The chronic disease of childhood obesity: the sleeping giant has awakened

Understanding bidirectional and transactional processes of child eating behaviours and parental feeding practices explaining poor health outcomes across infancy and early childhood in Australia: protocol for the Longitudinal Assessment of Children's Eating (LACE) study

INTRODUCTION

Child eating behaviours develop through interactions between the child's characteristics, psychological factors and the child's social environment and this affects the child's diet and weight. To examine the currently existing birth cohort studies examining child eating behaviours, a review was conducted. There are currently no birth cohorts that concurrently examine child eating behaviours, dietary intake, growth and parental feeding practices from birth into early childhood. Therefore, the primary objective of the Longitudinal Assessment of Children's Eating (LACE) study is to examine the bidirectional and transactional processes of child eating behaviours and parental feeding practices explaining poor dietary intake and excess weight across infancy and early childhood.

METHODS AND ANALYSIS

The LACE study will be a prospective, longitudinal parent-reported study following infants from younger than 4 months of age across nine waves of data collection: younger than 4 months, 4 months, 6 months, 9 months, 12 months, 18 months, 2 years, 3 years and 5 years. Participants will be included if they are parents of infants younger than 4 months, 18 years or older, fluent in English and living in Australia at baseline. A sample size of 1210 is proposed. Participants will be recruited online via paid social media (Facebook and Instagram) advertisements. The study will examine child eating behaviours, body mass index Z-score, dietary intake, screen time, temperament, parent feeding practices and styles, and demographics. The data will be obtained using the online survey software Qualtrics. Data analyses will be conducted using Stata.

ETHICS AND DISSEMINATION

Ethical approval was granted by the Deakin University Human Ethics Advisory Group, Faculty of Health (HEAG-H 120_2022). The findings from this study will be disseminated via presentations at scientific conferences and published manuscripts in peer-reviewed journals. Findings will be disseminated to the general public via mainstream media and to participants of the study with a summary of the findings.

Anthropometric assessment: ESPGHAN quality of care survey from paediatric hospitals in 28 European countries

OBJECTIVES

Assessment of anthropometric data is essential for paediatric healthcare. We surveyed the implementation of European Society of Paediatric Gastroenterology, Hepatology and Nutrition (ESPGHAN) evidence-based guidelines and practical recommendations on nutritional care, particularly regarding anthropometric measurements.

METHODS

Paediatric hospitals from 28 European countries provided pseudonymized data through online questionnaires on hospital characteristics and their standards of nutritional care. Practical tasks assessed an unbiased collection and reporting of anthropometric measurements in random patients' files and discharge letters.

RESULTS

Of 114 hospitals (67% academic), 9% have no nutritionist/dietitian available, 18% do not provide standard policy to assess weight and height and 15% lack training for nursing staff for accurate performance. A wall-mounted stadiometer to measure standing height and equipment for sitting weight is unavailable in 9% and 32%, respectively. Infant length is measured by one instead of two healthcare professionals and with a tape instead of a rigid length measuring board in 58% and 15% of hospitals, respectively. The practical tasks reviewed 1414 random patients, thereof 446 younger than 2 years of age. Missing documentation occurred significantly more often for height versus weight and their percentiles in infants ≤2 years versus older children, and in general paediatric versus gastrointestinal patients, with no difference between academic and nonacademic hospitals. Review of documented anthropometric data in discharge letters disclosed that consultants significantly underestimated the deficits in their units compared to documented data.

CONCLUSIONS

The survey revealed significant gaps in performance and documentation of anthropometry in the participating hospitals. A resurvey will assess changes in quality of care over time.

Childhood Obesity: An Updated Review

BACKGROUND

Childhood obesity is an important and serious public health problem worldwide.

OBJECTIVE

This article aims to familiarize physicians with the evaluation, management, and prevention of childhood.

METHODS

A PubMed search was conducted in May, 2021, in Clinical Queries using the key terms "obesity" OR "obese". The search included clinical trials, randomized controlled trials, case-control studies, cohort studies, meta-analyses, observational studies, clinical guidelines, case reports, case series, and reviews. The search was restricted to English literature and children. The information retrieved from the above search was used in the compilation of the present article.

RESULTS

Most obese children have exogenous obesity characterized by a growth rate for height above the 50th percentile, normal intelligence, normal genitalia, and lack of historical or physical evidence of an endocrine abnormality or a congenital syndrome. Obese children are at risk for dyslipidemia, hypertension, diabetes mellitus, non-alcoholic fatty liver disease, obstructive sleep apnea, psychosocial disturbances, impaired quality of life, and shorter life expectancy. The multitude of serious comorbidities necessitates effective treatment modalities. Dietary modification, therapeutic exercise, and behavioral modification are the fundamentals of treatment. Pharmacotherapy and/or bariatric surgery should be considered for obese individuals who do not respond to the above measures and suffer from a serious comorbid condition.

CONCLUSION

Childhood obesity, once established, is often refractory to treatment. Most treatment programs lead to a brief period of weight loss, followed by rapid re-accumulation of the lost weight after the termination of therapy. As such, preventive activity is the key to solving the problem of childhood obesity. Childhood obesity can be prevented by promoting a healthy diet, regular physical activity, and lifestyle modification. Parents should be encouraged to get involved in school and community programs that improve their children's nutritional status and physical activity.

Parenting style as a predictor of dietary score change in children from 4 to 14 years of age. Findings from the Longitudinal Study of Australian Children

OBJECTIVE

To examine associations between parenting style and changes in dietary quality score across childhood.

DESIGN

This longitudinal analysis included the child's frequency of consumption for twelve food and drink items reported by mothers of children (aged 4-8 years) and children (aged 10-14 years) during face-to-face interviews biennially. These items were combined into dietary scores based on the Australian Dietary Guidelines. Parenting styles were classified at baseline as authoritative, authoritarian, permissive and disengaged. Multilevel modelling was used to examine changes in diet quality score over time by maternal parenting styles.

SETTING

The Longitudinal Study of Australian Children.

PARTICIPANTS

A total of 4282 children aged 4 to 14 years.

RESULTS

Children's diet quality score declined over time between 4 and 14 years of age (β = -0·10, 95 % CI (-0·11, -0·08)). There was strong evidence to suggest that change in diet quality differed dependent on baseline maternal parenting style, although diet quality declined for all groups. Children with authoritative mothers had the greatest decline in diet quality score over time (β = -0·13; 95 % CI (-0·18, -0·08)), while children with disengaged mothers had the lowest decline (β = -0·03; 95 % CI (-0·07, 0·01)). However, it is important to note that children with authoritative mothers had a better dietary quality score than children of permissive or disengaged mothers for most of their childhood.

CONCLUSION

These findings question the previous assumptions that early exposure to an authoritative parenting style has lasting positive effects on the dietary intake of children.

Associations between feeding practices and child dietary quality, and the moderating effect of child eating behaviours on these associations

BACKGROUND

Parents' feeding practices are associated with children's food intake. Little is known about how children's eating behaviours (fussiness, enjoyment of food, food responsiveness, satiety responsiveness) moderate these associations. This study examines the relationships between feeding practices and pre-school children's dietary quality and whether children's eating behaviours moderate these relationships.

METHODS

In 2018, 1349 Australian mothers of children aged 2-5 years completed an online survey including validated measures of feeding practices (n = 9), child eating behaviours (n = 4) and dietary quality. Thirteen items from a food frequency questionnaire were summed as a measure of dietary quality. Linear regression assessed associations between feeding practices and dietary quality, including interactions between feeding practices and child eating behaviours.

RESULTS

The feeding practices positively associated with dietary quality were structured meal timing, monitoring, covert restriction, modelling healthy eating and structured meal setting (B coefficients: 0.63 to 2.70). The feeding practices inversely associated with dietary quality were overt restriction, persuasive feeding, reward for eating and reward for behaviour (B coefficients: -0.88 to -1.85). Child eating behaviours moderated associations between three feeding practices and dietary quality.

CONCLUSIONS

This exploratory study showed that some associations between feeding practices and child dietary quality were moderated by children's eating behaviours. The potential for tailoring nutrition promotion strategies for parents of children with differing eating behaviours should be further investigated.

