Preventing and Treating Adolescent Obesity: A Position Paper of the Society for Adolescent Health and Medicine

Interventions for High Body Mass Index in Children and Adolescents: US Preventive Services Task Force Recommendation Statement

Importance

Approximately 19.7% of children and adolescents aged 2 to 19 years in the US have a body mass index (BMI) at or above the 95th percentile for age and sex, based on Centers for Disease Control and Prevention growth charts from 2000. The prevalence of high BMI increases with age and is higher among Hispanic/Latino, Native American/Alaska Native, and non-Hispanic Black children and adolescents and children from lower-income families.

Objective

The US Preventive Services Task Force (USPSTF) commissioned a systematic review to evaluate the evidence on interventions (behavioral counseling and pharmacotherapy) for weight loss or weight management in children and adolescents that can be provided in or referred from a primary care setting.

Population

Children and adolescents 6 years or older.

Evidence Assessment

The USPSTF concludes with moderate certainty that providing or referring children and adolescents 6 years or older with a high BMI to comprehensive, intensive behavioral interventions has a moderate net benefit.

Recommendation

The USPSTF recommends that clinicians provide or refer children and adolescents 6 years or older with a high BMI (≥95th percentile for age and sex) to comprehensive, intensive behavioral interventions. (B recommendation).

Screening for obstructive sleep apnea (OSA) in children and adolescents with obesity: A scoping review of national and international pediatric obesity and pediatric OSA management guidelines

Obstructive sleep apnea (OSA) is a prevalent complication that affects up to 60% of children and adolescents with obesity. It is associated with poorer cardiometabolic outcomes and neurocognitive deficits. Appropriate screening and intervention for OSA are crucial in the management of children with obesity. We performed a scoping review of international and national pediatric obesity (n = 30) and pediatric OSA (n = 10) management guidelines to evaluate the recommendations on OSA screening in pediatric obesity. Sixteen (53%) of the pediatric obesity guidelines had incorporated OSA screening to varying extents, with no consistent recommendations on when and how to screen for OSA, and subsequent management of OSA in children with obesity. We provide our recommendations that are based on the strength and certainty of evidence presented. These include a clinical-based screening for OSA in all children with body mass index (BMI) ≥ 85th percentile or those with rapid BMI gain (upward crossing of 2 BMI percentiles) and the use of overnight polysomnography to confirm the diagnosis of OSA in those with high clinical suspicion. We discuss further management of OSA unique to children with obesity. An appropriate screening strategy for OSA would facilitate timely intervention that has been shown to improve cardiometabolic and neurocognitive outcomes.

Screening for metabolic complications of childhood and adolescent obesity: A scoping review of national and international guidelines

The rise in prevalence of childhood obesity is paralleled by an increase in obesity-related metabolic complications, which add significantly to the population burden of cardiovascular morbidity in the long term. Early detection of obesity-related metabolic complications through appropriate screening strategies forms a crucial aspect of obesity management. We performed a scoping review of international and national guidelines on the management of pediatric obesity to evaluate the recommendations on screening for metabolic complications, namely, hypertension, diabetes, dyslipidemia, and non-alcoholic fatty liver disease. Thirty guidelines were included, 23 (76.7%) of which had some guidance on screening for metabolic complications. However, there were significant variations in the extent and details of recommendations for screening for these metabolic complications. There has been no consensus on the body mass index (BMI) thresholds, age of onset, frequency, and screening tests recommended for detecting hypertension, diabetes, dyslipidemia, and non-alcoholic fatty liver disease between guidelines. These variations did not appear to be polarized based on geographical location or population ethnicity. We provide our recommendations on metabolic screening based on the strength of evidence in the guidelines, also incorporating recommendations from key childhood hypertension, diabetes, and lipid guidelines. Appropriate implementation of screening strategies is crucial to improve detection of metabolic complications, to allow for earlier or more intensified interventions for affected children with obesity.

