Welcome! This webinar has been made possible with support from the Canadian Institutes of Health Research Preventing Alcohol and Marijuana Use Among Youth: What’s the evidence? You will be placed on hold until the webinar begins. The webinar will begin shortly, please remain on the line.
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Preventing Alcohol and Marijuana Use Among Youth: What’s the evidence?
Presented as part of a Canadian Institutes of Health funded Knowledge Translation Supplement grant (KTB-112487) (2 of 8 webinars). Recorded June 27, 2012.
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Welcome! This webinar has been made possible with support from the
Canadian Institutes of Health Research
Preventing Alcohol and Marijuana Use
Among Youth:
What’s the evidence? You will be placed on hold until the webinar begins.
The webinar will begin shortly, please remain on the line.
What’s the evidence? Lemstra, M., Bennett, N., Nannapaneni, U.,
Neudorf, C., Warren, L., Kershaw, T., Scott, C. (2010). A systematic review of school-based marijuana and alcohol prevention programs targeting adolescents aged 10-15. Addiction Research and Theory, 18(1): 84-96.
Review Lemstra, M., Bennett, N., Nannapaneni, U., Neudorf,
C., Warren, L., Kershaw, T., Scott, C. (2010). A systematic review of school-based marijuana and alcohol prevention programs targeting adolescents aged 10-15. Addiction Research and Theory, 18(1): 84-96.
Evaluation Please check your email for the evaluation
survey link after the webinar. It take 5 minutes to complete!
If you did not personally register for the webinar, please e-mail Jennifer McGugan at
Summary Statement: Lemstra (2010) P 10-15 years I (A) Knowledge-only program: Provision of anti-drug
information in school setting (B) Comprehensive program: Intervention A plus
development of refusal, self- management, and social skills C Usual care OR knowledge only (e.g., pamphlet) O Primary outcome: Long-term reduction in
marijuana/alcohol use Secondary Outcomes: Effectiveness of Intervention A
vs. Intervention B
Quality Rating: 9 (strong)
Overall Considerations Comprehensive program: Mean reduction of 12 days of alcohol use/month 7 days of marijuana use/month
Knowledge-only program: Mean reduction of 2 days of alcohol use/month (non-significant) 25 days of marijuana use/month Confounding factors not considered (e.g. age, gender, socioeconomic status)
General Implications Public health SHOULD promote / support / implement: School-based Comprehensive programs Minimum one year duration Knowledge-only programs (if comprehensive programming is not
possible)
Summary of Included Studies
What’s the evidence? Comprehensive Programs Marijuana use Mean absolute reduction of 7 days/month (MUR
0.93, 95%CI 0.92-0.94) vs. no intervention
Alcohol use Mean absolute reduction of 12 days/month (MUR
0.88, 95%CI 0.87-0.89) vs. no intervention
Comprehensive Programs With & Without Stratification
Promote and support long-term comprehensive programming to reduce alcohol and marijuana use
Includes development of life skills, refusal skills and self-management skills in programming
Comprehensive programming is preferable to knowledge-only for reducing alcohol and marijuana use
Implications: Practice & policy Comprehensive Programs
What’s the evidence? Knowledge-only Programs
Marijuana use Single study reported a significant reduction Mean absolute reduction of 25 days/month (MUR
0.75, 95% CI 0.63 – 0.87) Insufficient data to pool statistically
Alcohol use Mean absolute reduction of 2 days/month (MUR
0.98, 95% CI 0.92-1.04)
Knowledge-only Programs With & Without Stratification
Shift existing knowledge-only programs to long-term comprehensive programs to reduce alcohol use
New programming should include a skill development focus to reduce both alcohol and marijuana use
Implications: Practice & policy Knowledge-only Programs
Overall Considerations Comprehensive program: Mean reduction of 12 days of alcohol use/month 7 days of marijuana use/month
Knowledge-only program: Mean reduction of 2 days of alcohol use/month (non-significant) 25 days of marijuana use/month Confounding factors not considered (e.g. age, gender, socioeconomic status)
General Implications Public health SHOULD promote / support / implement: School-based Comprehensive programs Minimum one year duration Knowledge-only programs if comprehensive programming is not
possible
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