The Association Between Obesity, Socio-Economic Status, and Neighborhood Environment: A Multi-Level Analysis of Spokane Public Schools

Socio economic inequities in obesity have been attributed to individuals' psychosocial and behavioral characteristics. School environment, where children spend a large part of their day, may play an important role in shaping their health. This study aims to assess whether prevalence of overweight and obesity among elementary school students was associated with the school's social and built environments. Analyses were based on 28 public elementary schools serving a total of 10,327 children in the city of Spokane, Washington. Schools were classified by percentage of students eligible for free and reduced meals (FRM). Crime rates, density of arterial roads, healthy food access, and walkability were computed in a one-mile walking catchment around schools to characterize their surrounding neighborhood. In the unadjusted multilevel logistic regression analyses, age, sex, percentage of students eligible for FRM, crime, walkability, and arterial road exposure were individually associated with the odds of being overweight or obese. In the adjusted model, the odds of being overweight or obese were higher with age, being male, and percentage of students eligible for FRM. The results call for policies and programs to improve the school environment, students' health, and safety conditions near schools.

Moderation of associations between maternal parenting styles and Australian pre-school children’s dietary intake by family structure and mother’s employment status

Objective

To examine associations between maternal parenting style and pre-school children’s dietary intake and to test whether perceived maternal time pressures, parenting arrangements and employment status influence these relationships.

Design

This cross-sectional study examined mothers’ reports of their child’s frequency of consumption of eight food and drink groups, including sugar-sweetened beverages (SSB), unhealthy snacks, takeaway foods, fruit and vegetables. Parenting styles were classified as authoritative, authoritarian, permissive or disengaged using two parenting dimensions (warmth and control). The moderating roles of parenting arrangements, indexed by number of parents in the home and maternal employment status, were assessed. Associations were examined using multinomial regression.

Setting

Data were from the infant and child cohorts in the Longitudinal Study of Australian Children.

Participants

Children aged 4–5 years from both cohorts (infant:n3607; child:n4661) were included.

Results

Compared with children of disengaged mothers, children of authoritative mothers consumed most unhealthy foods less frequently, and fruit and vegetables more frequently. Results suggested parenting arrangements and mothers’ working status may moderate associations between parenting styles and SSB, takeaway foods, takeaway snacks and fruit consumption.

Conclusions

These findings suggest that authoritative parenting style is associated with a higher consumption of fruit and vegetables and a lower consumption of unhealthy foods among children. However, parenting arrangements and the mothers’ working status may influence these relationships. Further research is required to examine the influence of other potential moderators of parenting style/food consumption relationships such as household time and resource limitations.

Systematic Review: Bullying Involvement of Children With and Without Chronic Physical Illness and/or Physical/Sensory Disability-a Meta-Analytic Comparison With Healthy/Nondisabled Peers

Objective

To compare levels of victimization and perpetration associated with bullying among children and adolescents with and without chronic physical illnesses and/or physical or sensory disabilities.

Methods

In total, 107 studies were identified using a systematic search in electronic databases and cross-referencing. A random-effects meta-analysis was computed.

Results

Children and adolescents with chronic physical illness or disability were more likely to be victims of bullying in general (odds ratio [OR] = 1.65), particularly physical bullying (OR = 1.47), relational bullying (OR = 1.47), verbal bullying (OR = 1.67), cyberbullying (OR = 1.39), and illness-specific teasing (OR = 5.29). They were also more likely to be bullies in general (OR = 1.28), as well physical (OR = 1.38) and relational bullies (OR = 1.13). The effect sizes varied across different illnesses and disabilities and, in part, by visibility of the disease, school type, and year of assessment.

Conclusions

Although most between-group differences tend to be small, some form of intervention is needed to reduce bullying among children and adolescents with chronic physical illnesses and/or physical or sensory disabilities, and illness-specific weight- and appearance-related teasing in particular.

Parental influences on weight-related health behaviors in western and eastern cultures

BACKGROUND

Excessive bodyweight contributes to a myriad of risk factors for chronic diseases, and multiple reports have demonstrated that parents influence the development of their children's behaviors that contribute to bodyweight. However, studies that include considerations for cultural influences are limited, and methodology that considers direct reports from young adults and their parents across cultures does not exist.

METHODS

A sample of young adults (N = 327) and their parents in the U.S. and in China were recruited and completed a series of questionnaires in two cycles (2010 and 2014). With correlation and multiple regression analyses, parents' characteristics, behaviors, and parental authority styles were examined and compared to weight-related health behaviors and bodyweight of their young-adult children. Additionally, similarities and differences of parental influences between the two cultures were explored.

RESULTS

Parents' body mass indexes (BMIs) and dietary behaviors were positively associated with those of their young adult children in the mixed-culture sample (P < .001 for both). When controlling for gender, at high levels of authoritarian and permissive parental authority, the relationships between young adults' and their parents' BMIs were negative for U.S. participants and positive for Chinese participants (P < .05 for both). Further, at high levels of authoritarian parenting, the relationship between young adults' and their parents' dietary consumption behaviors was negative for U.S. participants and positive for Chinese participants (P < .001).

CONCLUSIONS

This study provides evidence that the development of life-long health behaviors that contribute to BMI are significantly influenced by parents' behaviors and parenting styles. Moreover, an interaction of parental characteristics and cultural norms is indicated.

Physical Activity and Television Viewing Linked to Body Mass Index among Philippine High School Students: Signaling of an Emerging Epidemic of Obesity?

The major purpose of this study was to determine whether body mass index (BMI) was associated with reports of vigorous physical activity and television viewing among a sample of more than 3,000 Philippine high school students. In addition, the International Task Force on Obesity's new cutoff points to these adolescents' self-reports were applied to calculations of BMI based on self-reported height and weight in order to determine the prevalence of overweight and obesity among this sample of Filipino adolescents. Results showed that Filipino boys and girls who were the most frequent participants in vigorous physical activity (3 or more times a week) had significantly lower BMI when compared to those who were physically active less frequently. Conversely, Filipino boys and girls who viewed five or more hours of television during an average school day had significantly higher BMI than those who watched less television. The percentage of Philippine students in this study above the international cut offs for overweight (6.5 percent of boys and 5.7 percent of girls) and obesity (1.6 percent of boys and 1.8 percent of girls) was considerably lower than what has been found in studies of youth in developed Western nations. However, the adopting of Western lifestyle habits, including increased recreational inactivity (e.g., television viewing, video games, and surfing the Internet) and decreased participation in vigorous physical activity, could signal an emerging epidemic in this developing nation.

Mid-regional-pro-adrenomedullin plasma levels are increased in obese adolescents

PURPOSE

Recently, adrenomedullin (ADM) was defined as a new member of the adipokine family. ADM secreted by adipocytes, through its vasodilator and antioxidant actions, might be protective against metabolic syndrome-associated cardiovascular complications. The aim of the study was to assess plasma mid-regional (MR)-proADM levels in obese adolescents compared to normal-weight subjects and its relation with BMI, body composition and metabolic indices.

METHODS

Plasma MR-proADM was measured in 32 healthy adolescents [BMI z-score (mean ± SEM) = 0.6 ± 0.09 and 0.8 ± 0.07 in females and males, respectively] and in 51 age-matched obese adolescents [BMI z-score (mean ± SEM) = 2.8 ± 0.12 and 2.9 ± 0.08 in female and males, respectively] by a time-resolved amplified cryptate emission technology assay.

RESULTS

Plasma MR-proADM levels resulted significantly higher in obese than in normal-weight adolescents (MR-proADM: 0.33 ± 0.1 vs 0.40 ± 0.1 nmol/L, p < 0.0001). Using univariate analysis, we observed that MR-proADM correlated significantly with BMI z-score (p < 0.0001), fat mass (p < 0.0001), circulating insulin (p < 0.004), HOMA-IR (p < 0.005), total cholesterol (p < 0.03) and LDL-cholesterol (p < 0.05). Including MR-proADM as response variable and its significant correlates into a multiple regression analysis, we observed that fat mass (p = 0.014) and BMI z-score (p = 0.036) were independent determinants of circulating MR-proADM.

