[The attention deficit hyperactivity disorder myth or reality?].

Area of Science:

• Neurodevelopmental Disorders
• Child Psychiatry
• Epidemiology

Context:

• Attention deficit hyperactivity disorder (ADHD) is clinically defined by issues with self-control, including short attention span, hyperactivity, and poor impulse control.
• Recent decades have seen evolving psychiatric definitions of ADHD, impacting diagnostic criteria and symptom combinations.
• Variations in reported ADHD prevalence rates across studies are largely attributed to these definitional changes.

Purpose:

• To examine how methodological challenges in epidemiological study designs contribute to heterogeneous data on ADHD.
• To explore factors influencing ADHD diagnosis and prevalence, including assessment methods, sample types, information sources, and sociocultural characteristics.

Summary:

• Methodological difficulties in epidemiological studies, coupled with evolving diagnostic criteria, create heterogeneous data, leading to questions about ADHD validity.
• Assessment methods, sample types (clinical vs. community), informant sources (parents, teachers, children), and sociocultural factors further complicate ADHD prevalence.
• Despite these challenges, ADHD is confirmed as a valid disorder with consistent clinical characteristics observed globally in children.

Impact:

• Highlights the need for standardized methodologies in ADHD research to ensure reliable prevalence data.
• Underscores the importance of considering diverse factors influencing ADHD diagnosis and interpretation in epidemiological contexts.
• Provides evidence supporting the clinical reality and validity of ADHD in children worldwide, countering skepticism.