disruptive behaviour disorders donna dowling child & adolescent psychiatrist townsville cayas
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Disruptive Behaviour Disruptive Behaviour DisordersDisorders
Disruptive Behaviour Disruptive Behaviour DisordersDisorders
Donna DowlingDonna Dowling
Child & Adolescent PsychiatristChild & Adolescent Psychiatrist
Townsville CAYASTownsville CAYAS
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•ADHD (= ADD)•Oppositional Defiant Disorder
•Conduct Disorder
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EpidemiologyEpidemiologyEpidemiologyEpidemiology
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Epidemiology• Around 3-5% of schoolchildren display
ADHD, as many as 90% of them boys• Worldwide studies consistent – not just
western disease
• Many children show a lessening of symptoms as they move into adolescence– At least half continue to have problems– One-third of those affected have symptoms into
adulthood
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AetiologyAetiologyAetiologyAetiology
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Aetiology• Heritability is the strongest factor in
development of ADHD• Risk factors account for only a small
portion of variance
• Pregnancy variables: young maternal age, maternal use of tobacco and alcohol, toxaemia, post-maturity and extended labour
• Medical factors: fragile X syndrome, G6PD deficiency, phenylketonuria, brain trauma, lead poisoning, malnutrition
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Main Neurotransmitters in ADHD
• Dopamine• Noradrenaline
To regulate the inhibitory influences in the frontal-cortical processing of information
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Dopamine
- enhances signals - improves:
. attention, . focus vigilance, . acquisition, . on-task behaviour and cognition
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Noradrenaline• dampen « noise »
• decrease distractibility and shifting
• improve executive operations
• increase behavioural, cognitive, motoric inhibition
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Aetiology• ADHD symptoms and a diagnosis of ADHD
may themselves create interpersonal problems and produce additional symptoms in the child
• Some children sensitive to colourings/preservatives – not sugar per se
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Diagnosing ADHDDiagnosing ADHDDiagnosing ADHDDiagnosing ADHD
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Inattention symptoms• Fails to give close attention; careless mistakes• Difficulty sustaining attention in tasks or play activities =
requires frequent redirection• Does not seem to listen when spoken to directly• Does not follow through on instructions; fails to finish
task (not oppositional or failure to understand• Difficulty organizing tasks = homework poorly organized• Dislikes sustained mental effort = schoolwork; homework• Loses possessions• Easily distracted• Forgetful
DaydreamsCan be very quiet & missed
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Hyperactivity• Fidgets; squirms• Leaves seat when expected to sit• Runs or climbs excessively• Difficulty in playing quietly• Often "on the go" or acts as if "driven by a motor"• Often talks excessively
Perceived « immature »Accidents/injuries prone
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Impulsivity
• blurts out answers before questions completed
• difficulty waiting turn• interrupts or intrudes on others
Impatient Rushing into things Risk taking; Taking dares
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DSM IV CriteriaA:• 6 / 9 inattention
&/or • 6 / 9 hyperactivity & impulsivity= 6 months; maladaptive & inconsistent with development level
B: symptoms before age of 7C: impairment in 2 settingsD: clinically significant – social/academicE: not better explained by something else
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Assessment• History – parents or caregivers,
as well as a classroom teacher or other school professional
• Interview of child
• Parent and teacher ratings of ADHD-related behaviours
• Investigations - No clinical examination or lab tests are accepted as either “rule in” or “rule out.” Recommend vision & hearing tested
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Assessment• RATING SCALES
- Not diagnostic – screening test- Monitor response to interventions
• PSYCHOMETRICS - WISC/WIAT
- CPT - TEA-Ch
• Others as indicated- Speech & language Occupational therapy
Auditory processing•
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Differential DiagnosisDifferential DiagnosisDifferential DiagnosisDifferential Diagnosis
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Differential Diagnosis
• Hearing Loss• Auditory
processing• Learning Disability• Epilepsy• CNS abnormality• Metabolic
• Tourette’s syndrome
• Tics• Sleep apnoea• Lead poisoning• Hyperthyroidism• Pin worms• Autism
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Differential Diagnosis
• Emotional distress
• PTSD• Oppositional
Defiant Disorder
• Conduct Disorder
• Bipolar Disorder
• Anxiety Disorder
• Substance Abuse
• Depression
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LD VS. ADHD• Lacks early childhood history of hyperactivity
• “ADHD” behaviours arise in middle childhood
• “ADHD” behaviours appear to be task- or subject-specific
• Not socially aggressive or disruptive
• Not impulsive or disinhibited
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ADHD VS. ANXIETY DISORDERS
• Not overly concerned with competence• Not anxious or nervous• Exhibit little or no fear• Have no difficulty separating from parents• Infrequently experience nightmares• Inconsistent performance• Not concerned with future• Are not socially withdrawn• May be aggressive• May be able to pay attention if work is stimulating
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DEPRESSION VS. ADHD
• Not usually as active• Marked changes in affect/mood• Concentration problems have acute
onset possibly following stress event• Changes in eating and sleeping habits• Loss of interest or pleasure in most
activities
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ODD/CD VS. ADHD
• Lacks impulsive, disinhibited behaviour
• Able to complete tasks requested by others
• Resists initiating response to demands
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ODD/CD VS. ADHD• Lacks poor sustained attention
and marked restlessness• Often associated with parental
child management deficits or family dysfunction
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“Child abuse victims are at increased risk of a variety of child
and adolescent psychiatric diagnoses, including depression, anxiety, conduct disorders, ODD,
ADHD and substance abuse.”
