Child and Adolescent Obesity :Causes and Consequences, Prevention and Management

Publication subTitle :Causes and Consequences, Prevention and Management

Author: Walter Burniat; Tim J. Cole; Inge Lissau  

Publisher: Cambridge University Press‎

Publication year: 2006

E-ISBN: 9780511060090

P-ISBN(Paperback): 9780521026642

Subject: R723.14 obesity

Keyword: 儿科学

Language: ENG

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Child and Adolescent Obesity

Description

This book addresses the ever increasing problem of obesity in children and adolescents, the long-term health and social problems that arise from this, and approaches to prevention and management. Aimed at doctors, and all health-care professionals, it will be of interest to all those concerned with the increasing prevalence of obesity in both the developed and developing world. It covers all aspects of obesity from epidemiology and prevention to recent developments in biochemistry and genetics, and to the varied approaches to management which are influenced by social and clinical need. A foreword by William Dietz and a forward-looking 'future perspectives' conclusion by Philip James embrace an international team of authors, all with first-hand experience of the issues posed by obesity in the young. This comprehensive survey of an important and growing medical problem will help inform, influence and educate those charged with tackling this crisis.

Chapter

2 Epidemiology

2.1 Introduction

2.2 Epidemiology and methods

2.2.1 Definition

2.2.2 Current practice

What is done in practice?

2.3 The scale of the problem

2.3.1 Current prevalence

2.3.2 Trends in obesity and overweight prevalence

2.3.3 What can we learn from the BMI distribution?

2.3.4 Risk factors

Heritability

Socioeconomic status

School performance

Ethnicity

Critical periods of growth

2.4 Conclusions

2.5 REFERENCES

3 Molecular and biological factors with emphasis on adipose tissue development

3.1 Introduction

3.2 Regulation of body weight

3.3 Single gene defects

3.3.1 Congenital leptin deficiency

3.3.2 Leptin receptor defect

3.3.3 Prohormone convertase 1 (PC 1) defect

3.3.4 POMC deficiency

3.3.5 Melanocortin-4-receptor defect

3.3.6 Peroxisome-proliferator-activated receptor Gama-2 (PPARGama-2) defect

3.4 Regulation of body energy stores at adipose tissue level

3.5 Changes of body fat stores during development

3.6 Changes at cellular level related to changes in body fat

3.7 Lipid storage in adipose tissue (lipogenesis)

3.8 Lipid mobilization (lipolysis)

3.9 Preadipocytes in human adipose tissue

3.10 Proliferation and differentiation of preadipocytes

3.11 Adipogenic activity of human serum

3.12 Hormonal and nutritional factors regulating adipose differentiation

3.13 Human adipocytes are secretory cells

3.14 Conclusions

3.15 REFERENCES

4 Nutrition

4.1 Introduction

4.2 Secular trends of nutrition and obesity

4.3 Relationship between nutrition and adiposity

4.3.1 Relationship between nutrition and total adiposity

Cross-sectional studies

Retrospective analysis and longitudinal studies

4.3.2 Relationship between macronutrient intake and body fat distribution

4.4 Qualitative assessment of intake behaviour

4.4.1 Circadian distribution of food intake and adiposity

4.4.2 Daily meal number

4.4.3 Snacking

4.4.4 Binge eating

4.4.5 Other behavioural symptoms

4.4.6 Food preferences

4.5 Lifestyle

4.6 Conclusions

4.7 REFERENCES

5 Physical activity

5.1 Introduction

5.2 Energy expenditure assessment

5.3 Energy intake vs. energy expenditure

5.4 Components of total energy expenditure

5.4.1 Basal metabolic rate

5.4.2 Meal-induced thermogenesis

5.4.3 Physical activity

5.5 Excess energy intake vs. low energy expenditure

5.5.1 Reduced energy expenditure as a predictor of weight gain

5.5.2 The impact of television

5.6 Aerobic capacity… in obesity

5.7 Substrate oxidation and substrate balance

5.8 Conclusions

5.9 REFERENCES

6 Psychosocial factors

6.1 Children’s social background

6.2 Attitudes to obesity

6.2.1 Children’s perception of obesity

6.2.2 Attributions of health and social class effects

6.2.3 Stereotyping

6.3 Children’s self-worth

6.3.1 Self-perception and self-esteem

6.3.2 Self-esteem conceptualization and assessment

6.3.3 Psychological health

6.4 Parents and peers

6.4.1 Parental control of eating

6.4.2 Family interaction and functioning

6.4.3 Peer behaviour

6.5 Conclusions

6.6 REFERENCES

Part II Consequences

7 Clinical features, adverse effects and outcome

7.1 Clinical findings and immediate adverse effects

7.1.1 Growth

Height for age

Pubertal development

7.1.2 Cosmetic problems

Excess tissue

Acanthosis nigricans (AN)

7.1.3 Hormonal problems

Polycystic ovary (Stein–Leventhal) syndrome

7.1.4 Orthopaedic problems

Blount’s disease

Slipped capital femoral epiphysis (SCFE)

