Conduct and oppositional behavior in childhood and attention problems in adolescence independently predicted problematic cannabis use by age 25, even after accounting for other mental health conditions.
Read this if you're interested in what childhood behaviors might signal future cannabis risk.
9.1% of participants developed problematic cannabis use by age 25
What the researchers found
In a cohort followed from birth to age 25, childhood conduct and oppositional defiant behaviors (measured between ages 4.5 and 11) predicted problematic cannabis use in young adulthood. This held true even after controlling for co-occurring symptoms like attention problems, hyperactivity, and internalizing disorders.
During adolescence (age 15), the picture shifted. Attention problems, rather than conduct issues, became the significant predictor of later problematic cannabis use when controlling for comorbidity.
Neither hyperactivity/impulsivity nor internalizing disorders (anxiety, depression) independently predicted problematic cannabis use at either developmental stage.
Why it matters
This study suggests that the pathway to problematic cannabis use may begin years before any drug exposure. By identifying specific childhood behaviors that increase risk, it points toward early intervention opportunities, particularly for children with conduct problems and adolescents with attention difficulties.
The numbers in context
Of 307 participants followed to age 25, 28 (9.1%) developed problematic cannabis use. Childhood conduct/oppositional behavior and adolescent attention problems were statistically significant predictors after controlling for comorbidities.
How the study worked
Data came from the Mannheim Study of Children at Risk, an epidemiological cohort study following children from birth through adulthood. Researchers assessed psychopathology at ages 4.5 to 11 (childhood) and 15 (adolescence) using standardized measures, then evaluated cannabis use at age 25 through clinical interviews and self-report questionnaires. Of 307 participants, 28 (9.1%) met criteria for problematic cannabis use.
What this study cannot tell us
The sample was relatively small (307 participants, 28 with problematic use), limiting statistical power. The study is observational, so it cannot confirm that behavior problems cause later cannabis use. Cultural and policy differences between Germany and other countries may affect generalizability.
How to read the evidence
Longitudinal cohort study following children from birth to age 25. Strong design for identifying developmental predictors, but limited by small sample size.
When this study was published
Published in 2016. The developmental psychopathology perspective on substance use risk continues to be validated in larger studies.
The bigger picture
The developmental sequence matters: conduct problems in childhood and attention problems in adolescence represent different windows of vulnerability. This suggests that the relationship between behavioral difficulties and later cannabis problems is not a single fixed trait but evolves through developmental stages, potentially requiring different prevention approaches at different ages.
Questions still open
- What mechanisms link childhood conduct problems to later cannabis use? Does treating attention problems in adolescence reduce cannabis risk? Would these findings replicate in larger, more diverse cohorts?
Common questions
Does ADHD cause cannabis addiction?
Can early intervention prevent later cannabis problems?
Read the original research
Predicting later problematic cannabis use from psychopathological symptoms during childhood and adolescence: Results of a 25-year longitudinal study.
Drug and alcohol dependence, 163, 251-5
Citation
Zohsel, Katrin; Baldus, Christiane; Schmidt, Martin H; Esser, Günter; Banaschewski, Tobias; Thomasius, Rainer; Laucht, Manfred. (2016). Predicting later problematic cannabis use from psychopathological symptoms during childhood and adolescence: Results of a 25-year longitudinal study.. Drug and alcohol dependence, 163, 251-5. https://doi.org/10.1016/j.drugalcdep.2016.04.012
Explore the wider topic
- How to Talk to Your Teenager About Weed (Without Losing Them)
- My Kid's Friends Smoke Weed: A Parent's Guide
- I Smoke Weed But Don't Want My Kids To: Navigating the Hypocrisy
- Quitting Weed as a Parent: Why It Is the Hardest and Most Important Quit
- Quitting Weed as a Teen or Young Adult
- My Kid Is Smoking Weed: A Parent's Guide