Objective: Despite a prevailing assumption that adult ADHD is a childhood-onset
neurodevelopmental disorder, no prospective longitudinal study has described the …

Background Adult ADHD has been assumed to be a continuation of childhood‐onset ADHD.
However, recent studies have identified individuals with ADHD in adulthood who have not …

Objective: We aimed to provide an overview of the Massachusetts General Hospital (MGH)
Longitudinal Studies of ADHD. Methods: We evaluated and followed samples of boys and …

Importance The requirement of a childhood onset has always been a key criterion for the
diagnosis of attention-deficit/hyperactivity disorder (ADHD) in adults, but recently this …

OBJECTIVE: To evaluate whether including children with onset of symptoms between ages
7 and 12 years in the ADHD diagnostic category would:(a) increase the prevalence of the …

Although historically conceptualized as a disorder that was limited to males during middle
childhood, ADHD is currently conceptualized as a chronic disorder that persists into …

Objective: The aim of the study was to evaluate associations between ADHD and comorbid
psychiatric disorders among adults from a population-based birth cohort. Method …

OBJECTIVE: To identify the psychosocial and clinical correlates of attention-deficit
hyperactivity disorder (ADHD) in a community sample of children and to examine the validity …

OBJECTIVE: To investigate correlates of internalizing and externalizing psychopathology in
a clinical sample of children with attention-deficit/hyperactivity disorder (ADHD). METHOD …

Background. Our objective was to estimate the lifetime prevalence of psychopathology in a
sample of youth with and without attention deficit hyperactivity disorder (ADHD) through …