Obesity a growing challenge
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Transcript of Obesity a growing challenge
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Obesity a growing challenge
GP ConferenceSeptember 2011
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Its no laughing matter!
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Time trends
3Lobstein et al. Obesity in children and young people: a crisis in public health. Obesity Reviews. 2004
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What’s the cost?“obese adults incur annual medical
expenditures that are $395 (36 percent) higher than those of normal weight incur” (direct costs, US)
Sturm, Health Affairs, 2002
“obesity accounts for 2–7% of a developed countries’ total health care costs”.(direct costs, US) WHO, Technical report 894, 2000
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NZ Food NZ Children, 2002
5Ministry of Health report, 2002: NZ Food NZ Children
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NZ Food NZ ChildrenObese, BMI >97th centile
% 5 – 14yo children
NZDep01 quintiles
Males Females
I 5.1 4.3
II 4.3 3.6
III 6.7 8.5
IV 9.5 11.5
V 16.1 19.5
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Prevalence of Extreme obesity BMI >99th centile
Goulding et al. Ethnic differences in extreme obesity. J Ped, 2007 7
For 5 – 14 year olds: NZ prevalence 2.7%; US 4%
Boys Girls
NZEO (n = 936) 0.8 (0.3-2.1) 0.8 (0.2-3.2)
Maori (n = 1118) 5.8 (3.9-8.8) 4.3 (2.7-6.9)
Pacific Island (n = 995) 11.4 (8.8-14.8) 10.4 (8.3-13.1)
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The context
Obesity Reviews pages 4-85, 16 APR 2004 DOI: 10.1111/j.1467-789X.2004.00133.xhttp://onlinelibrary.wiley.com/doi/10.1111/j.1467-789X.2004.00133.x/full#f2 8
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A framework of determinants
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What is normal?
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The Quincunxhttp://www.mathsisfun.com/data/quincunx.html
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Measuring obesity?Height/weight
Body Fat
Skin fold thickness
Abdominal circumference
Body Mass Index
BMI = 25, in a 10 year old?OK or not?
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Body mass index
Weight (kg) / [Height (m)]2
E.g.
ht 130 cm,
wt 42.5 kg.
BMI ~ 25.
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×
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Scenario10 yo girl, very overweight
Mother a little overweight, self-managesFather normal weightMother’s sisters, brother, grandmother
overweight and family history of Type 2 IDDM and heart disease
Girl’s behaviour deteriorating, isolation from peers.
Attempted dieting strategies, concerned about future health and current state of unhappiness.
“What are the specific health risks?”
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Acanthosis nigricans
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Multisystem disorder
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Bogalusa Heart Study1972 – 2005
Long term population study
Origins of heart disease
Childhood obesity noted as a major risk factor
Cumulative exposure over time… the life-course model
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Cardiovascular/IDDM risk
Factor Odds ratio
- Elevated diastolic 2.4
- Elevated LDL 3.0
- Reduced HDL 3.4
- Elevated systolic 4.5
- Elevated triglycerides 7.1
- Decreased fasting insulin 12.6
58% two or more factors
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BMI > 95%ile in school children;
Freedman et al,, Pediatrics 1999; 103: p.1175-82The Relation of Overweight to Cardiovascular Risk Factors Among Children and Adolescents: The Bogalusa Heart Study
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NZ clinical guidelines
20Jull et al. JPHC, 2011, Clinical guidelines for weight management
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Guidelines Key themes:Improving lifestyles by engaging with
family/whanau values and beliefs
Achieved through mana-enhancing relationships with family /whanau
Motivational interviewing in successful interventions
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Obesity: diagnosis, prevention and treatment
DiagnosisBMI centile is useful diagnostically – practical,
objective, biologically meaningfulNormal BMI lower in childhood and rises through
adolescence
Prevention: complex, multifaceted population level interventions: resource intensive and variable outcomes
Treatment: increasing evidence for ‘hard work programmes’
22Reilly et al. Arch Dis Child 2002; 86:392-395
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Do you see what I see?Step one : awareness
Parents do not always recognise their child is overweight or obese
Overweight parents – less likely to recognise…
Health professionals may also not recognise…
Maximova et al. Do you see what I see? Int J Obesity. 2008 32:1008-1015 23
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How did we get here? History
Medical history
Activity level
Screen time
Sleep
Dietary habits / nutrition
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Where are we at?Examination
Ht, Wt, … BMI
Blood pressure (large cuff)
Skin – acanthosis nigricans
Oropharynx, teeth
Hepatomegaly
Pubertal stage
Joints and mobility
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What else do we need to know?