CONCLUSIONS

Our study shows for the first time that obese adolescents have higher circulating levels of MR-proADM compared with normal-weight, appropriate controls suggesting its important involvement in obese patients.

Ontario children have outgrown the Broselow tape

Objective:

The Broselow Pediatric Emergency Tape (Armstrong Medical Industries, Inc., Lincolnshire, IL) (BT) is a well-established length-based tool for estimation of body weight for children during resuscitation. In view of pandemic childhood obesity, the BT may no longer accurately estimate weight. We therefore studied the BT in children from Ontario in a large recent patient cohort.

Methods:

Actual height and weight were obtained from an urban and a rural setting. Children were prospectively recruited between April 2007 and July 2008 from the emergency department and outpatient clinics at the London Health Science Centre. Rural children from junior kindergarten to grade 4 were also recruited in the spring of 2008 from the Avon Maitland District School Board. Data for preschool children were obtained from three daycare centres and the electronic medical record from the Maitland Valley Medical Centre. The predicted weight from the BT was compared to the actual weight using Spearman rank correlation; agreement and percent error (PE) were also calculated.

Results:

A total of 6,361 children (46.2% female) were included in the study. The median age was 3.9 years (interquartile range [IQR] 1.56-7.67 years), weight was 17.2 kg (IQR 11.6-25.4 kg), and height was 103.5 cm (IQR 82-124.4 cm). Although the BT weight estimate correlated with the actual weight (r = 0.95577, p &lt; 0.0001), the BT underestimated the actual weight by 1.62 kg (7.1% ± 16.9% SD, 95% CI -26.0-40.2). The BT had an ≥ 10% PE 43.7% of the time.

Conclusions:

Although the BT remains an effective method for estimating pediatric weight, it was not accurate and tended to underestimate the weight of Ontario children. Until more accurate measurement tools for emergency departments are developed, physicians should be aware of this discrepancy.

Role of obesity in otitis media in children

The ongoing childhood obesity epidemic has garnered significant attention among healthcare providers due to its short- and long-term sequelae. Multiple diseases have been associated with obesity, not limited to hypertension, diabetes, and attention deficit hyperactivity disorder. Over the past decade, the relationships between obesity and otologic conditions have been investigated. In this setting, otitis media has remained the focus of research, representing one of the most common pediatric illnesses. Initial studies suggesting a relationship between the two conditions have been supported with epidemiological studies controlling for socioeconomic factors. The purpose of this article is to review our current understanding of the relationship between otitis media and obesity and to discuss the healthcare implications of this association. In addition, several identifiable factors associated with each condition are discussed, as are potential pathophysiologic mechanisms that may help to elucidate the complex and multifactorial relationship between the two disease entities.

Cancer incidence rates and trends among children and adolescents in the United States, 2001-2009

OBJECTIVES

Cancer continues to be the leading disease-related cause of death among children and adolescents in the United States. More current information is needed to describe recent cancer trends and identify demographic and geographic variations.

METHODS

We analyzed data from the National Program of Cancer Registries and Surveillance, Epidemiology, and End Results statewide registries representing 94.2% of the US population to identify cancers diagnosed among persons aged 0 to 19 years during 2001-2009. Age-adjusted rates and annual percentage change for trends were calculated. Data were stratified by age, gender, race, ethnicity, and geography.

RESULTS

We identified 120,137 childhood and adolescent cancer cases during 2001-2009 with an age-adjusted incidence rate of 171.01 per million. The overall rate of all cancers combined remained stable over time (annual percent change [APC], 0.3%; 95% confidence interval [CI], -0.1 to 0.7). There was an increase in the overall cancer trend among African American children and adolescents (APC, 1.3%; 95% CI, 0.2 to 2.5). An increasing trend for thyroid cancer was observed among both genders (APC, 4.9%; 95% CI, 3.2 to 6.6) and specifically among adolescents and those in the Northeast, South, and West regions of the United States. Renal carcinoma incidence was increasing significantly overall (APC, 5.4%; 95% CI, 2.8 to 8.1). Extracranial and extragonadal germ cell tumors and melanoma were both significantly decreasing.

CONCLUSIONS

This study reports the novel finding that renal carcinoma rates are increasing among children and adolescents. This study confirms that thyroid cancer rates are increasing and further describes rising cancer rates among African Americans.

The association of vitamin D status with cardiometabolic risk factors, obesity and puberty in children

Low serum 25-hydroxyvitamin D3 (25(OH)D) levels have been associated with insulin resistance and cardiovascular diseases. The influences of gender, puberty and adiposity on vitamin D status and the relationship between 25(OH)D and cardiometabolic risk factors in obese and non-obese children were studied. A retrospective analysis was carried out on 168 Turkish children during late winter. Age, gender, puberty, body mass index (BMI), 25(OH)D levels and cardiometabolic risk factors including lipid profiles, high-sensitivity C-reactive protein and insulin resistance index calculated by homeostasis model assessment (HOMA-IR) were evaluated. The median age of the study population was 11 (4-16) years, and 102 children (60.7 %) were prepubertal. Overall, 98.2 % of patients had 25(OH)D levels lower than 20 ng/mL (median 10.0 (4.0-21.3) ng/mL). The 25(OH)D levels did not correlate with BMI. However, an inverse correlation was seen between serum 25(OH)D and HOMA-IR (rho = -0.656, p = 0.006) and insulin (rho = -0.715, p = 0.002) in pubertal obese subjects. Female gender and puberty were all negatively associated with 25(OH)D.

CONCLUSION

The association between vitamin D status and BMI is complex, and it does not seem to be altered by mild obesity. In addition, potential influence of puberty should be kept in mind while assessing the relationship between serum 25(OH)D and cardiometabolic risk factors.

C-type natriuretic peptide plasma levels are reduced in obese adolescents

The high prevalence of obesity in children may increase the magnitude of lifetime risk of cardiovascular disease (CD). At present, explicit data for recommending biomarkers as routine pre-clinical markers of CD in children are lacking. C-type natriuretic peptide (CNP) is assuming increasing importance in CD; in adults with heart failure, its plasma levels are related to clinical and functional disease severity. We have previously reported five different reference intervals for blood CNP as a function of age in healthy children; however, data on plasma CNP levels in obese children are still lacking. Aim of this study was to assess CNP levels in obese adolescents and verify whether they differ from healthy subjects. Plasma CNP was measured in 29 obese adolescents (age: 11.8 ± 0.4 years; BMI: 29.8 ± 0.82) by radioimmunoassay and compared with the reference values of healthy subjects. BNP was also measured. Both plasma CNP and BNP levels were significantly lower in the obese adolescents compared to the appropriate reference values (CNP: 3.4 ± 0.2 vs 13.6 ± 2.3 pg/ml, p<0.0001; BNP: 18.8 ± 2.6 vs 36.9 ± 5.5 pg/ml, p=0.003). There was no significant difference between CNP values in males and females. As reported in adults, we observed lower plasma CNP and BNP levels in obese children, suggesting a defective natriuretic peptide system in these patients. An altered regulation of production, clearance and function of natriuretic peptides, already operating in obese adolescents, may possibly contribute to the future development of CD. Thus, the availability of drugs promoting the action of natriuretic peptides may represent an attractive therapeutic option to prevent CD.

Prevalence of hyperthyrotropinemia in obese children before and after weight loss

BACKGROUND

Obesity is a worldwide epidemic. In recent years, increasing attention has been focused on thyroid function in obesity.

OBJECTIVES

To establish the prevalence of elevated thyroid-stimulating hormone (TSH) levels in obese children and adolescents, and identify the relationship between TSH levels and other metabolic and hormonal variables before and after weight reduction.

MATERIALS AND METHODS

We evaluated 150 obese subjects (aged 3-17 years) for anthropometric, biochemical, metabolic and hormonal variables. Measurements were taken at baseline and, in a subgroup of children with hyperthyrotropinemia, after a 6-month intervention program based on exercise, behavior therapy, and nutrition education.

RESULTS

At baseline, 23 participants (15.3 %) had hyperthyrotropinemia, and 21 of these patients completed the weight reduction intervention. Among these 21 patients, 14 had substantial weight loss and a significant decrease in TSH and free T3 levels.

