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Attention-deficit/hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterized by persistent inattention, hyperactivity, and impulsivity. It affects approximately 5-8% of children globally, with around 60-70% of cases persisting into adulthood. ADHD has significant implications for educational attainment, social interactions, and occupational success.
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Area of Science:

  • Neurodevelopmental disorders
  • Cardiovascular epidemiology
  • Genetic epidemiology

Background:

  • Observational studies suggest links between ADHD, ASD, and cardiovascular diseases (CVD).
  • Causal relationships and mediating factors remain unclear.
  • This study investigates the causal impact of ADHD and ASD on CVD risk.

Purpose of the Study:

  • To examine the causal relationship between ADHD, ASD, and CVD risk.
  • To identify mediating factors in the association between ADHD, ASD, and CVD.
  • To inform targeted interventions for individuals with ADHD or ASD.

Main Methods:

  • Two-sample Mendelian randomization (MR) using large-scale GWAS summary statistics.
  • Exploration of mediating factors using two-step MR and multivariable MR.

Main Results:

  • ADHD is causally associated with increased risk of coronary heart disease, heart failure, and large-artery stroke.
  • ASD is causally associated with increased risk of atrial fibrillation and heart failure.
  • Smoking, opioid use, triglycerides, education, income, deprivation, and obesity are potential mediating factors.

Conclusions:

  • This MR study confirms causal links between ADHD, ASD, and CVD.
  • Highlights the need for cardiovascular surveillance in individuals with ADHD or ASD.
  • Suggests interventions targeting identified mediating factors to reduce CVD events.