Attention deficit hyperactivity disorder (ADHD) is among the most common, intensely
investigated, and yet diagnostically controversial neurobehavioral conditions of childhood …

Objective: As part of a larger epidemiologic study of risk factors for attention-deficit
hyperactivity disorder (ADHD), this pilot study combined parent and teacher information to …

BACKGROUND AND OBJECTIVE: Overdiagnosis and underdiagnosis of attention-
deficit/hyperactivity disorder (ADHD) are widely debated, fueled by variations in prevalence …

Background Emerging epidemiological data suggest that hundreds of primary studies have
examined the prevalence of ADHD in children and adolescents and dozens of systematic …

Objective: To examine the evidence for and against the classification of attention-deficit
hyperactivity disorder (ADHD) as a valid disease entity, as defined by the Diagnostic and …

Attention‐deficit/hyperactivity disorder (ADHD) is the most common neurodevelopmental
disorder of childhood. However, basic information about how the prevalence of ADHD varies …

Abstract Background Attention-Deficit/Hyperactivity Disorder is a developmental
neurological disorder that has three basic characteristics: Attention Deficit, Hyperactivity, and …

Objectives This report summarizes current scientific evidence from the literature in four
areas: the prevalence of attention-deficit/hyperactivity disorder (ADHD) among children 6 to …

This study aims to review the nosology and epidemiology of attention-deficit/hyperactivity
disorder (ADHD) in children aged 2 through 5 years. Studies, primarily in community or …

Background: Earlier studies point to the prevalence of attention deficit hyperactivity disorder
(ADHD) to be similar around the world. There is, however, a wide variety in estimates. The …