Obesity in Children Treatment & Management

Theoretically, any therapeutic interventions in the child with obesity must achieve control of weight gain and reduction in body mass index (BMI) safely and effectively and should prevent the long-term complications of obesity in childhood and adulthood.

Manage any acute or chronic complications of obesity (see Prognosis) and request psychiatric assistance for unusual eating disorders or severe depression. Devise a care plan that emphasizes long-term diet and exercise, family support, and the avoidance of dramatic swings in body weight. A team approach to therapy, involving the efforts of nurse educators, nutritionists, exercise physiologists, and counselors, is likely to prove most effective. Consultations with a pulmonary (sleep) medicine specialist, orthopedist, and/or gastroenterologist may be appropriate in some cases. Avoid a punitive approach and reward positive behaviors.

Recognize that a loss of 5-20% of total body weight can reduce many of the health risks associated with obesity in adults; however, whether modest weight loss or moderate reductions in BMI can improve outcomes in pediatric patients or reduce the long-term risks of obesity in adulthood is not known. Because dramatic reductions in BMI are difficult to achieve and sustain in children and adolescents as well as adults, initiating counseling and therapy may be prudent with realistic goals that emphasize gradual reductions in body fat and BMI and maintenance of weight loss rather than a rapid return to ideal body weight. Reductions in body weight are accompanied by equivalent reductions in energy expenditure. Consequently, maintenance of a given weight in a patient with obesity necessitates a lower energy intake than maintenance of an equivalent weight in a patient who has never been obese.

Kalarchian et al found that family-based behavioral weight control is effective for severely obese children.^[20] In a randomized, controlled trial in 192 children aged 8-12 years whose average body mass index (BMI) percentile for age and sex was 99.18, intervention was associated with significant decreases in percentage of child overweight at 6 months compared with usual care. Small significant improvements in medical outcomes were observed at 6 and 12 months.^[20] Children who attended 75% or more of intervention sessions maintained decreases in percentage overweight through 18 months.

Wildes et al found that in severely obese children, binge eating affects initial response to family-based behavioral treatment.^[21] In a randomized controlled trial in 192 children aged 8-12 years, children who self-reported binge eating showed a 2.6% increase in percentage overweight in response to acute treatment, whereas those without binge eating showed an 8.5% decrease; this difference was not maintained during longer-term follow-up. Children who reported binge eating comprised 11.5% of study subjects, and they were younger; had more depressive, anxiety, and eating disorder symptoms; and had lower self-esteem than those without binge eating.^[21]

Any intervention is likely to fail if it does not involve the active participation and support of family members. The child at hand may be only one of many family members who have obesity, and successful treatment often requires a change in the entire family's approach to eating. In selected cases, family therapy may be highly beneficial.

Oude et al concluded that, although no one treatment program can be conclusively recommended, combined behavioral lifestyle interventions produce a significant reduction in weight. Although orlistat and sibutramine (withdrawn from US market) may be used as adjuncts to lifestyle interventions, they must be carefully considered.^[22]

Smoking tobacco reduces appetite and is used by many adults and some teenagers to prevent or limit weight gain. The deleterious consequences of smoking clearly outweigh the benefits achieved by weight control, and all children and adolescents should be urged never to smoke. Measures to prevent excessive weight gain should be undertaken in obese adolescents who discontinue smoking.

Physicians and parents should encourage children to participate in vigorous physical activity throughout adolescence and young adulthood and to limit time spent watching television and videos and playing computer games. Even regular walking for 20-30 minutes per day can facilitate weight control.

Exercise reduces weight accretion through increases in energy expenditure and has favorable effects on cardiovascular status, decreases body fat and total cholesterol levels, increases lean body mass and high-density lipoprotein (HDL) levels, and improves psychologic well-being. Controlled trials have demonstrated that lifestyle exercise programs, in association with dietary restrictions, provide long-term weight control in children and adolescents.

The results from a systematic review and meta-analysis study noted that exercise referral schemes have not been proven as an effective means of increasing physical activity or reducing depression in sedentary individuals when compared with usual care. Further studies are needed to assess the effect on health-related outcomes.^[23] However, the results from a 2012 study suggest that low levels of cardiorespiratory fitness have also been associated with elevated depressive symptoms in obese adolescents.^[5]

An energy-restricted balanced diet, in association with patient and parent education, behavioral modification, and exercise can limit weight gain in many pediatric patients who have mild or moderate obesity.

Programs that modify family patterns of eating are most likely to be successful. One study noted that patients who attended 12-week commercial weight-management programs realized greater weight loss than those who received primary care programs, which were more costly to provide.^[24]

Reductions in total and saturated fat may be particularly useful in adolescents who consume large quantities of high fat, snack, and packaged fast foods, including french fries, pizza, chips, and crackers.

