The great decline in adolescent risk behaviours: Unitary trend, separate trends, or cascade?
Level 5 - mechanism / opinion, no new human data
Narrative review and multi-country trend synthesis without systematic review methodology (graded by design analogy).
OpenAlex W4311753458 · doi:10.1016/j.socscimed.2022.115616
What was done
Authors collated and reviewed previously published data from 1990 to 2019 on adolescent smoking, alcohol consumption, cannabis use, early sexual initiation, and juvenile crime across Australia, England, the Netherlands, New Zealand, the USA, and European averages. They evaluated empirical evidence for three non-mutually exclusive hypotheses: a unitary trend driven by common contextual factors, separate trends driven by behaviour-specific causes, and a cascade effect where drops in primary risk behaviours reduce downstream risks.
What was found
The abstract reports no numerical values, percentage changes, or effect sizes. It reports theoretical and empirical support for a unitary trend, highlighting decreased unstructured face-to-face time with peers as a common driver across countries. It also identifies behaviour-specific drivers, including stronger tobacco control policies and lower peer approval for smoking, as well as tighter parental rules and reduced alcohol access for drinking. Evidence for cascade effects (such as declines in smoking and drinking suppressing cannabis use) was judged to be equivocal.
Why it matters
This review integrates multiple hypotheses explaining the 25-year decline in youth risk behaviours across high-income countries, demonstrating that the trend cannot be reduced to a single intervention or broad social shift alone.
Limits
The abstract reports no quantitative metrics or sample sizes. The synthesis relies on previously published macro-level observational data from high-income nations, preventing generalization to other settings. Many proposed causal pathways remain untested empirically.
Cited by
- supports Members of the current younger generation consume less alcohol, have less sex, and live with their parents longer compared to previous generations at the same age.