Definition and etiology
Attention-deficit/hyperactivity disorder (ADHD) is the current diagnosis for what was previously labeled
minimal brain damage, minimal brain dysfunction, hyperkinetic impulse disorder, and
hyperactive child syndrome.
1
Contrary to popular belief, at least 60% of children with ADHD
continue to exhibit features of the disorder during adulthood. ADHD in
adults is associated with significant psychiatric morbidity and higher
than average rates of divorce, unemployment, substance abuse, and motor
vehicle accidents.
2
Poor adjustment and performance can have an erosive effect on
self-esteem, leading to clinically significant anxiety or depression, or
both, which are often the presenting features of adult ADHD in the
primary care setting.
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Prevalence and risk factors
ADHD is a neurobiologic disorder with strong genetic determinants.
Strict application of diagnostic criteria has been associated with a
mean prevalence of 5% to 7% across studies of children and adolescents.
3
Approximately 60% to 70% of affected children transition into
adulthood with some or all of the signs and symptoms of the disorder.
3
Family and genetic studies have shown ADHD to be the most heritable of psychiatric disorders.
4
Results from the National Comorbidity Survey Replication
estimated a 4.4% prevalence of current ADHD in the U.S. adult
population.
5
There was a high rate of psychiatric comorbidity in ADHD adults:
38% had a mood disorder, 47% had an anxiety disorder, 15% had a
substance-use disorder, and nearly 20% had an impulse-control disorder.
The odds of having both ADHD and another disorder were highest for drug
dependence (odds ratio [OR], 7.9), dysthymia (OR, 7.5), and bipolar
disorder (OR, 7.4).
5
Pathophysiology and natural history
A variety of neurochemical and neuroanatomic deficits have been associated with ADHD.
1,6,7
Studies employing structural neuroimaging point to an absence, in
persons with ADHD, of the frontal lobe asymmetry seen in normal
controls
1
; in control subjects (no ADHD), the right frontal lobe tends to
be larger than the left. Structural and functional neuroimaging studies
have demonstrated decreased function and size of the prefrontal cortex,
anterior cingulate, caudate nucleus, and cerebellar vermis in ADHD
children, and most (but not all) studies demonstrate this deficit on the
right.
6-8
Candidate gene selection is based on the hypothesis that deficient
dopamine availability contributes to ADHD. Genes studied include those
relevant to production of proteins involved in dopamine
synthesis (dopa decarboxylase, the enzyme responsible for conversion of l-dopa to dopamine),
inactivation (the dopamine and norepinephrine transporters), and
degradation (catechol-
O-methyltransferase) and in dopamine receptor activity (especially the dopamine D
4 receptor).
7
No one gene or its protein derivatives has been found to have a
consistent relation with ADHD, which suggests that like most psychiatric
disorders, ADHD is the consequence of polygenetic influences.
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Signs and symptoms
The manifestations of ADHD in adults are generally less obvious than
in children. Adults tend not to exhibit the impulsive, overactive
behavior distinctive of many ADHD children and adolescents.
1,2
Common dysfunctional behavioral patterns in adults with ADHD
include task avoidance, waiting until the last moment to complete a
task, completing all but the most important tasks, and taking on new
tasks before finishing others (
Table 1).
2
Impatience, irritability, and explosiveness are common as well.
Common comorbidities complicate the array of signs and symptoms that
ADHD adults can present with. Abnormal mood, vocational and
interpersonal problems, and substance abuse are often the problems that
patients present with when the underlying primary diagnosis is ADHD.
Table 1: Common Dysfunctional Behavior Patterns in Adults with ADHD
Behavior |
Description |
Short-Term Gain and Long-Term Loss |
Anticipatory avoidance |
Magnifying the difficulty of a pending task and doubts about being able to complete it |
Defers short-term stress but often creates a self-fulfilling
prophecy because the task looms ahead and can seem overwhelming when
facing a deadline |
| Results in rationalizations to justify procrastination |
|
Brinkmanship |
Waiting until the last moment (e.g., the night before) to complete a task, often when facing an impending deadline |
Deadline-associated stress can be focusing, but this tactic leaves little room for error and can yield a substantial result |
Pseudoefficiency |
Completing several low-priority, manageable tasks (e.g., checking
e-mail) but avoiding high-priority tasks (e.g., a project for work) |
Creates sense of productivity by reducing items on a to-do list but defers a more difficult project |
Juggling |
Taking on new, exciting projects and feeling busy without completing projects already started |
It is easier to become motivated to start a novel project than to complete an ongoing one |
|
| Pattern usually results in several incomplete projects |
ADHD, attention-deficit/hyperactivity disorder.