The average diet for children and adolescents in the United States contains approximately 35% fat. Reducing fat intake to 30% of total energy is recommended by the World Health Organization (WHO); however, little evidence, epidemiologic or experimental, supports the idea that a reduced-fat but otherwise unlimited diet suffices for substantial weight reduction in obese individuals. A reduced-fat diet may be more useful for primary or secondary prevention of weight gain in individuals with previous obesity individuals, particularly in those with a familial susceptibility.

Very controlled–energy diets

A protein-sparing modified fast can achieve rapid weight loss in an inpatient or outpatient setting and has been successfully used by numerous investigators in children and adolescents with obesity. For example, a year-long study of 73 pediatric patients aged 7-17 years showed significant reductions in the percentage overweight, total body fat (TBF), body mass index (BMI), total and low-density lipoprotein (LDL) cholesterol, triglycerides, and fasting serum insulin with no change in fat-free mass. Unfortunately, this study and many others combined the diet with behavior modification and a vigorous exercise program; thus, assessing the effects of the diet itself is impossible.

Duckworth et al found that a high-protein diet does not reduce obese children's desire to eat.^[25] Overweight and obese children who were assigned to 1 of 2 isoenergetic diets, a standard 15% protein diet or a 25% protein diet, achieved similar effects on weight loss, body composition, and changes in appetite or mood. Overall, children lost 5.2 ± 3 kg in body weight and reduced their BMI standard deviation score by 0.25. However, with both diets, ratings of desire to eat significantly increased over the duration of the intervention.^[25]

In general, very controlled–energy diets are hampered by high dropout rates and, in adults, have been associated with losses in lean weight, gallstone formation, cardiac arrhythmias, and sudden death. Moreover, some studies suggest that regain of weight after severe dieting may lead to overshoot, with excess weight deposited as a higher percentage of body fat. Concerns have been raised regarding the long-term cardiovascular risks of such weight cycling in adults, but the potential hazards of dramatic or cyclical weight changes in children and adolescents are unknown.

More important, the long-term effects of very controlled–energy diets on adolescent growth and development and subsequent reproductive function, musculoskeletal development, and intermediary metabolism remain poorly understood. Because of these uncertainties and the difficulties inherent in maintaining severe caloric restriction, the very controlled–energy diets cannot be recommended for the vast majority of children and adolescents with obesity.

Anecdotal evidence suggests that children with severe obesity may develop major psychiatric disorders (eg, suicide attempts, manic depression, other depressive disorders) that require hospitalization or long-term medication. Whether most of these psychiatric disorders predate, cause, or result from the obesity or its treatment is unclear. Like adults, children who enter obesity treatment programs may be at particularly high risk for the development of psychopathology.

Treatment of the psychiatric conditions may complicate or exacerbate problems associated with weight control, because numerous antidepressant medications, particularly tricyclic antidepressants (TCAs), stimulate appetite and weight gain. Offer psychologic support to patients who have obesity, and refer these patients for psychiatric evaluation and care if evidence of psychopathology or dysfunction is present.

As noted earlier, any therapeutic intervention in the child or adolescent with obesity is unlikely to succeed without the understanding, approval, and active participation of family members. Family therapy is effective in patients resistant to other therapeutic interventions, particularly those with parents who have obesity. (See Family-Based Behavioral Treatment)

Various bariatric surgical procedures have been used in adults and some adolescents (in most centers, patients ≥ 15 y) with a body mass index (BMI) of more than 40 kg/m² or weight exceeding 100% of ideal body weight (IBW).

Vertical-banded gastroplasty

The most common procedures involve gastric restriction. In the vertical-banded gastroplasty (VBG), a pouch of 15-30–mL capacity is constructed, greatly reducing the amount of food that can be eaten at any time. In the gastric bypass, a larger pouch that empties into the jejunum is created. As a result, nutrients bypass the duodenum and most of the stomach, which often creates a dumping syndrome. Overall effectiveness is good with significant weight loss, reduction in obesity complications, and increased life expectancy; however, mortality rate of the procedure is 1% in adults, and complications include encephalopathy, nephrolithiasis, cholelithiasis, protein-losing enteropathy, and other nutritional deficiencies.

Laparoscopic adjustable gastric banding

Laparoscopic placement of an adjustable gastric band (LAGB) has supplanted the VBG, both because of its relative safety and because of its reversibility. Use of the LAGB involves placing a collar with an internal, saline-filled balloon around the upper stomach, 1-2 cm below the esophagogastric junction. This creates a 30-mL upper gastric pouch that can be modified by injecting a small amount of saline into a subcutaneous port linked to the balloon.