CONCLUSION

We conclude that TSH and T3 levels are significantly increased in childhood obesity; in most cases, however, these increases cannot be elucidated by thyroid autoimmunity or iodine deficiency. If thyroid disorders are excluded beforehand, an elevated TSH with normal thyroid hormone levels in obese children seems rather a consequence than a cause of obesity since weight loss leads to a normalization of elevated TSH levels. In this context, thyroid hormone alterations in obesity suggest an adaptation process.

Thyroid function in childhood obesity and metabolic comorbidity

Childhood obesity is a worldwide health problem and its prevalence is increasing steadily and dramatically all over the world. Obese subjects have a much greater likelihood than normal-weight children of acquiring dyslipidemia, elevated blood pressure, and impaired glucose metabolism, which significantly increase their risk of cardiovascular and metabolic diseases. Elevated TSH concentrations in association with normal or slightly elevated free T4 and/or free T3 levels have been consistently found in obese subjects, but the mechanisms underlying these thyroid hormonal changes are still unclear. Whether higher TSH in childhood obesity is adaptive, increasing metabolic rate in an attempt to reduce further weight gain, or indicates subclinical hypothyroidism or resistance and thereby contributes to lipid and/or glucose dysmetabolism, remains controversial. This review highlights current evidence on thyroid involvement in obese children and discusses the current controversy regarding the relationship between thyroid hormonal derangements and obesity-related metabolic changes (hypertension, dyslipidemia, hyperglycemia and insulin resistance, nonalcoholic fatty liver disease) in such population. Moreover, the possible mechanisms linking thyroid dysfunction and pediatric obesity are reviewed. Finally, the potential role of lifestyle intervention as well as of therapy with thyroid hormone in the treatment of thyroid abnormalities in childhood obesity is discussed.

Hyperthyrotropinemia in relation to endothelial dysfunction in obese adolescents

SUMMARY

BACKGROUND

It has been shown that isolated elevation of thyroid stimulating hormone (hyperthyrotropinemia) is quite frequent in obese adolescents, but it is not clear whether this condition entails an increased risk related to body mass index (BMI).

AIM

The aim of the current study was to investigate the relationship between hyperthyrotropinemia and endothelial dysfunction and other cardiovascular risk factors in obese adolescents.

METHODS

Seventeen obese adolescents with hyperthyrotropinemia (TSH ≥ 4.2 μUI/ml) (group 1), 21 obese adolescents with normal thyroid stimulating hormone (TSH) level (group 2) and 10 age- and sex-matched healthy lean controls were included in the study. Fasting blood glucose (FBG), lipid profile, insulin resistance (HOMA-IR) and thyroid hormones were determined. All participants were subjected to ultrasound recording of brachial artery diameter at rest and after reactive hyperemia (FMD) for assessment of endothelial function.

RESULTS

BMI and free triiodothyronine (fT3) levels were higher in obese adolescents with hyperthyrotropinemia (group 1) than in those with normal TSH (group 2) (p < 0.05), but there were no significant differences between the two groups in other metabolic parameters (lipid profile and HOMA-IR). The FMD was significantly low in obese adolescents (groups 1 and 2) relative to controls (3.4 ± 18% in group 1 and 3.6 ± 2.2% in group 2 vs. 10.4 ± 3.1% in control subjects), but there was no statistical difference between obese adolescents with hyperthyrotropinemia (group 1) and those with normal TSH (group 2). There were positive correlations between TSH and BMI (p = 0.03) and between fT3 and BMI (p = 0.04), but no correlation between TSH and lipid profile, HOMA-IR or FMD.

CONCLUSIONS

Hyperthyrotropinemia is not related to endothelial dysfunction or metabolic risk factors in obese adolescents.

The relationship between overweight and otitis media with effusion in children

OBJECTIVE

To assess the relationship between pediatric otitis media with effusion (OME) and body mass index (BMI).

METHODS

We assessed 140 children aged 2-7 years who underwent unilateral or bilateral ventilation tube insertion for treatment of OME (experimental group) and 190 children with no history of OME who underwent operations for conditions other than ear diseases during the same period. Each group was divided into four subgroups based on BMI by age and gender: underweight (BMI below normal limits; BMI ≤ 5 th percentile), normal (BMI within normal limits; 5th < BMI < 85th percentile), overweight (BMI over normal limits; 85 th ≤ BMI < 95th percentile) and obese ( BMI ≥ 95 th percentile). We explored differences in BMI, and serum triglycerides (TG) and total cholesterol (TC), between the experimental and control group, in comparison with values from those of standard body weight.

RESULTS

The prevalence of obesity was significantly higher in the experimental than in the control group (P<0.05). BMI, TG and TC did not, however, differ significantly between groups, according to standard body weight.

CONCLUSION

Pediatric obesity may have an effect on the development of OME, but pediatric overweight may be not associated with occurrence of OME.

Thyroid function derangement and childhood obesity: an Italian experience

BACKGROUND

In recent years, there has been an increasing attention to thyroid function in paediatric obese patients. In the present study we aimed 1) to determine the prevalence of abnormally elevated thyroid-stimulating hormone (TSH) levels in Italian obese children and adolescents 2) to investigate whether hyperthyrotropinemia in obese children cardiovascular and metabolic risk factors 3) to verify if TSH elevation is reversible after weight loss.

METHODS

We examined 938 obese children and adolescents (450 females). Anthropometric, metabolic and hormonal variables were determined at baseline and, in a subgroup of children with hyperthyrotropinemia, after a six month weight loss program.

RESULTS

Hyperthyrotropinemia (TSH >/=4.2 muUI/ml) was diagnosed in 120 patients (12,8%). Body mass index (BMI) z-score (p = 0.02) and free T3 (fT3) levels (p = 0.03) were higher in patients with elevated TSH compared to the group with normal TSH. There were not significant differences in other metabolic parameters between the two groups.A positive correlation between baseline TSH and BMI z-score (p = 0.0045) and between Ft3 and BMI z-score (p = 0.0034) was observed, while there was no correlation between TSH and lipids. Twenty-three patients among those with hyperthyrotropinemia who participated to weight reduction intervention (64 patients), presented substantial weight loss and concomitantly a significant decrease in TSH and in fT3.

CONCLUSIONS

These results suggest that: (1) a moderate elevation of TSH concentrations, is frequently found in obese children; (2) in obese children increase of TSH is not associated to metabolic risk factors, (3) hyperthyrotropinemia is reversible after weight loss and these data suggest that it should not be treated.

Rapid weight gain in children soon after diagnosis of type 1 diabetes: is there room for concern?

OBJECTIVE

To examine weight status in children at diagnosis (Dx) of type 1 diabetes and observe weight change post-Dx.

RESEARCH DESIGN AND METHODS

Data on 136 subjects (76 M/60 F) with type 1 diabetes diagnosed in 1998-2001 at Children's Hospital San Diego was obtained from Institutional Review Board (IRB)-approved database. All patients received two daily insulin injections (NPH/Regular) and were examined at least twice, up to 7 months post-Dx.

RESULTS

Average age at Dx (SD) was 9.02 yr (4.46)yr; 63.9% were Caucasian, 25% Mexican American (MA), 2.9% African American, 0.7% Asian, and 7.3% mixed. Diabetic ketoacidosis rate was more common in MA (44.1%) vs. Caucasians (20.9%) at Dx (p < 0.02). Average body mass index Z-score (BMI-Z) at Dx was -0.28 (39th percentile); 13.5% had BMI > or = 85th percentile, and 7.2% were obese. By 2 wk, and 15-41 d post-Dx, mean weight gain was 9% (5.9) and 12.8% (8), respectively. Mean A1C at Dx, 42-70 and 71-139 d later, was 11.4, 7.6, and 6.9%, respectively. Coinciding with improved glycemic control, by 10 wk, mean BMI-Z reached a plateau of 0.86 (80th percentile). On average, MA were heavier than Caucasians at Dx (p = 0.006), and remained heavier. By 71-139 d, 31.7% had BMI > or = 85th percentile and 15.9% were obese; 47.8% of 2- to 5-yr olds had BMI > or = 85th percentile vs. 22.6% nationally (p < 0.005) CONCLUSIONS: Despite the initial weight loss at Dx of type 1 diabetes, by 10-20 wk post-Dx, almost one third were overweight and obese, more so in MA. In light of the obesity epidemic, closer attention to overall caloric intake in children with new onset diabetes is prudent.