7.1.5 Gastrointestinal problems

7.1.6 Respiratory and sleep-related problems

Sleep disorders

Pickwick syndrome

7.1.7 Neurological problems

Pseudotumor cerebri (PTC)

7.1.8 Immunological problems

7.1.9 Metabolic problems

Hyperinsulinaemia

Dyslipidaemia

7.1.10 Psychosocial problems

7.2 Intermediate medical consequences

7.2.1 Persistence of obesity

7.2.2 Psychosocial problems

7.2.3 Cardiovascular consequences

7.3 Long-term consequences

7.4 REFERENCES

8 The obese adolescent

8.1 Biophysical factors

8.1.1 Introduction

8.1.2 Puberty

8.1.3 Body composition and energy expenditure

8.1.4 Leptin and puberty

8.1.5 Genetic background and critical periods

8.1.6 Cardiovascular risk factors

8.1.7 Other endocrinological disorders and contraception

8.1.8 Vitamin and mineral status

8.1.9 Complications

8.2 Psychological aspects

8.2.1 The adolescent psyche

8.2.2 What is important for the obese adolescent?

8.2.3 How to approach the obese adolescent

8.2.4 The severely obese adolescent with problems

8.2.5 Day-care programmes

8.2.6 Eating disorders and obesity

8.2.7 Conclusions

8.3 REFERENCES

9 Prader–Willi and other syndromes

9.1 Introduction

9.2 Endocrine problems

9.2.1 Hypothyroidism

9.2.2 Cushing’s syndrome and hyperadrenocorticism

9.2.3 Growth hormone deficiency

9.3 Prader–Willi syndrome (PWS)

9.3.1 Description

Perinatal features

Childhood

9.3.2 Diagnosis

9.3.3 Endocrinological anomalies

9.3.4 Management

9.4 Other obesity syndromes

9.4.1 Bardet–Biedl syndrome (BBS)

9.4.2 Laurence–Moon syndrome

9.4.3 Biemond syndrome

9.4.4 Alstrom syndrome

9.4.5 Borjeson–Forssman–Lehmann syndrome (BFLS)

9.4.6 Carpenter syndrome

9.4.7 Cohen syndrome (or Pepper syndrome)

9.4.8 Single-gene defects affecting leptin synthesis and metabolism

9.5 REFERENCES

10 Hormonal and metabolic changes

10.1 Pituitary–adrenal axis

10.2 Pituitary–gonadal axis

10.2.1 Ovary

10.2.2 Testis

10.3 Pituitary–thyroid axis

10.4 Growth hormone and insulin-like growth factors

10.5 Hyperinsulinaemia and insulin resistance

10.6 Leptin

10.6.1 Leptin and obesity

10.6.2 Leptin and body fat distribution

10.6.3 Leptin and sexual dimorphism

10.6.4 Leptin and puberty

10.6.5 Other functions of leptin

10.7 REFERENCES

11 Risk of cardiovascular complications

11.1 Introduction

11.1.1 Classification of overweight

11.2 Secular trends

11.3 Associations with risk factors

11.3.1 Overweight and lipid testing

11.4 Body fat patterning

11.5 Longitudinal analyses

11.5.1 Tracking of overweight and obesity

11.5.2 Relation of childhood overweight to subsequent disease

11.6 Conclusions

11.7 REFERENCES

Part III Prevention and management

12 Prevention

12.1 Prevention before management

12.2 Why prevention?

12.2.1 Primary prevention

12.2.2 The target population

12.2.3 Risk factors

12.3 Prevention strategy

12.3.1 Increase energy expenditure

12.3.2 Reduce energy intake

12.3.3 Reduce television watching

12.3.4 Side effects of prevention

Eating disorders

Smoking

12.4 Responsibilities for prevention

12.4.1 Family

Parent(s)