Adapted
with permission from Rostain AL, Ramsay JL: Adults with ADHD? Try
medication and psychotherapy. Curr Psychiatry 2006;5:13-27.
Diagnosis
Diagnostic criteria have been developed for children and adolescents (
Box 1)
9
but not specifically for adults. Despite having clinically
significant ADHD, many adults do not fulfill the threshold of six or
more criteria defined for children and adolescents. This points to the
fundamental problem of employing a descriptive nosology to define
clinical disorders. Future editions of the
Diagnostic and Statistical Manual of Mental Disorders
(DSM) will struggle with this dilemma until the pathophysiologic
mechanisms of specific psychiatric disorders such as ADHD are better
understood.
Box 1: Diagnostic Criteria for Attention-Deficit/Hyperactivity Disorder
|
Diagnostic Criteria |
- Meets symptom criteria
- Some inattention or hyperactivity-impulse symptoms causing impairment are present before age 7 years
- Some impairment from symptoms present in two or more settings (e.g., home, school or work, social)
- Clear evidence of clinically significant impairment in social, academic, or occupational functioning
|
Symptom Criteria |
At least six symptoms of inattention or at least six symptoms of
hyperactivity or impulsivity have persisted for at least 6 months and
occur often enough to be maladaptive and inconsistent with developmental
level. |
Inattention |
- Fails to pay close attention to details or makes careless mistakes in schoolwork, work, or other activities
- Has difficulty sustaining attention in tasks or play activities
- Does not seem to listen when spoken to directly
- Does not follow through on instructions and fails to finish
schoolwork, chores, or work duties (not due to oppositional behavior or
failure to understand)
- Has difficulty organizing tasks and activities
- Avoids, dislikes, or is reluctant to engage in tasks requiring mental effort (e.g., schoolwork, homework)
- Loses things necessary for tasks or activities (e.g., written instructions, school assignments, textbooks, pencils, tools, toys)
- Is easily distracted by extraneous stimuli
- Is forgetful in daily activities
|
Hyperactivity |
- Fidgets with hands or feet and squirms in seat
- Leaves seat in classroom or other situations where remaining seated is expected
- Runs about or climbs excessively in situations where these
activities are considered inappropriate; in adolescents or adults, this
feature may be limited to subjective feelings of restlessness
- Has difficulty in playing or engaging in leisure activities quietly
- Is on the go or acts as if driven by a motor
- Talks excessively
|
Impulsivity |
- Blurts out answers before questions are completed
- Has difficulty awaiting turn (impatient)
- Interrupts or intrudes on others (e.g., butts in on conversations, games)
|
Exclusion Criteria |
- Symptoms do not occur exclusively during course of a pervasive developmental disorder, schizophrenia, or psychotic disorder.
- Symptoms are not better accounted for by another mental disorder
(e.g., mood disorder, anxiety disorder, dissociative disorder,
personality disorder).
|
Situational Notes |
- Symptoms might not be observable when the patient is in highly
structured or novel settings, engages in interesting activity, receives
one-on-one attention or supervision, or is in a situation with frequent
rewards for appropriate behavior.
- Symptoms typically worsen in situations that are unstructured,
minimally supervised, or boring or that require sustained attention or
mental effort.
- In adolescents (or adults), symptoms include restlessness
(rather than hyperactivity, as seen in children), impaired academic
performance, low self esteem, poor peer relations, and erratic work
record.
|
Adapted from American Psychiatric Association:
Diagnostic and Statistical Manual of Mental Disorders, 4th ed, text
rev. Washington, DC: American Psychiatric Association, 2000.