Pediatric nurse practitioners' assessment and management of childhood overweight/obesity: results from 1999 and 2005 cohort surveys

INTRODUCTION

Recently, public and professional emphasis has been placed on addressing the increasing prevalence of childhood overweight.

METHOD

This survey study was conducted with two cohorts of pediatric nurse practitioners (N = 413) to explore differences in self-reported practice skills over time.

RESULTS

Significant improvements in assessment, screening, and laboratory evaluations were reported, although reduced adherence to recommended psychosocial assessments was noted.

DISCUSSION

This study outlines self-reported barriers to effective childhood weight management. One support that participants requested was evidence-based guidelines. Motivational interviewing may be an additional strategy to enhance provider skills to assess and manage challenging patient behavior change (e.g., dietary and activity changes).

An evaluation of a weight-loss program incorporating E-learning for obese junior high school students

Obesity in adolescents is continuing to rise at an alarming rate and is becoming an important public health problem in Taiwan. Therefore, the aims of this study were (1) to evaluate the effectiveness of a Weight-loss E-learning Program (WEP) on obese Chinese adolescents and (2) to gauge this group's satisfaction with the WEP. The design was quasi-experimental, using purposive samples from two junior high schools in Taipei, Taiwan. Obese adolescents between 12 and 14 years of age with body mass indexes (BMI) over 25 kg/m2 were recruited. A 14-week WEP was developed to expedite weight loss for the selected adolescents. Data such as BMI, waist-to-hip ratio, waist circumference, hip circumference, mid-arm circumference, triceps skinfold, blood pressure, and physical fitness were collected through standardized instruments and methods before and after the WEP. The satisfaction of the subjects and four psychosocial variables were evaluated and taken into account by authoritative scales and questionnaires. In total, 37 adolescents participated in this study. After the WEP, we found significant decreases in BMI (p < 0.05), waist circumference (p < 0.05), and triceps skinfold (p < 0.001) in the sample population. Improvements were found in three of four tests of physical fitness (p < 0.001, p < 0.05, and p < 0.01, respectively). All psychosocial variables showed significant favorable changes (p < 0.01 for self-esteem scores, p < 0.001 for the other three variables) and satisfaction levels for the WEP ranged from 56.6% to 83.8% in four different criteria. The WEP was effective in helping obese Chinese adolescents lose weight. However, there is still room for improvement.

High-normal fasting glucose levels are associated with increased prevalence of impaired glucose tolerance in obese children

The natural history of impaired glucose tolerance (IGT) and Type 2 diabetes among obese children is not clear. Although the cut-off for impaired fasting glucose (IFG) has recently been changed from 110 (6.1 mmol/l) to 100 mg/dl (5.6 mmol/l), it does not seem a reliable way to find all subjects with impaired glucose homeostasis. The aim of our study was to determine whether high-normal fasting glucose level could predict the occurrence of IGT and metabolic syndrome. Three hundred and twenty-three Italian obese children and adolescents were included in the study (176 females, mean age 11+/-2.9 yr; mean body mass index z-score: 3+/-0.6). Waist circumference, serum glucose, insulin, triglyceride, cholesterol HDL, blood pressure were evaluated and an oral glucose tolerance test (OGTT) was performed. The prevalence of IFG and IGT were respectively 1.5% (5 subjects) and 5% (18 patients); no diabetic patients were found. Metabolic syndrome was diagnosed in 20% of patients. Fasting glycemia values <100 mg/dl (5.6 mmol/l) have been divided in quintiles. Metabolic syndrome prevalence increased across quintiles, although not in a statistically significantly manner, but it could depend on the selected diagnostic criteria as no univocal definition exists for metabolic syndrome in youths. Interestingly high-normal fasting plasma glucose levels constitute an independent risk factor for IGT among obese children and adolescents; therefore, this very easy-to-use parameter may help to identify obese patients at increased risk of diabetes or at least could suggest in which subjects to perform an OGTT.

Morbidity of overweight (>or=85th percentile) in the first 2 years of life

OBJECTIVES

Our hypothesis was that morbidity related to overweight/obesity is already evident in infants and young toddlers. The major objectives of this study were (1) to assess the prevalence of overweight in a sample of hospitalized infants and (2) to assess the prevalence of morbidity in overweight infants in a community-based sample.

METHODS

The hospital admission study population included 2139 infants, <or=24 months of age, who were admitted for any reason to the pediatric department at the Bnai Zion Medical Center in 2004-2005. For the community-based sample, we identified overweight infants (>or=85th weight-for-height percentile in >or=2 measurements, >or=3 months apart), <or=24 months of age, in 8 mother and child health care facilities in the Haifa subdistrict of Israel. Parents of infants were interviewed by using a structured questionnaire.

RESULTS

We found that overweight infants (85th to 94th percentiles) had fewer admissions and fewer repeated admissions than expected. Infants of >or=95th percentile had more admissions than expected, as well as a larger number of repeated admissions. In the second part of the study, we found that rates of developmental delays (mainly delayed gross motor skills) and snoring were significantly higher in infants of >or=85th percentile. In addition, although the results were not statistically significant, infants with overweight suffered more frequently from breathing problems, such as asthma and stridor. When the mothers were asked to assess whether their child was overweight, only 31.6% of mothers of overweight children thought that the child was overweight.

CONCLUSIONS

The high admission rates for infants of >or=95th percentile and the high incidence rates of respiratory morbidity, snoring, and delayed gross motor skills in overweight infants support our hypothesis regarding early morbidity associated with overweight.

Incidence and prevalence of abnormal liver associated enzymes in patients with atrial fibrillation in a routine clinical care population

The prevalence of elevated liver enzymes has not been described in patients with atrial fibrillation (AF) who may be more likely to develop these abnormalities due to comorbidities and medications. As signals of liver injury lead to termination of drug development programs, an attempt to better define the background prevalence would aid in interpreting these elevations in the setting of exposure to a new drug. The aim of this study was to estimate the prevalence and incidence of alanine aminotransferase (ALT) elevations in a cohort with AF.

METHODS

Retrospective cohort of patients with AF using the outpatient medical record of the University of Pennsylvania Health System (UPHS). Primary outcomes were prevalence and incidence of ALT elevations (>40 U/L). We also examined the prevalence of risk factors for ALT elevations.

RESULTS

Liver enzymes were measured at least once in 1630 of 2151 patients (76%). The prevalence of ALT >40 U/L was 27.6% (95%CI 25.7-29.5%). The incidence of new ALT elevations was 14.5/100 person-years (95%CI 13.0-16.1) for ALT > 40 U/L and 2.1/100 person-years (95%CI 1.6-2.8) for ALT elevations above twice the upper limit of normal (ULN). New persistent ALT elevations above twice the ULN were identified in 0.2% of patients.

CONCLUSION

Elevated ALT is common among patients with AF, although new and persistent elevation greater than twice the ULN is uncommon. In the setting of a new drug, these factors make it difficult to delineate drug-induced liver injury from incident elevations due to comorbidities.

Prevalence of elevated alanine aminotransferase among US adolescents and associated factors: NHANES 1999-2004

BACKGROUND & AIMS

Nonalcoholic fatty liver disease (NAFLD) is a common cause of liver disease in children and adolescents. The majority of studies of NAFLD in children have been in select populations of the clinically obese. Study aims were to estimate the prevalence of elevated alanine aminotransferase (ALT, as a marker of NAFLD) in a general contemporary adolescent population and to identify leading risk factors for ALT elevation (>30 U/L).

METHODS

We analyzed data of adolescent participants (aged 12-19 years; N = 5586) in the National Health and Nutrition Examination Survey 1999-2004, a representative sample of the civilian noninstitutionalized US population.

