the adventure trial on cannabis use: a cluster-randomized controlled trial.

ABSTRACT: AIMS:To examine the effectiveness of a personality-targeted intervention program (Adventure trial) delivered by trained teachers to high-risk (HR) high-school students on reducing marijuana use and frequency of use. DESIGN:A cluster-randomized controlled trial. SETTING:Secondary schools in London, UK. PARTICIPANTS:Twenty-one secondary schools were randomized to intervention (n?=?12) or control (n?=?9) conditions, encompassing a total of 1038 HR students in the ninth grade [mean (standard deviation) age?=?13.7 (0.33) years]. INTERVENTIONS:Brief personality-targeted interventions to students with one of four HR profiles: anxiety sensitivity, hopelessness, impulsivity and sensation-seeking. MEASUREMENTS: PRIMARY OUTCOME:marijuana use. Secondary outcome: frequency of use. Assessed using the Reckless Behaviour Questionnaire at intervals of 6?months for 2?years. Personality risk was measured with the Substance Use Risk Profile Scale. FINDINGS:Logistic regression analysis revealed significant intervention effects on cannabis use rates at the 6-month follow-up in the intent-to-treat sample [odds ratio (OR)?=?0.67, P?=?0.05, 95% confidence interval (CI)?=?0.45-1.0] and significant reductions in frequency of use at 12- and 18-month follow-up (??=?-0.14, P???0.05, 95% CI?=?-0.6 to -0.01; ??=?-0.12, P???0.05, 95% CI?=?-0.54 to 0.0), but this was not supported in two-part latent growth models. Subgroup analyses (both logistic and two-part models) reveal that the sensation-seeking intervention delayed the onset of cannabis use among sensation seekers (OR?=?0.25, ??=?-0.833, standard error?=?0.342, P?=?0.015). CONCLUSIONS:Personality-targeted interventions can be delivered effectively by trained school staff to delay marijuana use onset among a subset of high-risk teenagers: sensation-seekers.

SUBMITTER: Mahu IT

PROVIDER: S-EPMC5034824 | biostudies-literature | 2015 Oct

REPOSITORIES: biostudies-literature

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Can cannabis use be prevented by targeting personality risk in schools? Twenty-four-month outcome of the adventure trial on cannabis use: a cluster-randomized controlled trial.

Mahu Ioan T IT Doucet Christine C O'Leary-Barrett Maeve M Conrod Patricia J PJ

Addiction (Abingdon, England) 20150714 10

<h4>Aims</h4>To examine the effectiveness of a personality-targeted intervention program (Adventure trial) delivered by trained teachers to high-risk (HR) high-school students on reducing marijuana use and frequency of use.<h4>Design</h4>A cluster-randomized controlled trial.<h4>Setting</h4>Secondary schools in London, UK.<h4>Participants</h4>Twenty-one secondary schools were randomized to intervention (n = 12) or control (n = 9) conditions, encompassing a total of 1038 HR students in the ninth ...[more]

PMID: 26011508

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Dataset Information

Can cannabis use be prevented by targeting personality risk in schools? Twenty-four-month outcome of the adventure trial on cannabis use: a cluster-randomized controlled trial.

Publications

Can cannabis use be prevented by targeting personality risk in schools? Twenty-four-month outcome of the adventure trial on cannabis use: a cluster-randomized controlled trial.

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