Figure 1
is an algorithm for diagnosing ADHD in the adult patient. The core
criteria for the diagnosis of adult ADHD is the evidence of the disorder
during childhood, symptom persistence, and functional impairment.
3
Determining whether the patient fulfilled these criteria depends
almost exclusively on the patient's knowledge of his or her childhood
behavior and school performance. Most adults with ADHD recall some
evidence of problems related to either inattention or hyperactivity
during childhood. Trouble sitting still, frequent fighting, temper
outbursts, tendency to daydream, or suboptimal school performance is
typical. Those with clinically significant ADHD who report successful
school performance may have compensated with higher-than-average
intellectual strengths, had an insufficiently challenging curriculum, or
simply do not remember accurately. School performance records or
collateral information from parents can be very helpful. Published
questionnaires can be used to capture the necessary information and can
assist with (but not confirm) the diagnosis (
Box 2). Ultimately, however, the clinician must rely on the patient's veracity and accuracy of recall.
Box 2: Rating Scales Used in Diagnosing Attention-Deficit/Hyperactivity Disorder
|
Adult ADHD Self-Report Scale (AASRS) Symptom Checklist
|
Barkley ADHD Behavior Checklist for Adults
- In Barkley RA (ed): Attention-Deficit Hyperactivity Disorder: A
Handbook for Diagnosis and Treatment, 3rd ed. New York, Guilford Press,
2006.
|
Conners’ Adult ADHD Rating Scales (CAARS)
|
Wender-Utah Rating Scale (WURS)
|
ADHD, attention-deficit/hyperactivity disorder.
There is no diagnostic laboratory test for ADHD. Neuropsychological
testing can be used to determine whether or not a learning disability is
present (e.g., dyslexia), but it cannot confirm the diagnosis of ADHD
(by definition, not a learning disability). Although neuroimaging and
genetic testing offer attractive diagnostic potential, they are not
sufficiently specific or sensitive for routine clinical use.
The difficulty of diagnosing ADHD in adults results largely from the
nonspecificity of this behavior-symptom complex. Compounding the lack of
specificity, many adults with long-standing undiagnosed and untreated
ADHD develop secondary mood, anxiety, or substance-use disorders, alone
or in combination, that become the focus of clinical attention and
obscure detection of the more fundamental problem with attention. The
National Comorbidity Survey Replication showed that many adults with
ADHD are receiving treatment for other comorbid mental or substance-use
disorders but not for ADHD.
5
Differential diagnosis
Virtually any type of distress, regardless of the cause, can
interfere with normal attention. Therefore, the feature that
distinguishes ADHD from other causes of inattention is a lifelong
pattern of the behavior-symptom complex. When this criterion is not met,
other diagnoses must be considered (
Table 2). Adults with ADHD are at greater risk for having or developing mood, anxiety, and substance-use disorders.
5
Accurate diagnosis of these disorders and determining whether
they are comorbid or secondary to ADHD have important implications for
treatment selection and prognosis. Successful treatment of a comorbid
disorder reduces symptom burden, but it does not affect the symptoms and
behavior of ADHD. On the other hand, successful treatment of ADHD can
result in improvement of secondary anxiety, depression, or substance
abuse. Certain disorders that are commonly associated with or have
features that can mimic ADHD are listed in
Table 2.
