Prevalence
3 to 9%
Age of onset
before 7
Core symptoms
inattention and hyperactivity/impulsivity
Requirement for diagnosis
Early vs. Late onset
chronicity vs. related to depression/anxiety
Life course
40-80% will continue to have ADHD through adolescence…36% through adulthood
Comorbid conditions
ODD/CD, depression, OCD
80% have another condition/60% have two conditions
-30-40% LD
Base rate in clinical settings
50% referred to child mental health settings have ADHD
Gender differences
9 boys to 1 girl ratio. Girls have less externalizing behaviors, but more internalizing and intellectual problems (masking effect on ADHD symptoms)
Situational and contextual factors
Impairments
Etiology
Mostly neurological 1. EF deficits 2. blood flow to prefrontal regions 3. less brain volume right frontal region 4. smaller cerebellum Genetics 1. family and twin studies (risk 40-57% 2. twin studies .70 to .97 degree of heritability (little to no effect of shared environment) Toxins - tobacco, lead, alcohol (small)
Outcomes
poor school performance, ODD and CD, Low intelligence/peer acceptance, emotional instability
Conceptualization of the disorder
Barkley’s behavioral inhibition (4 EFS)
Assessment Considerations
Parent ratings
The Conners’ Rating Scale - Revised demonstrates effective ADHD diagnostic utility, with sensitivity ranging between 92 and 100% and specificity ranging between 82 and 98%.[33] The Conners’ Rating Scales also include a self-report version which can be a useful addition to the assessment battery when the patient is an adolescent.
Minimum requirements for evaluation
Teacher Ratings
ADHD Checkup
Treatments
Common Classroom behaviors
2. attention
Worsens ADHD symptoms
Is ADHD a real disorder?
YES!
1. etiology
Meets Wakefield (1999) criteria
a. signficant deficits in inhibition and attention that are critical for self regulation
b numerous domains of inmpairment (risks of harm) over development
2. differ from normal population
What is the effectiveness of ADHD treatments?
Meds - 75-85%
behavioral techniques - 35-80%
MTA study concluded meds were superior; however,followup studies (Fabiano) found that after 36 months the differences subside.