Correlation between lifestyle patterns and overweight and obesity among Chinese adolescents

Lifestyles such as physical exercise, sedentary behavior, eating habits, and sleep duration are all associated with adolescent overweight and obesity. The purpose of this study was to investigate how Chinese adolescents' lifestyles clustered into different lifestyle patterns, and to analyze the correlation between these patterns and adolescent overweight and obesity. The investigated respondents included 13,670 adolescents aged 13-18 from various administrative regions in China. Latent class analysis was employed to cluster the lifestyles of adolescents, χ2 test and Logistic regression were used to explore the relationship between lifestyle patterns and overweight and obesity in adolescents. The results identified 6 types of Chinese adolescents' lifestyle patterns, as well as the significant differences in gender and age. The adolescents with high exercise-high calorie diet had the lowest risk of overweight and obesity, and the adolescents with low consciousness-low physical activity and low consciousness-unhealthy had the highest risk of overweight and obesity, which were 1.432 times and 1.346 times higher than those with high exercise-high calorie diet, respectively. The studied demonstrated that there was a coexistence of healthy behaviors and health-risk behaviors in the lifestyle clustering of Chinese adolescents. Low physical exercise and high intake of snacks and carbonated beverages were the most common. Physical exercise and health consciousness were the protective factors of overweight and obesity in adolescents.

Prevention and Interventional Strategies of Adolescent Obesity / Overweight

Purpose: It’s a known factor that obesity and overweight among adolescentsare major emerging global health problems associated with morbidityand mortality throughout their life in developed and developing countries. There is evidence that reducing overweight and obesity by increasing awareness, self-efficacy, and contemplation to adopt a health-promoting lifestyle.The aim of this review how the theory and model used to reduce this burden through vicarious interventional activities among adolescence (10-19 years)in a school setting. Methods: A literature search was performed in four databases to identify published studies between January 2009 and December 2019. Randomized control trial exploring the multiple interventional effects on obesity and overweight by utilization of with or without theoretical constructs and outcome on body mass index. Results: Originally references searched were 2112 abstracts and full-text articles. The total population was 34,846 adolescents. Most of the multiple interventionshad little positive effect onphysical activity, dietary intake, and sedentary behavior changes directly on BMI. Only three studies show changes in behavior through theory. Minimal studies reported the involvement and motivation of parents, friends, and teachers for themselves and adolescents. Conclusion: The contemporary review to visualizemultiple interventions, and how models and theory focused on various pragmatic activities in the delivery and outcome in school settings among adolescents.

Branched-Chain and Aromatic Amino Acids in Relation to Fat Mass and Fat-Free Mass Changes among Adolescents: A School-Based Intervention

Plasma levels of branched-chain amino acids (BCAA) and aromatic amino acids (AAA) are considered early metabolic markers of obesity and insulin resistance (IR). This study aimed to assess changes in plasma concentrations of BCAA/AAA and HOMA-IR2 (homeostasis model assessment of IR) after intervention-induced modifications in fat mass (FM) and fat-free mass (FFM) among French Polynesian adolescents. FM, FFM, plasma levels of BCAA and AAA, HOMA-IR2 were recorded at baseline and post intervention among 226 adolescents during a 5-month school-based intervention on diet and physical activity. Participants were divided into two subgroups according to their college attendance status which determined their intervention adherence: externs/half-residents (n = 157) and residents (n = 69). Four ordinal categories of body composition changes post-intervention were created for the analysis (FMgain/FFMlost < FMgain/FFMgain < FMlost/FFMlost < FMlost/FFMgain). After 5 months, changes in BCAA (p−trend < 0.001) and AAA (p−trend = 0.007) concentrations were positively associated with ordinal categories of body composition. HOMA-IR2 significantly decreased with FMlost (−0.40; 95% CI, −0.60 to −0.20) and increased with FMgain (0.23; 95% CI, 0.11 to 0.36). Our results suggest that FM loss is associated with a decrease in concentrations of obesity and IR metabolic markers which is more substantial when FM loss is accompanied with FFM gain.