Investigations
LabsFasting glucose, lipids, LFT, TFT
Other co-morbiditiesE.g. Obstructive Sleep Apnoea, joints etc.
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What are we going to do about it?Interventions
Nutritional targets↓ frequency of meals outside home↓ intake sweet drinks↓ portion size↓ access to high energy density foods
Activity targets↑ moderate activity per dayParticipation of parents in active behaviours↓ screen time self-monitoring of activity
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NZ GuidelinesMajor approaches
Lifestyle (Family/Whanau - Food, Activity, Behaviour)DietaryPhysical activityBehavioural Strategies
Pharmacotherapy
Bariatric surgery
Clinical Guidelines for Weight Management in New Zealand Children and Young People , MOH, 2009 28
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FAB – family/whanauStrong evidence for the comprehensive
approach
‘Growing into weight’ to reduce BMI
Evidence for combined approach stronger than individual elements
Clinical Guidelines for Weight Management in New Zealand Children and Young People , MOH, 2009 29
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Behavioural approachesSelf monitoring
Stimulus control
Problem solving
Contingency management or contracting
Cognitive restructuring
Strong evidence, especially at family level approach
Clinical Guidelines for Weight Management in New Zealand Children and Young People , MOH, 2009 30
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PharmacotherapiesNo weight loss drugs are registered for use in
children
Weak evidence
Clinical trials for 12 yrs +ORLISTAT – GI lipase inhibitorSIBUTRAMINE – Serotonin/ NA reuptake inhibitor
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Bariatric SurgeryGastric banding, sleeve gastrectomy, Roux-en-Y
bypass
50kg/m2
‘Physiologically mature’
Commitment to lifestyle change
Not usually appropriate
Position statement by Australia and NZ Association of Paediatric Surgeons. March 2010. 32
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ProgrammesSome promising examples
‘Field’ community application of the evidence
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‘WATCH IT’ programmeLeeds, UK: Ruldoph and colleagues
Moderately to severe obese children
Disadvantaged communities
Mean age 12.0 yrs
Reduction BMI 0.07-0.13 SD at 6 months
Qualitative increase in self-confidence, friendships and reduced self-harm
Delivered by health trainers, supervised by health professionals
Arch Dis Child 2006;91:736-739 doi:10.1136/adc.2005.089896WATCH IT: a community based programme for obese children and adolescents 34
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‘HIKCUPS’ trialAustralian, multicentre, RCT
Three groups1. Parent centred dietary modification
2. Child centred physical activity development
3. Programme with 1 & 2
BMI reduced at 12/121. SD −0.39 [−0.51 to 0.27]
2. SD −0.32, [−0.36, −0.23]
3. SD −0.17 [−0.28, −0.06]
Rachel A Jones et al. BMC Public Health 2007;7:15 The HIKCUPS trial: a multisite randomised controlled trial of a combined physical activity, skill development and dietary modification programmein overweight and obese children 35
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Project EnergiseEarly indications goodWaikato schools, activity and nutrition interventionDemonstrable benefits 6 yrs into study44,000 children, 244 schools, 27 “Energizers” and
1 dietitian. Energizers act as a ‘one stop shop’ to support
activities that promote and coordinate improved nutrition and physical activity within schools.
less than $40 per child each year. 3% less obesity and overweight prevalence, faster
550m running…
http://www.sciencemediacentre.co.nz/2011/07/25/project-energize-boosts-waikato-kids-health/ 36
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Clinical guidelines, NZ, MOH, 2009 37
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Clinical guidelines, NZ, MOH, 2009 38
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Its small steps walked together, that produce these results, small steps by some measures, results in big strides in our lives.By Rob Bear.