Associations of observed callous-unemotional behaviors in early childhood with conduct problems and substance use over 14 years.
Level 3 - non-randomized controlled study
Prospective longitudinal cohort study with a 14-year follow-up.
PubMed 36914291 · doi:10.1017/S0954579421000791
What was done
A prospective cohort of 246 children (47.6% girls) aged 4–7 years was evaluated using a standardized behavioral task where they were prompted to tear an experimenter's valued photograph. Blind raters coded early callous-unemotional (CU) behaviors. Participants were followed prospectively over 14 years to evaluate oppositional defiant and conduct symptoms, conduct disorder diagnoses, and age of onset of substance use.
What was found
Children exhibiting greater CU behaviors during the baseline task were significantly more likely to meet criteria for conduct disorder (n = 52 total cases) into early adulthood compared to those with fewer CU behaviors (odds ratio 7.61, 95% CI 2.96–19.59, p < .0001), and had significantly more severe conduct problems. Greater baseline CU behaviors also predicted an earlier age of onset of substance use (B = -0.69, SE = 0.32, t = -2.14, p = .036).
Why it matters
This demonstrates that an objective, task-based observation of callous-unemotional traits in early childhood (ages 4–7) can serve as a robust long-term prognostic marker for severe externalizing psychopathology and adolescent substance use.
Limits
The sample size is moderate (N = 246) and observational in nature, leaving potential unmeasured confounding from parenting styles, socioeconomic background, or co-occurring developmental traits. Specific types or severity of substance use were not detailed in the abstract.