RESULTS

The prevalence of elevated ALT levels (>30 U/L) was 7.4% among white adolescents, 11.5% among Mexican American adolescents, and 6.0% among black adolescents. Elevated ALT levels were prevalent in 12.4% of male subjects compared with 3.5% of female subjects. Multivariable associations with elevated ALT levels were found for sex (odds ratio [OR] male vs female, 7.7; 95% confidence interval [CI], 3.9-15.1), ethnicity (OR black vs white, 0.6; 95% CI, 0.3-1.3; OR Mexican American vs white, 1.6; 95% CI, 1.0-2.6), waist circumference (OR per 1 SD, 1.4; 95% CI, 1.0-2.0), and fasting insulin level (OR per 1 SD, 1.6; 95% CI, 1.2-2.1). Age, C-reactive protein levels, and triglyceride levels were also positively and socioeconomic position inversely associated with elevated ALT levels. The magnitude of associations were similar across ethnic groups.

CONCLUSIONS

ALT level is associated with waist circumference and insulin resistance even in a young population. These characteristics could be utilized to identify adolescents who may benefit from screening for NAFLD, offering an opportunity to prevent disease progression at an early age.

Anthropometric, bone age, and bone mineral density changes after a family-based treatment for obese children

Our objective was to identify anthropometric, bone age, and bone mineral density (BMD) changes after a family-based treatment program for obese children. We conducted a longitudinal prospective study of 50 obese children (body mass index percentage [BMI%] > or =120%) aged 9.12 +/- 1.72 years (range 6-13) at baseline. A family-based treatment program, based on inadequate feeding style with progressive modification, aerobic physical exercise increase, active parental involvement, and the use of behavioural strategies (contracting, self-monitoring, social reinforcement), was developed during a 12-month period. Anthropometric data, lumbar spine (L2-L4) BMD by dual-energy X-ray absorptiometry, bone age (BA), bone age to chronological age ratio (BA/CA), and predicted adult height (PAH) were determined at baseline and 12 months. The statistical method used was analysis of variance and the paired Student t-test. Mean BMI standard deviation score (SDS) loss was -0.61 +/- 0.76 and BMI% loss was -5.17 +/- 9.73%. Height SDS significantly decreased, BA/CA ratio also decreased significantly, and PAH change was not significant. Lumbar spine BMD SDS and BMD% did not significantly change. A family-based treatment program was effective in obese children by reducing by 5% the BMI in 1 year and increasing the activity level. Treatment reduced growth velocity and delayed bone maturation rate without affecting PAH, reflecting a situation of previous early maturation. The treatment did not modify gaining bone mass.

Prevalence of overweight/obesity in Chinese children

BACKGROUND

The purpose of this paper was to report the prevalence of overweight/obesity by area, age, and gender in the year 2000 and to explore at what age adiposity rebound as measured by BMI occurs for Chinese children.

METHODS

A cross-sectional study was carried out among 262,738 children aged 3.5-6.4 years in 26 counties/cities in China. Weight and height were measured from March 2000 through July 2000 by local trained health workers. International age- and gender-specific BMI cut-off points were used to obtain comparable prevalence rates of overweight/obesity. Multiple logistic regression was used to estimate odds ratios (OR) of being overweight/obesity for different comparisons.

RESULTS

There were 19,390 overweight (16,738) or obese (2,652) children, resulting in an overall prevalence rate of 7.4% (95% CI: 7.3-7.5%). Girls were more likely to be overweight or obese than boys (OR = 1.14, 95% CI: 1.11-1.17). Compared with children living in the southern urban area, multivariate ORs for those living in northern rural and southern rural areas were 2.58 and 1.15, respectively. Compared with children aged 6.0-6.4 years old, multivariate ORs for children aged 3.5, 4.0, 4.5, 5.0 and 5.5 years were 1.96, 1.88, 1.56, 1.53, and 1.11, respectively (p<0.001).

CONCLUSIONS

Childhood overweight/obesity in Chinese children in 2000 is similar to the conditions of Great Britain or the U.S. in the 1980s or earlier. Age at adiposity rebound as measured by BMI for Chinese children is >6.5 years old.

Laparoscopic adjustable gastric banding in adolescent: safety and efficacy

BACKGROUND

Obesity prevalence is rapidly increasing among children and adolescents worldwide. It is considered one of the most alarming public health issues facing the world today. The adult experience has demonstrated that surgery is the only effective means of achieving persistent weight loss in obese patients. However, little is known about bariatric surgery in children and adolescents. The aim of this study is to evaluate the safety and efficacy of laparoscopic adjustable gastric banding (LAGB) in this group of patients.

METHODS

A retrospective review included all children and adolescents who underwent LAGB from January 2003 to December 2005.

RESULTS

Fifty-one patients underwent LAGB. The mean age was 16.8 years (range, 9-19), and the mean body mass index was 49.9 kg/m2 (range, 38-63). Mean excess weight loss was 42% at 6 months and 60% at 1 year follow-up. The most prevalent comorbidities were obstructive sleep apnea, limited physical activities, hypertension, and diabetes mellitus. Band adjustments were performed under fluoroscopic guidance in 5 patients and direct access as a clinic procedure in the remaining. One patient required port repositioning under fluoroscopic guidance. The mean follow-up was 16 months (range, 3-34). There was no mortality or significant postoperative complications.

CONCLUSION

The absence of significant nutritional deficiency, the continued adjustability, and potential reversibility of LAGB make it the safest, least invasive, and most effective bariatric surgery that can be offered to the young and adolescent population.

Effect of the melanocortin-3 receptor C17A and G241A variants on weight loss in childhood obesity

BACKGROUND

The central melanocortin system is critical for the long-term regulation of energy homeostasis. Melanocortin-3 receptor (MC3R) knock-out mice, despite being hypophagic, have increased fat mass and higher feed efficiency than do their wild-type littermates.

OBJECTIVE

The aim was to evaluate whether, in childhood obesity, MC3R variants are associated with changes in fatness reduction as a consequence of a weight-reduction program.

DESIGN

Molecular screening of the MC3R coding region in 184 obese children, 77 girls and 107 boys [x (+/-SEM) body mass index (BMI; in kg/m(2)) z score: 3.3 +/- 2.3; age 9.2 +/- 2 y], was performed. BMI was evaluated at baseline and after 6 and 12 mo of the weight loss program.

RESULTS

No new mutations were found. Two previously described polymorphisms, C17A (Thr6Lys) and G241A (Val81Ile), were observed in 20 patients in almost complete linkage disequilibrium. No significant differences in BMI z scores were observed at baseline of the weight-loss program between the genotypes; however, at follow-up, heterozygotes showed a significantly higher BMI z score (P = 0.03). When the patients were divided according to the amount of weight lost, a higher prevalence of heterozygotes was observed among subjects who lowered their BMI z score <1.5 (P = 0.03).

CONCLUSION

These results suggest a gene-diet interaction between the MC3R C17A and G241A variants and a weight loss program for the ability to lose weight in childhood obesity.

Children, adolescents, and advertising

Advertising is a pervasive influence on children and adolescents. Young people view more than 40,000 ads per year on television alone and increasingly are being exposed to advertising on the Internet, in magazines, and in schools. This exposure may contribute significantly to childhood and adolescent obesity, poor nutrition, and cigarette and alcohol use. Media education has been shown to be effective in mitigating some of the negative effects of advertising on children and adolescents.

Weight loss in obese children carrying the proopiomelanocortin R236G variant

To acquire more information relative to the course of obesity in conditions of food restriction in subjects carrying mutations in the melanocortin signaling pathway, 710 obese children (mean age: 9.5+/-2.1 yr; mean z-score body mass index: 3.63+/-1.6) were genotyped for the proopiomelanocortin (POMC) R236G substitution, a variant which has been associated to early onset obesity, by restriction fragment length polymorphism (RFLP) analysis. Three children were heterozygotes for the R236G variant (0.4%). One of them had the metabolic syndrome. This variant was not found in 400 controls. The 3 probands followed a hypocaloric balanced diet and, after about 12 months, normalized their weight as well as fat mass and insulin resistance. The patient with the metabolic syndrome reversed this condition. These results show that a) the R236G substitution of POMC gene, although not a major cause of obesity among Italian obese children and adolescents, is associated with early onset obesity, and that b) inherited alterations of the melanocortin signaling pathway, independently of the degree of obesity, do not preclude the possibility to lose weight in mutated individuals following a hypocaloric diet.