Data suggest that the LAGB is associated with superior outcomes relative to those observed following VBG, and its low complication rate and reversibility make LAGB a viable alternative treatment for the adolescent patient. Nevertheless, the LAGB, or any surgical approach, should be considered only in the most severe cases of adolescent obesity that are resistant to all other forms of therapy.

O'Brien et al found that in adolescents, laparoscopic adjustable gastric banding resulted in a greater percentage of patients achieving a loss of 50% of excess weight, compared with lifestyle intervention.^[26] In a prospective, randomized controlled trial in 50 patients aged 14-18 years with a BMI higher than 35 kg/m², 21 patients (84%) in the gastric banding and 3 (12%) in the group assigned to supervised lifestyle intervention lost more than 50% of excess weight, corrected for age. Overall, the mean changes in the gastric banding group were a weight loss of 34.6 kg, representing an excess weight loss of 78.8%, 12.7 BMI units, and a BMI z-score change from 2.39 to 1.32.^[26] The mean losses in the lifestyle group were 3 kg, representing an excess weight loss of 13.2%, 1.3 BMI units , and a BMI z-score change from 2.41 to 2.26.

In the absence of a clear, organic etiopathogenesis (eg, leptin deficiency, other hormonal abnormalities), the long-term management of moderate or morbid obesity in adulthood is highly problematic and rarely successful. Preventing the development of obesity in childhood and adolescence is more likely to reduce long-term complications than treatment of obesity in adults (see Long-term complications of childhood obesity under Prognosis).

Further studies are needed to achieve the following:

• Identify young children who are predisposed to adolescent and adult obesity
• Identify interventions that prevent the development of obesity in children at risk
• Assess the long-term risks of obesity in prepubertal children
• Identify measures that prevent further weight gain in children and adolescents with obesity

In 2008, The Endocrine Society released guidelines for the prevention and treatment of childhood obesity.^[27]

In 2010, the American Heart Association/American Stroke Association (AHA/ASA) issued guidelines for the primary prevention of stroke. A few of the recommendations were as follows^[28] :

• Diet and nutrition: A diet that is low in sodium and high in potassium is recommended to reduce blood pressure; diets that promote the consumption of fruits, vegetables, and low-fat dairy products such as the Dietary Approaches to Stop Hypertension (DASH)–style diet help lower blood pressure and may lower risk of stroke
• Physical inactivity: Increasing physical activity is associated with a reduction in the risk of stroke; the goal is to engage in at least 30 minutes of moderate intensity activity on a daily basis
• Obesity and body fat distribution: Weight reduction among overweight and obese persons is recommended to reduce blood pressure and risk of stroke

Learning life-long habits that incorporate exercise and healthy eating is essential and research is emerging regarding various methods of educating youth.

In a systematic review and meta-analysis to determine the effect of school-based physical activity interventions on body mass index (BMI) in children, Harris et al concluded that current population-based policies that mandate increased physical activity in schools are unlikely to have a significant effect on the increasing prevalence of childhood obesity.^[29] Meta-analysis showed that BMI did not improve with physical activity interventions.

In contrast, a Swedish study by Marcus et al determined that school-based intervention can reduce obesity in children aged 6-10 years and may affect home-based eating habits.^[30] The study of 3135 boys and girls found a 3.2% decrease in prevalence of obesity and overweight at schools where intervention was attempted. A German study also concluded that school-based intervention was effective, after noting that intervention resulted in 31% reduction in the risk of overweight,^[31] and a Dutch study reported beneficial effects of a Dutch Obesity Intervention program.^[32]

The results of another study suggest that school wellness policies, mandated by the 2004 Child Nutrition and WIC Reauthorization, can significantly reduce the risk of adolescent obesity. Specifically, wellness policies related to diet were significantly associated with lower BMI, while those related to physical activity were significantly associated with lower odds of severe obesity only.^[33]

A Cochrane Database of Systemic Reviews study notes that child obesity prevention programs implemented in the health, education and care systems and targeted to children aged 6-12 years may have a positive effect on BMI.^[34]

A recent European Youth Heart Study confirms that improving fitness habits in children correlates with a lower incidence of obesity in adolescence.^[12]

For patient education information, see Diabetes Center, Cholesterol Center, as well as Diabetes, Lowering High Cholesterol in Children, Obesity, Obesity in Children, Weight Loss and Control, and Gallstones.

Regular follow-up is indicated in patients with obesity for the following reasons:

• Reinforcement of nutritional goals and exercise objectives
• Identification of social and emotional barriers to therapy
• Family support and counseling (if indicated)
• Assessment of growth, pubertal development, and reproductive function
• Assessment of glucose tolerance and fasting lipid levels
• Identification and management of obesity-related acute and chronic complications