Table 2: Differential Diagnosis of Attention-Deficit/Hyperactivity Disorder
Diagnosis |
DSM IV-TR |
Feature(s) Shared with ADHD |
Mood Disorders
|
|
|
Major depression |
296.2-3 |
Trouble concentrating; trouble initiating and completing tasks |
Dysthymia |
300.4 |
Trouble concentrating; trouble initiating and completing tasks |
Depression NOS |
311 |
Trouble concentrating; trouble initiating and completing tasks |
Bipolar disorder |
296.4-6 |
Distractability, hyperactive behavior |
Cyclothymia |
| Distractability, hyperactive behavior |
Anxiety Disorders
|
|
|
Generalized anxiety disorder |
300.02 |
Inattention, distractability |
Social anxiety disorder |
300.23 |
Performance anxiety, task avoidance (especially tasks performed in front of others), unsatisfying social interaction |
Obsessive-compulsive disorder |
300.3 |
Repetitious activity |
Anxiety disorder NOS |
300.00 |
Inattention, distractability |
Substance-Use Disorders
|
|
Nicotine dependence |
305.10 |
Poor job performance and socialization |
|
| Commonly comorbid with ADHD |
Alcohol abuse or dependence |
305.0/303.90 |
Poor job performance and socialization |
|
| Commonly comorbid with ADHD |
Cannabis abuse or dependence |
305.20/304.30 |
Poor job performance and socialization |
|
| Commonly comorbid with ADHD |
Impulse-Control Disorders
|
|
Intermittent explosive disorder |
312.34 |
Impulsivity, aggression |
Impulse control disorder NOS |
312.30 |
Impulsivity, trouble with task completion |
Learning Disorders
|
|
|
Learning disorder NOS |
315.9 |
History of poor school and job performance |
Early onset dementia |
290.10 |
Poor attention, forgetfulness |
Mild MR |
317 |
Trouble with learning, reading, attention |
Personality Disorders
|
|
|
Borderline personality disorder |
301.83 |
Impulsivity, aggression |
Antisocial personality disorder |
301.7 |
Impulsivity, aggression, history of poor school and job performance |
ADHD, attention-deficit/hyperactivity
disorder; DSM IV-TR, Diagnostic and Statistical Manual of Mental
Disorders, 4th edition, text revision; MR, mental retardation; NOS, not
otherwise specified.
Treatment
Figure 2
is a management algorithm. Optimal treatment of adult ADHD invariably
requires pharmacotherapy. Adding life-skills coaching or
cognitive-behavioral therapy, or both, in either individual or group
settings can further improve outcome, but by themselves they are
generally insufficient. Partners and family members can benefit from
better understanding of the impact of ADHD on the patient's behavior and
interpersonal style.
2
Baseline measures of weight, heart rate, and blood pressure should be
obtained before starting stimulant or nonstimulant medication. The
patient with a history of cardiovascular abnormalities, in particular
structural heart disease (e.g., idiopathic hypertrophic subaortic
stenosis) should avoid stimulant medication in favor of a nonstimulant
agent such as atomoxetine, bupropion, or modafanil. Treatment of such
patients should involve close collaboration with an internist or
cardiologist.
Medications
The standard of care for adults has evolved largely from studies in
children, and the medications used in adults are the same as those used
in children and adolescents with ADHD (
Table 3).
Table 3: Medications for Attention-Deficit/Hyperactivity Disorder
Drug |
Trade Name |
Dosage Form (mg) |
Dose* (mg) |
Duration (h) |
Frequency |
Comments |
CNS Stimulants
|
Dexmethylphenidate |
Focalin |
2.5, 5, 10 |
5-20 |
3-6 |
tid-qid |
Dextroisomer of methylphenidate |
|
|
|
|
|
| Start at 50% of current daily dose to convert from methylphenidate |
| Focalin XR |
2.5, 5, 10 |
10-20 |
8-10 |
qd-bid |
Dextroisomer of methylphenidate |
|
|
|
|
|
| Start at 50% of current daily dose to convert from methylphenidate |
Dextroamphetamine |
Dexedrine |
5 |
10-30 |
3-6 |
bid-tid |
|
| Dexedrine spansule |
5, 10, 15 |
10-30 |
6-8 |
qd-bid |
Dexedrine spansule |
Methylphenidate |
Concerta |
18, 27, 36, 54 |
18-54 |