Child

12.4.2 School

12.4.3 Health professionals

12.4.4 Government

12.4.5 Industry

12.5 Reduce sedentary activity

12.5.1 Family

12.5.2 School

12.5.3 Health professionals

12.5.4 Government

Local government

National government

12.5.5 Industry

12.5.6 Television

12.6 Reduce poor dietary habits

12.6.1 Family

Avoid meal skipping

Eat good food

12.6.2 School

12.6.3 Health profession

12.6.4 Government

12.6.5 Industry

12.6.6 Television

12.7 Prevention programmes

12.8 Monitoring and evaluation

12.9 Conclusions

12.10 REFERENCES

13 Home-based management

13.1 Introduction

13.1.1 Goals of slimming

13.1.2 Can we do any good by formalizing slimming?

13.1.3 The part played by the family

13.1.4 Risks of treatment

13.2 Principles of modifying lifestyles to encourage slimming in obese children

13.2.1 What are the aims of slimming programmes?

Energy expenditure must exceed energy intake

Success is some fat loss rather than loss of all excess fat

Slimming is fat loss but not always weight loss

Avoid overindulgence in weighing

‘Slimming’ should not damage family dynamics

13.3 What can be recommended?

13.3.1 Activity

13.3.2 Suggestions for increasing energy expenditure without dramatic lifestyle changes

13.4 Eating and diet

13.4.1 Lifestyle changes in feeding patterns which may help fat reduction

13.4.2 Changing the family diet

13.4.3 Changes in the energy content of diets which have little impact on the volume of food consumed

13.5 Conclusions

13.6 REFERENCES

14 Dietary management

14.1 Introduction

14.2 History of dietary therapy

14.3 Aims of dietary treatment

14.4 Types of diet

14.4.1 Simple nutritional counselling or balanced normal-calorie diet

14.4.2 Balanced low-calorie diet

14.4.3 Very-low-calorie diet

14.5 Consequences of dieting

14.5.1 Positive consequences

Fat mass reduction and healthier body fat distribution

Reduced plasma lipids and apolipoprotein levels

Reduced blood pressure

14.5.2 Negative consequences

Lean body mass loss

Reduced linear-growth velocity

Anorexia and binge-eating disorders

Raised serum uric acid

Gallstones

14.6 Guidelines for weight goals and dietetic treatments

14.7 Conclusions

14.8 REFERENCES

15 Management through activity

15.1 Introduction

15.2 Aims of the programmes

15.3 Efficacy of exercise in lowering fat mass

15.4 General principles

15.5 Physical activity and exercise programmes

15.5.1 Leisure time

15.5.2 The choice of exercise for the obese child

15.5.3 Details of some progressive postural exercises

Body posture

Breathing exercises

Exercising individual parts of the body

15.6 How to improve compliance

15.7 The role of the family

15.8 Conclusions

15.9 REFERENCES

16 Psychotherapy

16.1 Obesity – a disease put into perspective

16.1.1 Psychosocial aspects of society

16.2 The treatment of obesity

16.2.1 Why do we need new treatments?

16.2.2 Psychodynamic therapy – an early perspective

16.2.3 Behavioural and cognitive therapies – a traditional and a new approach

16.2.4 Group therapy – more research is needed

16.2.5 School-based treatments – the basic approach

16.2.6 Early treatment – the treatment of choice

16.2.7 Family therapy – a new view on treatment

16.2.8 The questions are the answers

Linear questions

Circular questions

Strategic questions

Reflexive questions

16.2.9 Perspective on different psychotherapies

Obesity type A

Obesity type B

Obesity type C

Obesity type D

16.3 Conclusions

16.4 REFERENCES

17 Drug therapy

17.1 Appetite suppressants

17.1.1 Noradrenergic agents

Phentermine

17.1.2 Serotoninergic agents

Fenfluramine

Dexfenfluramine

Noradrenergic/serotoninergic agent (sibutramine)

17.2 Thermogenic agents

17.2.1 Ephedrine and xanthines

17.2.2 Atypical Beta-adrenoreceptor agonists

17.3 Digestive inhibitors

17.3.1 Lipase inhibitor

17.3.2 Fat substitutes

17.4 Hormone analogues and antagonists

17.5 REFERENCES

18 Surgical treatment

18.1 Introduction

18.2 Surgical techniques and their complications

18.2.1 Plastic surgery in obesity

18.2.2 Gastrointestinal bariatric surgery in adults

18.2.3 Complications

18.3 Bariatric surgery in adolescence

18.4 Conclusions

18.5 REFERENCES

19 Interdisciplinary outpatient management

19.1 Goal and general philosophy

19.2 Multifaceted treatment programmes

19.2.1 Psychoeducation

19.2.2 Diet

19.2.3 Exercise

19.2.4 Behaviour management

19.2.5 Parent training

19.2.6 Assertiveness training and social-skills training

19.2.7 Psychiatric Intervention

19.3 Organizing team work

19.3.1 Organizational aspects of the therapeutic process

The individually tailored approach: an illusion of interdisciplinary treatment?

The standardized treatment: interdisciplinary management running through the programme

Integrating the two approaches: interdisciplinarity embedded in the organization

19.3.2 Collaboration problems

19.4 Acknowledgements

19.5 REFERENCES

20 Interdisciplinary residential management

20.1 Historical background and implementation

20.2 Acomprehensive approach

20.2.1 Screening

20.2.2 Interdisciplinary management

The dietetic approach

Physical training

Psychological support

Educational support

Family involvement

20.3 Results and outcome

20.4 Conclusions

20.5 REFERENCES

21 The future

21.1 Introduction

21.2 Assessment of childhood obesity

21.3 Ethnic differences in children’s anthropometry

21.4 The Thrifty Genotype

21.5 The prevalence of childhood obesity

21.6 Weaning practices and early eating habits

21.7 The ‘obesogenic’ environment

21.8 Can policy initiatives work?

21.9 Devising and implementing new policies

21.10 REFERENCES

Index

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