Objective: To assess the prevalence of ADHD, mental health status, and risk factors in a
sample of Brazilian children. Method: Target sample consisted of all children from 5 to 13 …

OBJECTIVE: To evaluate the prevalence, comorbid conditions, and impairments of attention-
deficit/hyperactivity disorder (ADHD) among young adolescents in Porto Alegre, Brazil …

OBJECTIVE: To define the prevalence of attention-deficit/hyperactivity disorder (ADHD) in
children from four Brazilian public elementary schools. METHOD: Study population …

Objective: The object was to examine the prevalence of ADHD among preschoolers,
analyzing comorbidity, and the association with socio-demographic factors. Method: We …

Objective: We aimed to investigate the prevalence of ADHD and its comorbidities and some
associated demographic factors in a large sample population-based study. Method: As part …

Objective: To explore age-of-onset criterion for the diagnosis of attention–deficit hyperactivity
disorder (ADHD) in a school sample of young Brazilian adolescents. Methods: 191 students …

Objective: Few studies of ADHD prevalence have used population-based samples, multiple
informants, and Diagnostic and Statistical Manual of Mental Disorders (4th ed.; DSM-IV) …

Objective: The aim of this study was to compare the pattern of comorbidity in referred
samples of Attention-Deficit/Hyperactivity Disorder (ADHD) patients from two different …

Objective: To report the ADHD estimated prevalence in Spain, considering differences in
sex, age, presentation, and severity. Method: This study has a two-phase design and forms …

The objective of the study was to explore the agreement between parents' and adolescents'
reports for the diagnoses of DSM-IVAttention-Deficit/Hyperactivity Disorder (ADHD) in a …