10-12 |
qd |
The FDA-approved max dosage in children and adolescents is 54 mg qd,
but doses of 108 mg qd have been used successfully in children and
adults |
| Metadate ER†
|
10, 20 |
20-60 |
6-8 |
qd-bid |
|
| Metadate CD |
10, 20, 30, 40, 50, 60 |
| 8-10 |
qd-bid |
|
| Methylin |
5, 10, 20 |
15-45 |
3-6 |
tid-qid |
|
|
| 5/5 mL, 10/5 mL solution |
|
|
|
|
| Methylin ER†
|
|
| 6-8 |
qd-bid |
|
| Ritalin |
5, 10, 20 |
10-40 |
3-6 |
tid-qid |
|
| Ritalin SR |
20 |
| 6-8 |
qd-bid |
|
| Ritalin LA |
20, 30, 40 |
| 6-8 |
qd-bid |
Lasts longer than SR |
Mixed-amphetamine salts |
Adderall |
5, 7.5, 10, 12.5, 15, 20, 30 |
| 6-8 |
qd-bid |
|
| Adderall XR |
5, 10, 15, 20, 25, 30 |
20-60 |
8-10 |
qd-bid |
|
| Vyvanse |
30, 50, 70 |
30-100 |
12 |
qd-bid |
Pro-drug |
Selective Norepinephrine Reuptake Inhibitor
|
|
|
|
|
Atomoxetine |
Strattera |
10, 18, 25, 40, 60 |
40-100 |
24 |
qd-bid |
Better than placebo, but not as effective as CNS stimulants in controlled trials for ADHD |
Alternative Medications
‡
|
|
|
|
|
|
Bupropion |
Wellbutrin |
75, 100 |
150-450 |
24 |
tid |
|
| Wellbutrin SR |
100, 150, 200 |
150-450 |
24 |
bid |
|
| Wellbutrin XL |
150, 300 |
150-450 |
24 |
qd |
|
Desipramine |
Norpramin |
10, 25, 50, 75, 100, 150 |
100-200 |
24 |
qd |
|
Modafinil |
Provigil |
100, 200 |
100-400 |
| qd |
|
ADHD, attention-deficit/hyperactivity disorder; CNS, central nervous system; FDA, U.S. Food and Drug Administration.
*The last dose is the FDA-approved maximum daily dosage in children.
†There is no obvious difference between these two products in terms of dosage, duration, and efficacy.
‡These agents may be effective in some instances of ADHD but
have not been shown in controlled trials to be more effective than
placebo. They are not approved by the FDA for treating ADHD.
Central nervous system (CNS) stimulants such as dextroamphetamine,
methyphenidate, and dexmethylphenidate are the drugs of choice for ADHD
in both children and adults. Their therapeutic effect is associated with
enhancement of central dopaminergic and noradrenergic activity.
1
CNS stimulant compounds augment synaptic catecholamine
concentrations by triggering presynaptic release of dopamine (and to a
lesser extent norepinephrine) and also by blocking their reuptake.
7
Drugs that influence both dopaminergic and noradrenergic function
(e.g., dextroamphetamine, methylphenidate, dexmethylphenidate) are
stimulants, and those that have less or no impact on dopamine and more on norepinephrine are
nonstimulants,
such as atomoxetine (Strattera). Other nonstimulant agents whose
mechanism of action in ADHD is not fully understood include bupropion
and imipramine.
Dose
The dosage of medication must be individualized by increasing
gradually to maximal benefit while avoiding side effects. These
principles hold for both stimulant and nonstimulant drugs. Clinical
experience suggests a fine line between too little and too much
medication.
Onset of Effect
Stimulant drugs have a rapid onset of effect. Clinical effects are
felt within 15 to 30 minutes of oral administration, and peak blood
levels are achieved within approximately 2 hours. It can take a week or
more, however, to achieve full therapeutic effect. Assessing the
patient's response to medication must account for exposure to
circumstances that affect attention (e.g., comorbid disorders,
environmental stress) and how effectively the patient monitors his or
her response to medication. The nonstimulants work more gradually and
can take days to weeks to achieve a full therapeutic effect.
The stimulants come in immediate-release and sustained-release forms (see
Table 3).
Immediate-release forms last anywhere from 2 to 6 hours, necessitating 2
to 4 doses daily. Sustained-release forms last 8 to 12 hours,
permitting once- or twice-daily dosing.
Side Effects
Stimulant side effects are typically dose related and include nausea,
headache, jitteriness, tics, high blood pressure, and high heart rate.
