eating disorders in children and adolescents€¦ · adolescent sensitivity to ... between the...
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James Lock, M.D., Ph.D. Professor of Child Psychiatry and Pediatrics
Stanford University School of Medicine
Eating Disorders in Children and Adolescents
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Overview --How are Eating Disorders Different in Children and adolescents? --Why are Eating Disorders Different in Children and Adolescents? --How do Differences in Children and Adolescents with Eating Disorders Change Treatment?
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--How are Eating Disorders Different in Children and adolescents?
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Anorexia Nervosa � Weight loss below 85% expected
� Rapid weight loss no matter to what level has especially deleterious impact on growing children affecting bone health and growth
� Timing of pubertal maturation varies making projecting growth curves challenging (failure to gain weight during a period of growth)
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Anorexia Nervosa � Intense fear of weight gain � Body image distortion, over-emphasis on body weight
for self-esteem, or denial of the seriousness of malnutrition � Failure to endorse these fears and
distortions despite behavioral manifestations of this are common. This requires abstract reasoning, ability to label emotions, perspective taking
� We usually turn to “denial” to make a case
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Anorexia Nervosa � Amenorrhea (3 consecutive missed cycles) � Variation in menstruation onset, instability
of cycles in early adolescence (25% in first year), not applicable to males with AN
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Bulimia Nervosa
Overvaluation of weight and shape on self-worth � Similar problems with abstract reasoning,
perspective taking, emotional awareness as in AN Binge eating and purging � Availability of foods, opportunities for binge eating
are not under child’s control; opportunities for purging and ability to purge may also be limited
Duration of 3 months at least two episodes per week -- Harder to be secretive and not be discovered.
This means that INTENT may be more important than duration of frequency for behaviors
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Atypical Eating Disorders
� Selective Eating � Extreme faddy/picky eating that persists into
middle childhood � Highly limited range of foods � Extreme reluctance to try new foods � May be primary or secondary to “trauma” e.g.,
choking, gagging, vomiting � May be associated with general avoidance of
novelty and shyness � May be linked to AN � Impaired functioning in social and family milieu,
nutritional problems
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Food Related Phobias
� Common in middle childhood � Fear of eating because they will vomit, have diarrhea,
allergic reactions, health fears � Display phobic behaviors in relation to feared outcome
that they can describe (unlikeSelective Eating)
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Implications of Diagnostic Uncertainty in Eating Disorders in Children and Adolescents
EDNOSBNAN
63.3%n=636
12.4%n=124
24.3%n=244
EDNOSBNAN
63.3%n=636
12.4%n=124
24.3%n=244
EDNOSBNpBNANpAN
14.5%n=146
11.9%n=119
18.6%n=187
24.3%n=244
30.7%n=308 EDNOS
BNpBNANpAN
14.5%n=146
11.9%n=119
18.6%n=187
24.3%n=244
30.7%n=308
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--Why are Eating Disorders Different in Children and Adolescents?
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ars.els-cdn.com/content/image/1-s2.0-S0006322 Hudson et al. 2006
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Timing of Presentation
� Earlier identification—parents, pediatricians, mental health professionals provide oversight that increases likelihood of referral
� Symptoms may be less evolved both behaviorally and cognitively (e.g., weight loss less in AN)
� Symptoms less intense (e.g., shorter duration and frequency)
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Social/Cultural Factors � Influence of media on body shape and
health norms (the thin ideal) � Adolescent sensitivity to cultural beauty/
appearance norms � Resistance/accommodation to assault on
women’s bodies by fashion dictates � cultural values of discipline, perfection,
asceticism
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Psychological/Developmental � Developmental--fear and avoidance of
adolescent challenge � Behavioral--psychological, social, and
physiological reinforcement of restrictive eating and weight loss
� Family—concerned and anxious parents inadvertently lead to increased struggles with independence
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General Biological Factors � Many neurobiological changes are
associated with eating disregulation and starvation
� Genetic studies suggest a significant role for heritability, but what is heritable is less clear (e.g., neurotransmitter abnormalities, personality, temperament, propensity for eating dysregulation)
� Imaging studies suggest acute and persistent changes in both AN and BN, possibly involving the temporal-parietal areas
� Neurotransmitter studies suggest a role for a variety of neurotransmitters, especially serotonin and dopamine
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Executive Functioning --Brain Development --Cognitive Style
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Right lateral and top views of the dynamic sequence of gray matter maturation over the cortical surface. The side bar shows a color representation in units of gray matter volume. The supramarginal gyrus is the last area of parietal cortex to develop, between the third brain from the left (approximately 13 years of age) and the fourth (approximately 16 years of age). Reprinted with permission from [9]. Copyright (2004) National Academy of Sciences, USA
www.sciencedirect.com/.../pii/S1364661304002086
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Unit Anatomy: Prefrontal Cortex—Executive Functioning
en.wikipedia.org/wiki/File:Prefrontal_cortex.png
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psycnet.apa.org/journals/bne/125/3/282.html
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Neuropsychology and Eating Disorders
� The frontal lobe is generally implicated � Dorsolateral Prefrontal Cortex (dlPFC) � Mental flexibility, organization, planning and
concept formation � Medial Prefrontal Cortex (mPFC) � Initiating and maintenance of behavior
� Orbitofrontal Cortex (OFC) � Behavioral inhibition, learning from reinforcement
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Neurocognitive Features of Eating Disorders
� Studies have suggested two broad domains of neurocognitive inefficiencies in eating disorders
� Weak central coherence
� Difficulties in set-shifting
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Weak Central Coherence � Characterized by an overly detailed-focused
cognitive style � Focus on details obscures the bigger picture � Leads to poorer recall of both “big picture”
and details � Impairs integration and organization of
information � Can lead to a focus on one aspect of a given
situation or global set of information
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Can you spot the face in the coffee beans?