The Changing Landscape of Nutrition in Cystic Fibrosis: The Emergence of Overweight and Obesity

Cystic fibrosis has historically been characterized by malnutrition, and nutrition strategies have placed emphasis on weight gain due to its association with better pulmonary outcomes. As treatment for this disease has significantly improved, longevity has increased and overweight and obesity have emerged issues in this population. The effect of excess weight and adiposity on CF clinical outcomes is unknown but may produce similar health consequences and obesity-related diseases as those observed in the general population. This review examines the prevalence of overweight and obesity in CF, the medical and psychological impact, as well as the existing evidence for treatment in the general population and how this may be applied to people with CF. Clinicians should partner with individuals with CF and their families to provide a personalized, interdisciplinary approach that includes dietary modification, physical activity, and behavioral intervention. Additional research is needed to identify the optimal strategies for preventing and addressing overweight and obesity in CF.

Enabling Better Nutrition for Adolescents from Middle Eastern Backgrounds: Semi-Structured Interviews with Parents

The unyielding obesity epidemic in adolescents from Middle Eastern (ME) backgrounds warrants culturally-responsive and co-designed prevention measures. This study aimed to capture the opinions of ME parents residing in Australia on the crisis and their enablers and barriers to healthy eating interventions given their influence on adolescent eating behaviors. Twenty-six semi-structured interviews were conducted with ME mothers, aged 35-59 years, and most residing in low socioeconomic areas (n = 19). A reflexive thematic analysis using the Capability, Opportunity, Motivation-Behaviour model and Theoretical Domain Framework was conducted. Parents expressed confidence in knowledge of importance of healthy eating, but were reluctant to believe behaviours were engaged in outside of parental influence. Time management skills are needed to support working mothers and to minimize reliance on nearby fast-food outlets, which was heightened during COVID-19 with home-delivery. Time constraints also meant breakfast skipping was common. A culture of feeding in light of diet acculturation and intergenerational trauma in this diaspora was also acknowledged. Parents pleaded for upstream policy changes across government and school bodies to support parental efforts in the form of increased regulation of fast-food and subsidization of healthy products. Opportunities for weight-inclusive programs including parenting workshops underpinned by culturally-responsive pedagogy were recommended.

Encouraging physical fitness in Brazilian adolescents with excess weight: can they outperform their eutrophic peers in some activities?

BACKGROUND

There is the need to encourage physical activity (PA) among adolescents with overweight or obesity.

OBJECTIVES

The present study aimed to assess the relationship between health-related physical fitness (PF) and nutritional status, and to identify those activities more suited to adolescents with excess weight.

METHODS

This cross-sectional study included 3,062 in-school adolescents, aged 10-18 years. We collected information on sex, age, weight, height, skinfold thickness, trunk height and leg length, and calculated body mass index (BMI) z-score, fat mass percentage, and peak height velocity (PHV). Participants were tested for PF by the 20-m shuttle run test (cardiorespiratory fitness); medicine ball throw and standing long jump tests (musculoskeletal fitness) and sit and reach test (flexibility). We used generalized linear mixed models (GLMM) to analyze the relationship between nutritional status and performance in the fitness tests, controlled for maturity offset and fat mass percentage.

RESULTS

1,563 (51%) were boys, mean age 12.6 years (±1.8), 22.8% were overweight and 12.5% had obesity. In both sexes, adolescents with obesity did better in the upper body strength test than their eutrophic peers. Boys with obesity had worse cardiorespiratory fitness and lower body muscular strength than eutrophic boys. Girls with obesity had similar cardiorespiratory fitness and better lower body strength than eutrophic girls.

CONCLUSION

In muscular strength fitness tests, adolescents with obesity performed similarly to, or better than, their eutrophic peers. Motivation to maintain regular PA is reinforced by positive experiences. Interventions that emphasize muscular strength PF should be developed for adolescents with obesity.

Mid-adolescent ethnic variations in overweight prevalence in the UK Millennium Cohort Study

BACKGROUND

There are stark ethnic inequalities in the prevalence of UK childhood obesity. However, data on adolescent overweight in different ethnic groups are limited. This study assessed ethnic inequalities in overweight prevalence during mid-adolescence using body mass index (BMI) and explored the contribution of socioeconomic and behavioural factors.

