Epidemiology

Question 1

Gender more likely to have inattentive type

Answer 1

Female

Question 2

Percentage of children with ADHD who have a comorbid anxiety disorder.

Answer 2

25-50% (March et al. 2000; Sciberras et al. 2014)

Question 3

Percentage of children with ADHD who have persistence of impairing symptoms in adulthood.

Answer 3

Up to 65% (Faraone, Biederman, Mick 2006, Psychol Med)

Question 4

Association of ADHD to obesity

Answer 4

Prevalence of obesity is 70% higher in adults with ADHD and 40% higher in children. Odds ratio is 1.47 using formal diagnosis of ADHD and measured height / weight. This does not establish causality. (Cortese et al 2016 Am J Psych)

Question 5

Effect of gender on association of ADHD to obesity

Answer 5

Some studies suggested obesity is more likely in female patients with ADHD but meta-analysis showed no such link (Cortese et al Am J Psych 2016)

Question 6

Comorbidity rate with ADHD

Answer 6

~70% of ADHD patients display at least one other comorbid disorder or specific neurological problem.

Question 7

Risk of developing schizophrenia in children and adolescents with ADHD compared to controls.

Answer 7

Increased; 4.3 times more likely.

Question 8

Persistence rate of ADHD at 10-year follow-up.

Answer 8

ADHD persists (syndromatic, symptomatic, or functional) in 78% of subjects at 10-year follow-up. (Biederman et al 2011)

Question 9

Is ADHD a culture-bound syndrome?

Answer 9

ADHD has been identified in every country and culture in which it has been studied.