Image taken from Mighty Optical Illusions
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Rey-Osterrieth
Low weight AN subject Low weight medical subject
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Set-shifting
� Refers to the ability to think flexibly � To move between thoughts, ideas, concepts � Related to complex problem-solving � Related to aspects of future planning and managing
ambiguity
� Difficulties in set-shifting can lead to � Behavioral and cognitive rigidity (“black and white”
thinking) � Perseverative and perfectionistic behaviors � Difficulties in managing fluid/dynamic situations, such as
social communication
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Illusions
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How about this one?
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How do Differences in Children and Adolescents with Eating Disorders Change Treatment?
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Overall Implications � Who Gets Treatment � Treatment Timing and Goals � Treatment Approach � Treatment Outcome
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Who Gets Treatment � Children and adolescents who do not meet
full diagnostic criteria need treatment � Referral should not be delayed until children
and adolescent meet “adult” criteria for an eating disorder
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Timing of Treatment: Limited Window of Opportunity
00.10.20.30.40.50.60.70.80.9
Months 45 55 61 63 11
013
529
045
0
Percent ANPower (Percent AN)
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Outcomes in Anorexia Nervosa � Psychological/Social/Medical � Developmental--school failure, social
isolation, increased ambivalent dependence on family
� Increased rates of depression, anxiety disorders, and substance use/abuse
� Suicide accounts for one-half of mortality rate � Decreased marriage rates/fewer children � Medical problems and increased mortality
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Outcomes in Bulimia Nervosa � Medical: Hypokalemia, espophogeal tears, gastric
disturbances, dehydration, orthostasis, cardia arrythmias, amenorrhea, osteopenia, death
� Psychiatric: depression, personality disorders, substance abuse disorders, anxiety disorders
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Treatment Approaches
� Use of hospitalization � Use of Individual Therapy � Use of Family Therapy � Use of Medications � Use of Cognitive Remediation?
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Hospital Treatment (Crisp et al 1991)
70
75
80
85
90
95
Baseline One Year
Assessmentonly
Inpatient
Outpatient(family andindividual)
Outpatient(group)
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Hospital Treatment (Gowers et al 2007)
13
14
15
16
17
18
19
20
Baseline Year 1 Year 2
Specialized GeneralInpatient
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Treatment should be on individual psychological issues: Family studies (Russell et al, 1987; Eisler et al., 1997)
60
70
80
90
100
110
Inpt Dis 1yr 3yr 5yr
%IBW FT
IT
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RCTs for Adolescent BN
Remission
0102030405060708090
100
Baseline Post-treatment 6 mo. Follow-up
Percent
FBT-BNSPT
p = .049p = .050 0
51015202530354045
Baseline 6months
12months
FTCBT
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Medications Treatment
� There are case reports on the use of olanzapine in treating children and adolescents with AN at low body weights report improvement in compliance and weight gain, decreases in agitation, and anxiety
� One RCT compared risperidone vs usual care. Medication was tolerated. No differences in outcome
� No RCTs using antidepressant treatment for AN; one case series in adolescent BN showed tolerability
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Cognitive Style and Anorexia Nervosa-Rationale For Cognitive Remediation Therapy � Cognitive rigidity supports the rule-bound
approach to dieting, exercise, and performance metrics common in AN; this contrasts with the impulsive style of BN subjects
� Over focus on detail supports cognitive rigidity through obsessive review and analysis
� Weak central coherence supports denial of major global problems that result from AN (medical, work and social problems)
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Concluding Observations: Toward a New Treatment Paradigm for Children and Adolescents with Eating Disorders?
• Don’t wait, treat early • Treat in outpatient setting, avoid
hospitals possible (not always possible) • Involve parents, use family therapy • Treat to full symptomatic resolution • Don’t put too much hope on
medications, but treat co-morbid disorders
• Have appropriate medical and other ancillary support, but don’t overdo it