METHODS

We analyzed data from 10 500 adolescents aged between 13 and 15 years who participated in sweep six of the Millennium Cohort Study. Ethnic inequalities in overweight and mean BMI were assessed using multiple regression models. Results were stratified by sex and adjusted for socioeconomic and behavioural factors.

RESULTS

Black Caribbean males had significantly higher BMI than White males after full adjustment [excess BMI 2.94, 95% confidence interval (CI) 0.70-5.19] and were over three times more likely to be overweight [odds ratio (OR): 3.32, 95% CI 1.95-5.66]. Black Africans females had significantly higher BMI compared with White females (excess BMI 1.86, 95% CI 0.89-2.83; OR for overweight 2.74, 95% CI 1.64-4.56), while Indian females had significantly lower BMI compared with White females (reduced BMI -0.73, 95% CI -1.37 to -0.09). Socioeconomic and behavioural factors often considered to be associated with overweight were more prevalent in some ethnic minority groups (lower socioeconomic position, lack of breakfast consumption, low fruit and vegetable intake, high sugar-sweetened beverage and fast-food consumption, and infrequent physical activity), but adjustment for these factors did not fully explain ethnic differences in overweight/BMI.

CONCLUSION

Ethnic inequalities in overweight prevalence are evident in mid-adolescence and vary according to sex. Differences in overweight/BMI between ethnic groups were not fully accounted for by socioeconomic or behavioural factors.

Identifying Key Determinants of Childhood Obesity: A Narrative Review of Machine Learning Studies

Machine learning is a class of algorithms able to handle a large number of predictors with potentially nonlinear relationships. By applying machine learning to obesity, researchers can examine how risk factors across multiple settings (e.g., school and home) interact to best predict childhood obesity risk. In this narrative review, we provide an overview of studies that have applied machine learning to predict childhood obesity using a combination of sociodemographic and behavioral risk factors. The objective is to summarize the key determinants of obesity identified in existing machine learning studies and highlight opportunities for future machine learning applications in the field. Of 15 peer-reviewed studies, approximately half examined early childhood (0-24 months of age) determinants. These studies identified child's weight history (e.g., history of overweight/obesity or large increases in weight-related measures between birth and 24 months of age) and parental overweight/obesity (current or prior) as key risk factors, whereas the remaining studies indicated that social factors and physical inactivity were important in middle childhood and late childhood/adolescence. Across age groups, findings suggested that race/ethnic-specific models may be needed to accurately predict obesity from middle childhood onward. Future studies should consider using existing large data sets to take advantage of the benefits of machine learning and should collect a wider range of novel risk factors (e.g., psychosocial and sociocultural determinants of health) to better predict childhood obesity. Ultimately, such research can aid in the development of effective obesity prevention interventions, particularly ones that address the disproportionate burden of obesity experienced by racial/ethnic minorities.

Effectiveness of lifestyle interventions in preventing harmful weight gain among adolescents: A systematic review of systematic reviews

Obesity in adolescence is associated with stigma during school years, early emergence of co-morbidities in adulthood and premature mortality. Adolescence presents a key window of opportunity to intervene for building healthy eating and physical activity routines and prevent weight gain. This review of reviews assesses the evidence on the effectiveness of prevention interventions conducted with adolescents. Nine reviews assessing the effects of lifestyle interventions in adolescents (defined as age 10 to 19 years old) on weight gain were identified from the 10 health databases searched. Only four reviews conducted meta-analyses, of which, three (two exercise-focused) demonstrated positive changes in primary outcomes of body mass index (BMI) and/or BMI z-score (range of decrease in BMI from 0.06 to 0.47 kg/m²⁾ ). Most were conducted in school settings, and all but two reviews were of low quality. Few reviews reported external validity components that would enable clearer directions for policy makers to implement in real-world settings. More than 140 distinct interventions were included in the reviews, but there remains a serious gap in evidence for effective interventions in adolescents.

