The Moderated Mediation Relationship Between Trait Impulsivity, Emotional Regulation, ADHD Hyperactivity/Impulsivity, and Oppositional Defiant Disorder Symptoms in Emerging Adults

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Introduction/Objective: The present study explored a moderated mediation model within a cohort of emerging adults, examining the interplay between Trait Impulsivity (TI), Emotional Regulation (ER), and symptoms of ADHD Hyperactivity/Impulsivity (HI) and Oppositional Defiant Disorder (ODD). Methods: Utilizing a convenience sample of 210 emerging adults (men = 49, women = 161; mean age 21.17 years; SD = 2.20 years), the study employed standardized measures to analyze the relationships between TI, HI, ODD, and ER, using Hayes’s macro for SPSS Process model 14. Results: The findings showed that HI mediated the association between TI and ODD and that ER moderated the association between HI and ODD, such that lower levels of ER increased the association. Conclusion: These findings align with the Trait Impulsivity Hypothesis (TIH), extending its application by integrating temperament literature on ADHD. This study contributes to the theoretical and practical understanding of impulsivity's role in externalizing disorders, highlighting the importance of ER in this dynamic.

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  • Cite Count Icon 3
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Attention deficit hyperactivity and oppositional defiant disorder symptoms in adolescence and risk of substance use disorders-A general population-based birth cohort study.
  • Jul 11, 2023
  • Acta Psychiatrica Scandinavica
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Externalizing symptoms are associated with risk of future substance use disorder (SUD). Few longitudinal studies exist using general population-based samples which assess the spectrum of attention deficit hyperactivity disorder (ADHD) and oppositional defiant disorder (ODD) symptoms. We aimed to study the associations between adolescent ADHD symptoms and subsequent SUD and additionally examine whether the risk of SUD is influenced by comorbid oppositional defiant disorder (ODD) symptoms. The Northern Finland Birth Cohort 1986 was linked to nationwide health care register data for incident SUD diagnoses until age 33 years (n = 6278, 49.5% male). ADHD/ODD-case status at age 16 years was defined using parent-rated ADHD indicated by Strengths and Weaknesses of ADHD symptoms and Normal Behaviors (SWAN) questionnaire with 95% percentile cut-off. To assess the impact of ODD comorbidity on SUD risk, participants were categorized into four groups based on their ADHD/ODD case status. Cox-regression analysis with hazard ratios (HRs) and 95% confidence intervals (CIs) were used to study associations between adolescent ADHD/ODD case statuses and subsequent SUD. In all, 552 participants (8.8%) presented with ADHD case status at the age of 16 years, and 154/6278 (2.5%) were diagnosed with SUD during the follow-up. ADHD case status was associated with SUD during the follow-up (HR = 3.84, 95% CI 2.69-5.50). After adjustments for sex, family structure, and parental psychiatric disorder and early substance use the association with ADHD case status and SUD remained statistically significant (HR = 2.60, 95% CI 1.70-3.98). The risk of SUD remained elevated in individuals with ADHD case status irrespective of ODD symptoms. ADHD in adolescence was associated with incident SUD in those with and without symptoms of ODD. The association of ADHD and SUD persisted even after adjustment for a wide range of potential confounds. This emphasizes the need to identify preventative strategies for adolescents with ADHD so as to improve health outcomes.

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