Oppositional defiant disorder in adults with ADHD.

Area of Science:

• Psychiatry
• Neuroscience
• Clinical Psychology

Background:

• Oppositional defiant disorder (ODD) is a frequent comorbidity in childhood attention-deficit/hyperactivity disorder (ADHD).
• This study prospectively investigated ODD symptoms in adults diagnosed with ADHD.

Purpose of the Study:

• To explore the prevalence and impact of oppositional defiant disorder (ODD) symptoms in adults with attention-deficit/hyperactivity disorder (ADHD).
• To assess the treatment response to methylphenidate transdermal system (MTS) in ADHD patients with and without ODD symptoms.

Main Methods:

• A placebo-controlled, double-blind trial involving 86 adult ADHD patients treated with methylphenidate transdermal system (MTS).
• Patients were categorized based on the presence of ODD symptoms in childhood and adulthood.
• Baseline and outcome differences were compared between patient groups.

Main Results:

• 42% of adult ADHD patients met criteria for ODD, exhibiting greater impairment in ADHD, personality disorder, and substance abuse measures.
• 27% had childhood ODD that resolved in adulthood, with significant correlation between childhood and adult ODD symptoms.
• MTS treatment led to significant improvements in both ODD and ADHD symptoms (p < .001), with the most pronounced effects observed in patients with adult ODD.

Conclusions:

• A substantial proportion (69%) of adult ADHD patients experienced ODD symptoms either in childhood or adulthood.
• Understanding the complex interplay between ODD and ADHD is crucial for addressing comorbidities like personality disorders and substance abuse.
• These findings have significant clinical, social, and theoretical implications for managing ADHD with comorbid ODD.