Dietetic management of obesity and severe obesity in children and adolescents: A scoping review of guidelines

This scoping review describes current guidelines for the dietary management of pediatric obesity and severe obesity. Guidelines were identified via electronic searches of six databases, grey literature, and reference lists and included international clinical practice guidelines (n = 21), position papers (n = 5), and scientific/consensus statements (n = 2) produced by professional bodies and/or expert panels. All recommend multicomponent lifestyle interventions including diet, physical activity, and behavior modification as first-line treatment. Most guidelines (n = 21) recommend weight loss as a treatment goal for children and adolescents with obesity and associated comorbidities or severe obesity; 15 recommend using dietary approaches. Fourteen of 28 guidelines refer to the management of severe obesity, 10 refer to dietary approaches, and seven recommend using intensive dietary approaches. Dietary approaches to weight loss focus on caloric restriction (n = 14) with some guidelines recommending very low-energy diet (n = 4), protein-sparing modified fast (n = 2), and very low-carbohydrate/ketogenic diets (n = 2). A stronger evidence base is required for dietary management of pediatric obesity and severe obesity to improve consistency in future guidelines. Guidance on the use of dietary approaches, beyond caloric restriction, and in line with the growing evidence base on novel dietary approaches is required to facilitate personalized care and optimal patient outcomes.

Medications for the treatment of obesity in adolescents

While there are eight medications/combinations approved for the treatment of obesity in adults, the options for the treatment of obesity in adolescents remain limited. Evidence for obesity medication use in adolescents is limited due to the relatively small number of clinical trials that have been completed and the few adolescents that have been included in many of the trials. The goal of this review will be to present the current evidence for the medications approved for adolescents, medications not approved for adolescents but have adolescent data, and medications approved for adults with the prospect for use in adolescents. We will also discuss current limitations and next steps in the exploration of future treatment options.

Identifying obesity/overweight status in children and adolescents; A cross-sectional medical record review of physicians' weight screening practice in outpatient clinics, Saudi Arabia

BACKGROUND

BMI is a feasible and recommended measure for overweight and obesity screening in children and adolescents. The study aimed to determine how often physicians correctly identified obesity/ overweight status in children and adolescents by using BMI percentile charts.

METHODS

This retrospective cross-sectional study reviewed the paper medical records of children and adolescents (6-14 years) who visited family medicine and pediatric outpatient clinics (Jan-June 2012) in a medical city in Riyadh. Investigators calculated BMI percentiles (using height, weight, age and gender data retrieved from the records) in order to identify patient weight status. Physician documentation of obesity/overweight diagnoses in patient problem lists were cross checked against their BMI percentile to assess the accuracy of physicians' identification of weight status. The recommended management plan for identified patients was also recorded.

RESULTS

A total of 481 charts were reviewed, 213 (44%) children were seen by family medicine physicians and 268 (56%) by pediatricians. The sample was equally distributed by gender. Height was undocumented for 13% (71) of visiting patients. Eighteen percent of patients (86) were classified as overweight (35)/obese (51) according to age and sex adjusted BMI percentile. Physicians' correctly identified and documented weight status in 20% of overweight/obese patients: 17 out of 86 subjects. Weight status identification was higher among pediatricians-25% as compared to family medicine physicians-10% [p = 0.08]. Dietary referral was the most common management plan for the identified children. Physicians were more likely to identify obese children {≥95th} compared to overweight {≥85th - 95th} children. Subjects whose BMI for age classified them into the highest BMI percentile category {≥95th} were more likely to be correctly identified (29%) compared to those classified within {≥85th - 95th} category-6% [p = 0.007].

CONCLUSION

Physician identification of obesity/ overweight status for children and adolescents was low, irrespective of their specialty, and despite the condition being prevalent in the sample. Future research that concentrates on interventions that may improve documentation of obesity/overweight diagnoses and parameters needed for BMI indices would be beneficial.