They also have potential for abuse. Patients with baseline
tachyarrhythmia, hypertension, or structural heart disease are at high
risk for stimulant-induced aggravation of these abnormalities. The
nonstimulant atomoxetine can cause increases in heart rate and blood
pressure, but it is far less likely to do so than stimulants are. Its
most common side effects include dry mouth, nausea, and sexual
difficulties. Nonstimulants have no abuse potential.
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Prevention and screening
It is reasonable to expect that timely and effective treatment should
reduce the risk of psychosocial morbidity associated with ADHD. A small
but growing body of evidence suggests that patients with ADHD who are
treated for it have less substance abuse, better work and academic
performance, and better outcomes in general than those who are not
treated.
10
If the extensive psychosocial morbidity of ADHD can be prevented,
then it stands to reason that it should be identified and treated as
early as possible. In fact, many adults go through life without
recognizing they have ADHD. This, as well as the complex comorbidities
(e.g., depression, anxiety, substance abuse) that often trigger a
request for help, make it difficult to detect ADHD.
Three validated patient self-report instruments are available to
screen for ADHD in adults; alternatively, they can be used to
substantiate a physician's clinical impression. The World Health
Organization (WHO) Adult Self-Report Screener (ASRS) for Adult Attention
Deficit Disorder (ADD) includes six questions rated on a scale from 0
to 4 (0 = never, 1 = rarely, 2 = sometimes, 3 = often, 4 = very often).
The maximum score is 24; the higher the score, the more likely that ADHD
is present. The Wender Utah Rating Scale (WURS) was originally used as a
research instrument and validated as a screener subsequently. A score
of 46 or more obtained from adding the ratings on items 3-7, 9-12,
15-17, 20, 21, 24-29, 40, 41, 51, 56, and 59 is highly predictive of a
diagnosis of ADHD. The Conner Adult ADHD Rating Scales (CAARS) elicit
self reports and observer ratings. Further information about these
scales and their acquisition is available in
Box 2.
Special populations
Geriatric Patients
There is no age limit for the diagnosis of ADHD. Geriatric-age
patients with a diagnosis of ADHD can benefit considerably from
appropriate treatment. Older patients are more likely, however, to have
coexisting cardiovascular abnormalities that warrant careful monitoring
during treatment with stimulant medication.
Potential Substance Abusers
The challenge for the prescribing physician is to keep stimulant
medications out of the hands of persons prone to drug or alcohol
addiction. The risk of stimulant-induced substance abuse in
uncomplicated adult ADHD is minimal. This risk liability is further
reduced by the use of long-acting agents (see
Table 3).
Effective treatment of ADHD should reduce the risk of substance abuse,
especially when substance abuse is secondary to ADHD. For persons with
ADHD and comorbid substance abuse or dependence, the treatment of choice
includes a nonstimulant agent such as atomoxetine, buproprion, or
imipramine. A blanket policy of refusal to prescribe CNS stimulants to
patients with a history of drug abuse, however, is ill advised. In all
cases, substance abuse must be stabilized first, and ADHD treatment can
be initiated as soon as the substance abuse is stabilized.
Patients with Cardiovascular Disease
CNS stimulant medications are relatively contraindicated in patients
with hypertension, cardiac arrhythmia, tachycardia, coronary artery
disease, and structural heart disease (e.g., idiopathic hypertrophic
subaortic stenosis). Nonpharmacologic therapies or nonstimulant
medications should be tried first in such patients. If these are
ineffective, however, and the fully informed patient desires a trial of
stimulant medication, it should be prescribed with careful monitoring in
conjunction with the supervision of a cardiologist or internist to
minimize the risk of adverse outcome.
Epileptic Patients
CNS stimulants do not cause a clinically significant reduction in
seizure threshold and therefore can be used safely in patients with
epilepsy.
Pregnant Women
All CNS stimulant drugs are listed as class C and should therefore be avoided if possible during pregnancy.
Summary
- Adult attention-deficit/hyperactivity disorder (ADHD) is a familial disorder with first manifestations before age 7 years.
- At least 60% of children with ADHD continue to exhibit clinically significant features of the disorder as adults.
- ADHD is among the most heritable of psychiatric disorders.