Kaplan et al Oct 1999
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ComorbidityComorbidityComorbidityComorbidity
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ComorbidityO.C.D.
O.D.D.
C.D.
‘Dyslexia’
Tics/ Tourettes
Anxiety/Depression
Speech & Language
‘Dyspraxia’
Substance Abuse
A.D.H.D. Bipolar Disorder
Asperger’s Syndrome
Sleep Disorders
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As many as one-third of children diagnosed with ADHD also have a co-
existing condition.
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Comorbidity
NEURO- DEVELOPMENTAL• learning disorders• language disorders• cognitive impairment• functionally significant ‘soft’
neurological features
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ComorbidityEMOTIONAL-BEHAVIORAL• lowered self esteem• downward cycle• school failure• substance abuse• antisocial behaviour• violence
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ComorbidityConduct problems (e.g., oppositional behaviour,
lying, stealing, and fighting)
Mood or anxiety problems
Academic underachievementSpecific learning disabilitiesPeer relationship problems
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ImpactImpactImpactImpact
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ImpactEmotional• Low self esteem• Impaired self-regulation• Relationship difficulties
Cognitive• Organizing; planning and time management• Learning delay• Short term memory problems; lack of focus • Language/speech
Physical• Fine & gross motor skill delay
Behaviour• Impaired self-regulation
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Impact• Pervasiveness of symptoms• Persistence of symptoms• Associated problems:
– Aggression– Psychosocial dysfunction: peers, family– Poor academic achievement– Drug or alcohol use– Criminal activity
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Impact
• Good family support• Higher intelligence• Good peer relationships• Positive temperament, nonaggressive• Emotional health, positive self-esteem• Socio-economic factors• Diminution or resolution of symptoms
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Impact
• 32-40% of students with ADHD drop out of school• Only 5-10% will complete college• 50-70% have few or no friends• 70-80% will under-perform at work• 40-50% will engage in antisocial activities• More likely to experience teen pregnancy &
sexually transmitted diseases• Have more accidents & speed excessively• Experience depression & personality disorders (Barkley, 2002)
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School difficulties & ADHD• High rates of disruptive behaviour• Low rates of engagement with
academic instruction and materials• Inconsistent completion and accuracy
on schoolwork• Poor performance on homework, tests,
& long-term assignments• Difficulties getting along with peers &
teachers
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Life Impairments• Childhood
– Academic and social issues
• Adolescence– Substance abuse, driving accidents– Teen pregnancies, don’t finish school
• Young Adults– Poor job stability, disrupted marriages– Financial difficulties, impulsive crimes
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ManagementManagementManagementManagement
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Psychological Psychiatric Educational
Other individually determined strategies
MedicalDietary
Coaching
Behavioural & parent training programmes
Multidisciplinary Management of
ADHD
Substance abuse
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Management
• Psychoeducational – Family; School
• Environmental– dietary modifications– parenting
• Academic skills training• Psychological
– Cognitive; Behavioural
• Medication
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Non-Pharmacological Management
– Family Therapy may be required for reasons such as: difficulty raising & managing a child with ADHD and new roles for individuals within the family.
– ADHD in parents may impact success of parent training and family therapy
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Non-Pharmacological Management
Diet• Elimination diets – difficult• Omega 3 – at least 1000mg/day for a month
Academic skills training: focus on following directions, becoming organized, using time effectively, checking work, taking notes
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Non-Pharmacological Management
Behavioural therapy- Does not reduce symptoms– May improve social skills and compliance– Does not lead to maintenance of gains or
improvement over time after the therapy is completed
Social skills group - Uses modelling, practice, feedback and
contingent reinforcement to address the social deficits common in children with ADHD
- Useful for the secondary effects of ADHD, such as low self-esteem, but not helpful for core symptoms of ADHD
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MEDICATIONS FOR ADHDStimulant Medications
–Methylphenidate (Ritalin, Ritalin LA, Concerta)
–DexamphetamineNon-stimulant
Atomoxetine (Strattera)Other
Clonidine (Catapres)Risperidone (Risperdal)
•
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MEDICATIONS FOR ADHDTricyclic Antidepressants –Desipramine ;Imipramine (Tofranil)
Other Antidepressants–Bupropion (Zyban); Fluoxetine (Prozac)
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Stimulants
• Used to treat ADHD since 1960’s• 200 placebo controlled studies over 40
years • Best studied and most frequently
prescribed• Precise mechanism of action not known
– Blockade of pre-synaptic dopamine transporter
• Beneficial effects seen almost immediately
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Stimulants
Methylphenidate: Ritalin 10mg (3-4 hours) Ritalin LA 20/30/40 mg (6-8 hours) Concerta 18/36/54 mg(10-12
hours)
Amphetamine: Dexamphetamine 10 mg (3-4
hours)
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Stimulants Specific Effects
• Improved sustained attention• Reduced distractibility• Improved short-term memory• Reduced impulsivity• Reduced motor activity• Decreased excessive talking• Reduced bossiness and
aggression with peers
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Stimulants Specific Effects
• Increased amount & accuracy of academic work completed
• Decreased disruptive behaviour• Improved handwriting and fine motor control• Reduced off-task behaviour in classroom• Improved ability to work and play
independently as many as 75% of kids on these medications show improvement
• also seems to cause improvement in kids without ADHD in terms of attention and classroom behaviour
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Stimulants
• Not the only treatment needed, but effective in 75-90% of ADHD cases (7 through adult years).