A Review of Systematic Reviews Targeting the Prevention and Treatment of Overweight and Obesity in Adolescent Populations

PURPOSE

Adolescent obesity is a powerful predictor of morbidity and mortality, yet amenable to modifiable behaviors. To accurately summarize the effects of behavioral interventions on changes in adolescent body mass index and/or weight status, we assessed existing systematic reviews for reporting transparency and methodological quality.

METHODS

Five databases were searched through September 2017 to identify relevant systematic reviews. Reviews were evaluated for reporting transparency and methodological quality using PRISMA Reporting Checklist and Assessment of Multiple Systematic Reviews Instrument. Evidence was synthesized across high-quality reviews.

RESULTS

Four of twelve systematic reviews were of high methodological quality. All four focused on the treatment of overweight/obesity in adolescent populations, representing 97 international studies. Findings indicate intervention compared with no intervention/wait list showed larger effects for improving BMI/BMI z-scores. Small improvements (averaging a 3.7-kg decrease) in weight/weight percentile were observed following a supervised exercise plus dietary and/or behavior support intervention. Health-related quality of life may improve following interventions, but overall attention to associated psychological variables (depression, self-esteem/perception) is limited.

CONCLUSIONS

Adherence to objective checklists and protocols for rigorous conduct and reporting of systematic reviews is warranted. Consensus evidence is urgently needed to define and report behavior change interventions related to obesity prevention and treatment.

The impact of multicomponent weight management interventions on quality of life in adolescents affected by overweight or obesity: a meta-analysis of randomized controlled trials

Adolescents affected by overweight or obesity report similar quality of life to adolescents with cancer. While weight management is important for physiological outcomes, it is unclear whether weight management improves quality of life in this age group. This meta-analysis assessed the impact of multicomponent weight management interventions on quality of life in adolescents affected by overweight or obesity. Ovid PsycINFO, Ovid Medline, Ovid Embase, Cochrane Library, Scopus and CINAHL Plus databases were searched up to July 2017. Eight eligible studies were randomized controlled trials of multicomponent weight management interventions for adolescents (10 to 19 years) affected by overweight or obesity, with quality of life and weight measurements. Meta-analyses determined a positive effect on quality of life (mean difference 0.20 [0.11, 0.29]; p < 0.01) and weight (mean difference 0.30 [0.12, 0.47]; p < 0.01) following intervention. There was no correlation between weight loss and improvements in quality of life (R²  = 0.103). Rather than weight loss, intervention factors such as parental involvement, group settings and a focus on psychosocial well-being appeared linked to improvements in quality of life. The reduced quality of life reported by this group may be due to social consequences of obesity, rather than actual weight.

Sexual Orientation Differences in Adolescent Health Care Access and Health-Promoting Physician Advice

PURPOSE

Physician screening and advice on health-related behaviors are an integral part of adolescent health care. Sexual minority adolescents encounter more barriers to health services; yet, no prior research has examined whether they also experience disparity in physician screening and advice. We examined possible sexual orientation disparities in health care access, physician screening, and advice on six health-related behaviors.

METHODS

Data were from a national sample of U.S. adolescents who participated in wave 2 of the NEXT Generation Health Study (n = 2023). Poisson regressions were conducted separately for males and females to estimate sexual orientation differences in health care access and health-related screening and advice.

RESULTS

Compared with heterosexual males, sexual minority males were more likely to report unmet medical needs in the past year (adjusted relative risk [ARR] = 2.23) but did not differ with respect to receiving physician advice concerning health-related behaviors. Compared with heterosexual females, sexual minority females were more likely to report no routine physical checkup in the past year (ARR = 1.67) but were more likely to receive physician advice to reduce or stop drinking, smoking, drug use, increase physical activity, and improve diet (ARRs = 1.56-1.99), even after controlling for corresponding health-related behaviors. Sexual minority females were also more likely to receive advice about risk associated with sexual behavior (ARR = 1.35) and advice to avoid sexually transmitted diseases (ARR = 1.49).

CONCLUSIONS

Both sexual minority males and females experienced disparities in some aspects of health care access. Improved health-promoting advice would better serve sexual minority males.