Understanding the development and prevention of type 2 diabetes in youth (part 1)

The prevalence of being at risk of overweight, overweight, pre-diabetes, and type 2 diabetes is increasing in the United States in youth. Primary care providers must understand how the emerging epidemic of type 2 diabetes developed during the past several decades to accurately diagnose it in young patients. Primary, secondary, and tertiary prevention interventions are needed to address the emerging epidemic of type 2 diabetes in youth. Primary prevention involves delaying the development of type 2 diabetes by reducing the prevalence of overweight. Secondary prevention is aimed at preventing those with pre-diabetes from developing diabetes, and tertiary prevention is aimed at preventing the complications of type 2 diabetes.

Obesity and asthma, what are the links?

PURPOSE OF REVIEW

Obesity is a major cause of morbidity accounting for approximately 300 000 deaths each year and about 7% of the health care budget with an economic impact greater than US dollar 100 billion annually in the United States. Obesity and its sequelae such as cardiovascular disease, diabetes, arthritis or cancer have been on the rise over the last decades. The parallel time trend with an increasing prevalence of asthma has induced a lively debate about a potential link between both conditions.

RECENT FINDINGS

A number of prospective studies have shown that weight gain can antedate the development of asthma. Effect modification by sex may occur as some studies have shown effects of body mass index on asthma only among females. However, sex differences are not consistent. Several hypotheses have been proposed to explain the epidemiological associations including alterations in airway mechanics and immune responses, hormonal influences and genetic factors.

SUMMARY

There is evidence that obesity and overweight are associated with the development of asthma. Yet, the mechanisms underlying this relation are unclear. Weight reduction among asthmatic patients can result in improvements of lung function demonstrating the potential clinical impact of the findings.

Screening and interventions for childhood overweight: a summary of evidence for the US Preventive Services Task Force

BACKGROUND

Childhood and adolescent overweight and obesity are related to health risks, medical conditions, and increased risk of adult obesity, with its attendant effects on morbidity and mortality rates. The prevalence of childhood overweight and obesity has more than doubled in the past 25 years. Purpose. This evidence synthesis examines the evidence for the benefits and harms of screening and early treatment of overweight among children and adolescents in clinical settings.

METHODS

We developed an analytic framework and 7 key questions representing the logical evidence connecting screening and weight control interventions with changes in overweight and behavioral, physiologic, and health outcomes in childhood or adulthood. We searched the Cochrane Library from 1996 to April 2004. We searched Medline, PsycINFO, DARE, and CINAHL from 1966 to April 2004. One reviewer abstracted relevant information from each included article into standardized evidence tables, and a second reviewer checked key elements. Two reviewers quality-graded each article with US Preventive Services Task Force criteria.

RESULTS

Although BMI is a measure of relative weight rather than adiposity, it is recommended widely for use among children and adolescents to determine overweight and is the currently preferred measure. The risk of adult overweight from childhood overweight provides the best available evidence to judge the clinical validity of BMI as an overweight criterion for children and adolescents. BMI measures in childhood track to adulthood moderately or very well, with stronger tracking seen for children with >or=1 obese parent and children who are more overweight or older. The probability of adult obesity (BMI of >30 kg/m(2)) is >or=50% among children >13 years of age whose BMI percentiles meet or exceed the 95th percentile for age and gender. BMI-based overweight categorization for individuals, particularly for racial/ethnic minorities with differences in body composition, may have limited validity because BMI measures cannot differentiate between increased weight for height attributable to relatively greater fat-free mass (muscle, bone, and fluids) and that attributable to greater fat. No trials of screening programs to identify and to treat childhood overweight have been reported. Limited research is available on effective, generalizable interventions for overweight children and adolescents that can be conducted in primary care settings or through primary care referrals.

CONCLUSIONS

BMI measurements of overweight among older adolescents identify those at increased risk of developing adult obesity. Interventions to treat overweight adolescents in clinical settings have not been shown to have clinically significant benefits, and they are not widely available. Screening to categorize overweight among children under age 12 or 13 who are not clearly overweight may not provide reliable risk categorization for adult obesity. Screening in this age group is compromised by the fact that there is little generalizable evidence for primary care interventions. Because existing trials report modest short- to medium-term improvements (approximately 10-20% decrease in percentage of overweight or a few units of change in BMI), however, overweight improvements among children and adolescents seem possible.

Quality of life in pediatric patients with asthma with or without obesity: a pilot study

BACKGROUND

In addition to the increased incidence of asthma, obesity in asthmatic children is also on the rise. Several studies have been performed to determine whether obesity could be a risk factor for asthma, but this association has not been demonstrated in all patients. The Pediatric Asthma Quality of Life Questionnaire (PAQLQ) is a standardized and validated tool for use in the pediatric population, which evaluates the effect of asthma on patients' daily activities.

METHODS AND RESULTS

To determine the effect of obesity and overweight on quality of life, the PAQLQS was applied to 100 pediatric patients with intermittent asthma and mild persistent asthma and obesity, overweight and normal weight. The results of the three dimensions evaluated in the questionnaire (emotions, symptoms and limitation of activities) showed significant differences in quality of life in the obese asthmatic group only (p < 0.000). No differences were found when the groups with and without overweight were compared.

CONCLUSIONS

The PAQLQ revealed a significant difference in the quality of life in obese asthmatic patients. Overweight and normal weight had no effect quality of life.

Identification, evaluation, and management of obesity in an academic primary care center

BACKGROUND

The rapidly increasing prevalence of obesity among children is one of the most challenging dilemmas facing pediatricians today. While the medical community struggles to develop effective strategies for the treatment of this epidemic, timely identification of obesity by pediatric health care providers remains the crucial initial step in the management of obesity.

OBJECTIVE

Direct assessment of pediatric clinicians' performance in identifying and managing obesity in clinical practice has not been conducted to date. The objective of this study was to determine rates of identification of obesity by pediatric residents, nurse practitioners, and faculty members in an academic primary care setting and to describe the actions taken by these providers in their evaluation and management of obesity.

DESIGN

A retrospective medical record review of all health supervision visits for children 3 months to 16 years of age, examined between December 1, 2001, and February 28, 2002, was performed. For children <5 years of age, a weight >120% of the 50th percentile of weight-for-height was defined as obese. For children > or =5 years of age, a body mass index of >95th percentile for age and gender was defined as obese.

SETTING

A large, primary care practice located in a tertiary-care, academic, pediatric hospital, which serves a predominantly urban, minority (70% African American), Medical Assistance-insured (90%) population.

PARTICIPANTS

Primary care providers, including pediatric residents, nurse practitioners, and faculty physicians.

RESULTS

Of the 2515 visits reviewed, a total of 244 patients met the study definition of obesity, yielding an estimated prevalence of obesity visits of 9.7% among health supervision visits for children 3 months to 16 years of age. This prevalence of obesity visits cannot be used to estimate the population prevalence of obesity, given the skewed distribution of visits toward very young children. For all children who met the study definition of obesity, providers documented obesity in their assessments in only 53% of the reviewed visits (129 visits). Although the majority of charts (69%) contained an adequate dietary history, only 15% included a description of the child's activity level or television viewing. Obesity was noted in the physical examination in 39% of cases. For children for whom obesity was identified as a problem by their clinicians (129 patients), 81% of charts contained an adequate dietary history, whereas 27% contained a description of the child's activity level or television viewing. Obesity was noted in the physical examination in 64% of cases. Most children identified as obese by their providers received some management specific to their obesity, including education, screening, and specialist referral. Dietary changes were recommended for 71%, increased activity for 33%, and limitation of television viewing for only 5%. Eighty-three percent of providers recommended close follow-up monitoring. Other recommendations included referral to a dietitian (22%), screening laboratory studies (13%), a food diary (9%), endocrine referral (5%), or preventive cardiology referral (3%). Provider identification of obesity was affected by the age of the patient and by the degree of obesity. Obesity identification was lowest among preschool children (31%) and highest among adolescent patients (76%). Providers evaluating older and heavier children were also more likely to obtain activity histories, note obesity in the physical examination, recommend changes in activity, refer the patient to a nutritionist, obtain screening laboratory studies, and recommend close follow-up monitoring. Identification of obesity and other outcome variables were not significantly influenced by the level of provider training or patient gender.