- Undiagnosed or untreated ADHD is associated with significant
morbidity, including higher-than-expected rates of maladaptive behavior,
family problems including divorce, problematic employment, substance
abuse, motor vehicle accidents, and secondary mood and anxiety
disorders.
- The primary treatment for adult ADHD is a methylphenidate- or
amphetamine-based compound supplemented when necessary with structured,
skills-based cognitive-behavioral therapy.
Back to Top
References
- Barkley RA. Attention-Deficit Hyperactivity Disorder: A
Handbook for Diagnosis and Treatment. 2nd ed. New York: Guilford Press,
1998, pp 3-55.
- Rostain AL, Ramsay JL. Adults with ADHD? Try medication and psychotherapy. Curr Psychiatry. 2006, 5: 13-27.
- McGough JJ, Barkley RA. Diagnostic controversies in adult
attention deficit hyperactivity disorder. Am J Psychiatry. 2004, 161:
1948-1956.
- Hudziak JJ, Derks EM, Althoff RR, et al: The genetic and
environmental contributions to attention deficit hyperactivity disorder
as measured by the Conners' Rating Scales—Revised. Am J Psychiatry.
2005, 162: 1614-1620.
- Kessler RC, Adler L, Barkley R, et al: The prevalence and
correlates of adult ADHD in the United States: Results from the national
comorbidity survey replication. Am J Psychiatry. 2006, 163: 716-723.
- Vaidya CJ, Bunge SA, Dudukovic NM, et al: Altered neural
substrates of cognitive control in childhood ADHD: Evidence from
functional magnetic resonance imaging. Am J Psychiatry. 2005, 162:
1605-1613.
- Pliszka SR. Neuroscience for the Mental Health Clinician. New York: Guilford Press, 2003, pp 147-150.
- Biederman J, Safren SA, Seidman LJ, et al: ADHD: Applying
practice guidelines to improve patient outcome and executive function. J
Clin Psychiatry. 2006, 67: 2014-2025.
- American Psychiatric Association. Diagnostic and
Statistical Manual of Mental Disorders. 4th ed, text rev. Washington,
DC: American Psychiatric Association, 2000.
- Lamberg L. ADHD often undiagnosed in adults. Appropriate
treatment may benefit work family social life. JAMA. 2003, 290:
1565-1597.
Back to Top
Suggested Readings
- American Psychiatric Association. Diagnostic and
Statistical Manual of Mental Disorders. 4th ed. Washington, DC:
American Psychiatric Association, 2000.
- Barkley RA. Attention-Deficit Hyperactivity Disorder: A
Handbook for Diagnosis and Treatment. 2nd ed. New York: Guilford Press,
1998, pp 3-55.
- Biederman J, Safren SA, Seidman LJ, et al: ADHD: Applying
practice guidelines to improve patient outcome and executive function.
J Clin Psychiatry. 2006, 67: 2014-2025.
- Hudziak JJ, Derks EM, Althoff RR, et al: The genetic and
environmental contributions to attention deficit hyperactivity disorder
as measured by the Conners' Rating Scales-Revised. Am J Psychiatry.
2005, 162: 1614-1620.
- Kessler RC, Adler L, Barkley R, et al: The prevalence and
correlates of adult ADHD in the United States: Results from the
national comorbidity survey replication. Am J Psychiatry. 2006, 163:
716-723.
- Lamberg L. ADHD often undiagnosed in adults. Appropriate
treatment may benefit work family social life. JAMA. 2003, 290:
1565-1597.
- McGough JJ, Barkley RA. Diagnostic controversies in
adult attention deficit hyperactivity disorder. Am J Psychiatry. 2004,
161: 1948-1956.
- Pliszka SR. Neuroscience for the Mental Health Clinician. New York: Guilford Press, 2003, pp 147-150.
- Rostain AL, Ramsay JL. Adults with ADHD? Try medication and psychotherapy. Curr Psychiatry. 2006, 5: 13-27.
- Vaidya CJ, Bunge SA, Dudukovic NM, et al: Altered neural
substrates of cognitive control in childhood ADHD: Evidence from
functional magnetic resonance imaging. Am J Psychiatry. 2005, 162:
1605-1613.