• Side effects few, rarely serious, usually manageable.
• Response to stimulants is NOT diagnostic of ADHD
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Stimulants
– Effective during school and homework-time– Out of the system by bedtime– May use Monday to Friday or 7 days /week– Weekend use if significant behavioural
comorbidity or needed for weekend activity:
– Theoretical: could worsen epilepsy– Not addictive– Use does not predispose to subsequent
substance abuse – ‘protective’
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SIDE EFFECTS OF STIMULANTS InsomniaDecreased Appetite (in 50-60%)
=>Weight Loss 1-2 cm shorter by end of growthHeadachesStomach aches (20-40%)Mood lability/dysphoria Prone to Crying (10%) ‘sensitive’
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SIDE EFFECTS OF STIMULANTSNervous Mannerisms (10%)Tics (<5%) and Tourette’s (Very Rare) -
possible exacerbation or uncovering of tics
Over focused behaviour; Cognitive toxicity
(Mild) Increases in Heart Rate and Blood Pressure
- NO INCREASE IN SUDDEN DEATH
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Atomoxetine (Strattera)
• Potent pre-synaptic, noradrenergic transport blocker with low affinity for other neurotransmitters
• Structurally similar to Fluoxetine• Metabolized by CYP 2D6 system• Half-life = 4-5 hours• Optimal effects seen at 2 weeks
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Atomoxetine (Strattera)
• May be given as single daily dose or bd
• Dispensed in a capsule that cannot be opened
• Superior to placebo, but no good data comparing efficacy to stimulants yet exists
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Atomoxetine - Indications• Severe side effects to
Methylphenidate/Dexamphetamine – weight loss; insomnia
• If comorbidity – anxiety & mood disorders; tics; substance abuse
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Atomoxetine (Strattera)
• Adverse effects ~ 5%– Sedation– Nausea and vomiting– Decreased appetite– Modest increase in pulse and blood
pressure– Irritability, mood swings– Fatigue– Urinary hesitancy/prostatism (3%)– Suicidal ideation
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Atomoxetine (Strattera)• Suicidal Ideation – black box
warning
2200 in study; 1300 on Strattera5 reported suicidal thoughtsNo deaths
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Treatment Implications
• More formulations now exist, use of which involves “the art of medicine.”
• Individualize medication for “target symptoms, target times”
• Stimulants outperform non-drug interventions but combination (drug & non-drug therapy) is best and permits lower drug doses.
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“Hyperactivity and impulsivity are among the most important
personality or individual difference factors that predict
later delinquency.”
Farrington 1996
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Disruptive Behaviour Disorders
OPPOSITIONAL DEFIANT DISORDER– Characterized by repeated arguments with
adults, loss of temper, anger, and resentment– Children with this disorder ignore adult
requests and rules, try to annoy people, and blame others for their mistakes and problems
– Between 2 and 16% of children will display this pattern
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Disruptive Behaviour Disorders
CONDUCT DISORDER – violate rights of others
• Aggression to people / animals
• Conduct causing property loss ordamage
• Deceitfulness or theft• Serious rule violation
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Disruptive Behaviour Disorders
Cases of conduct disorder have been linked to genetic and biological factors, drug abuse, poverty, traumatic events, and exposure to violent peers or community violence
– They have most often been tied to troubled parent-child relationships, inadequate parenting, family conflict, marital conflict, and family hostility
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Disruptive Behaviour Disorders
• Because disruptive behaviour patterns become more locked in with age, treatments for conduct disorder are generally most effective with children younger than 13
• Given the importance of family factors in this disorder, therapists often use family interventions
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Disruptive Behaviour Disorders
• Sociocultural approaches such as residential treatment programs have helped some children
• Individual approaches are sometimes effective as well, particularly those that teach the child how to cope with anger
• Recently, the use of drug therapy has been tried• Institutionalization in juvenile training centres
has not met with much success and may, in fact, increase delinquent behaviour
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Disruptive Behaviour Disorders
• It may be that the greatest hope for reducing the problem of conduct disorder lies in early intervention programs that begin in early childhood.
– These programs try to change unfavourable social conditions before a conduct disorder is able to develop.
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The latest analyses from the Dunedin longitudinal study show hyperactivity
in combination with CD or CD symptoms is clearly the most important
risk factor for becoming a serious persistent offender in adulthood.
Prof T Moffitt, Maudsley Hospital