CONCLUSIONS

Although the prevalence of childhood obesity has now reached epidemic proportions, it was under-recognized and under-treated by pediatric primary care providers in our study. Providers identified obesity as a problem for only one-half of the obese children examined for health supervision. The lowest rates of obesity identification occurred among children <5 years of age and those with milder degrees of obesity. Identification did not improve with additional years of pediatric training. Even for the subset of children identified as obese by their providers, evaluation and treatment often were not consistent with current recommendations. For example, more attention was given to the role of diet, compared with activity, in the evaluation of obesity. In particular, only a small number of providers (5%) recommended a decrease in television viewing to their obese patients, despite evidence linking television viewing and pediatric obesity. This finding is of concern, because obesity is known to be a multifactorial disease that responds only to significant changes in both dietary and activity behaviors. Only 13% of providers requested laboratory studies as part of their recommendations. The American Academy of Pediatrics currently recommends obtaining a lipid profile, total cholesterol level, and screening test for type 2 diabetes mellitus as part of the evaluation of obesity. The majority of clinicians who requested laboratory studies included thyroid function tests, which are not recommended by the American Academy of Pediatrics because of the very low likelihood of hypothyroidism as a cause of obesity. Although the extent of evaluation and management for children who were recognized as obese did not meet current guidelines, it was far better than that for patients who were not identified as obese by their providers. This demonstrates the importance of timely identification as the crucial initial step in the management of obesity. The results of this study are disheartening, especially as evidence mounts regarding the importance of early intervention in preventing the medical and psychosocial sequelae of obesity, as well as the persistence of obesity into adulthood. This study highlights the need for increased awareness and identification of obesity in the primary care setting, especially among younger children and those with mild obesity.

Metabolic, antioxidant, nutraceutical, probiotic, and herbal therapies relating to the management of hepatobiliary disorders

Many nutraceuticals, conditionally essential nutrients, and botanical extracts have been proposed as useful in the management of liver disease. The most studied of these are addressed in terms of proposed mechanisms of action, benefits, hazards, and safe dosing recommendations allowed by current information. While this is an area of soft science, it is important to keep an open and tolerant mind, considering that many major treatment discoveries were in fact serendipitous accidents.

Molecular screening of the ghrelin gene in Italian obese children: the Leu72Met variant is associated with an earlier onset of obesity

OBJECTIVE

To test whether ghrelin variants could play a role in modulating some aspects of the obese phenotype during childhood.

DESIGN

We screened the ghrelin gene in 300 Italian obese children and adolescents (mean age 10.5+/-3.2 y; range 4-19 y) and 200 controls by using the single-strand conformation polymorphism and the restriction fragment length polymoprhism analysis.

RESULTS

No mutations were detected with the exception of two previously described polymorphisms, Arg51Gln and Leu72Met. For both variations, allelic frequencies were similar between patients and controls. Interestingly, we showed that the Leu72Met polymorphism was associated with differences in the age at obesity onset. Patients with the Met72 allele became obese earlier than homozygous patients for the wild Leu72 allele. The logrank test comparing the plots of the complement of Kaplan-Meier estimates between the two groups of patients was statistically significant (P<0.0001).

CONCLUSION

It is unlikely that ghrelin variations cause the obesity due to single-gene mutations. The Leu72Met polymorphism of the ghrelin gene seems to play a role in anticipating the onset of obesity among children suggesting, therefore, that ghrelin may be involved in the pathophysiology of human adiposity.

Vitamin E treatment in pediatric obesity-related liver disease: a randomized study

OBJECTIVE

A beneficial role of antioxidants in hepatopathic obese individuals has hitherto been inferred only from uncontrolled pilot studies. The authors compared the effect of vitamin E and weight loss on transaminase values and on ultrasonographic bright liver in a controlled group of children with obesity-related liver dysfunction.

METHODS

Twenty-eight children with obesity-related hypertransaminasemia and bright liver were randomly allocated to two single-blind groups: group 1 (n = 14) treated with a low-calorie diet associated with oral placebo for 5 months, and group 2 (n = 14) treated with a low-calorie diet associated with oral vitamin E (400 mg/d x 2 months, 100 mg/d x 3 months). Transaminase values and ultrasonographic liver brightness along with weight loss and vitamin E levels were monitored.

RESULTS

Variations in transaminase levels and percentage of patients with normalized transaminase values were comparable in the two groups. The disappearance of bright liver was observed only in patients who lost weight and was twice as common in patients from group 1. Two subgroups of patients with complete normalization of transaminase values emerged as a consequence of controlled adherence to diet alone (n = 6; significant decrease of percent overweight: P = 0.0019 ) and to vitamin E alone (n = 7; unmodified percent overweight and significant increase of vitamin E/cholesterol ratio: P < 0.0001). Changes in treatment-induced alanine aminotransferase levels in these two subgroups were comparable at month 2, whereas values at month 5 were significantly lower in the subgroup adherent to diet alone (P = 0.04). In the subgroup adherent to vitamin E alone, after 2 months washout, transaminase remained stable in 5 patients and increased in 2; bright liver persisted in all.

CONCLUSIONS

Oral vitamin E warrants consideration in obesity-related liver dysfunction for children unable to adhere to low-calorie diets.

Health consequences of obesity

The recent epidemic of childhood obesity(1) has raised concern because of the possible clinical and public health consequences.(2,)(3) However, there remains a widespread perception among health professionals that childhood obesity is a largely cosmetic problem, with minor clinical effects. No systematic review has yet focused on the diverse array of possible consequences of childhood obesity, though older non-systematic reviews are available.(4,)(5) In addition, no review to date has considered the vast body of evidence on the health impact of childhood obesity which has been published recently. The aim of the present review was therefore to provide a critically appraised, evidence based, summary of the consequences of childhood obesity in the short term (for the child) and longer term (in adulthood).

Early determinants of childhood overweight and adiposity in a birth cohort study: role of breast-feeding

BACKGROUND

The prevalence of adiposity in childhood is increasing. Is breast-feeding protective as suggested by cross-sectional studies?

OBJECTIVE

In a longitudinal birth cohort study, we tested whether breast-feeding for more than 2 months has preventive effects against overweight and adiposity at 6 y.

DESIGN

Of 1314 children representing the catchment areas of six delivery units, 918 could be followed up to the age of 6 y. Height, weight, and skin-fold thickness were measured at regular visits. As the criteria of overweight, obesity, and adiposity in the children, the 90th and the 97th percentiles of BMI and skin-fold values were used. Parents with a BMI at or above the 90th percentile, which was 27 kg/m(2) or more, were considered overweight. Infants bottle-fed from birth or breast-fed for less than 3 months were classified as 'bottle-fed' (BO), and those breast-fed for 3 months and more as 'breast-fed' (BR). Univariate comparisons and logistic regression analysis were performed applying SAS 6.12. The final logistic model consisted of the 480 cases for whom complete data for all variables were available. The potential effect of loss to follow-up was analysed by the Cochran-Mantel-Haenzel test: the outcomes were not significantly influenced by loss to follow-up.

RESULTS

At birth BMIs were nearly identical in both groups. By 3 months, BO had significantly higher BMIs and thicker skin folds than BR. From 6 months on, compared to BR, a consistently higher proportion of BO children exceeded the 90th and the 97th percentile of BMI and skin-fold thickness reference values. From the age of 4 y to 5 and 6 y, in BO the prevalence of obesity nearly doubled and tripled, respectively. With only minor changes of obesity prevalence in BR, the difference of BMI and skin-fold thickness between groups became statistically significant. Logistic regression analysis revealed that overweight of the mother, maternal smoking during pregnancy, bottle feeding, and low social status remained important risk factors for overweight and adiposity at 6 y of age.

CONCLUSION

A maternal BMI of > or =27, bottle-feeding, maternal smoking during pregnancy, and low social status are risk factors for overweight and adiposity at 6 y of age. Early bottle-feeding brings forward the obesity rebound, predictive of obesity in later life.