Evidence-based behavioral treatment of obesity in children and adolescents

Perception of Overall Health, Weight Status, and Gaining Weight in Relationship With Self-Reported BMI Among High School Students

BACKGROUND

Correct perception of weight status and gaining weight are important motivational factors for physical activity among overweight and obese children. However, misperception is common.

OBJECTIVE

The objective of this study is to assess perceptions of overall health, weight status, and weight gain in relation to BMI among high school students.

METHODS

A face-to-face validated survey-based study was conducted among high school students. BMI was calculated based on the self-reported height and weight to compare with perceived weight status based on a question: "Do you consider yourself to be underweight, overweight, about right, or obese?" Participants were asked to rate their health and how much they worry about gaining weight. Descriptive and chi-square tests were used for analysis. The level of significance was 0.05.

RESULTS

The results of this study show female students are more likely to perceive themselves as overweight and worried about gaining weight compared to their male peers. The results also show that a low percentage of male and female students rate their overall health as poor with an overweight BMI.

CONCLUSION

The results of this study provide the framework for understanding the differences in how male and female high school students perceive their health, weight status, and weight gain in relation to BMI. Inaccurate perception of one's weight status increases the risk of being overweight/obese and decreases the likelihood that students will engage in healthy lifestyle behaviors.

A Snapshot of Community Engagement in Research in the Context of an Evolving Public Health Paradigm: Review

BACKGROUND

Community engagement is a work in process. Researchers continue to refine the process of collaboration and look to best practice and lessons learned for guidance in this relatively new model.

OBJECTIVE

The aim of this study was to provide a snapshot of whether community engagement has been included in the design and implementation of research initiatives in Australia, Canada and the United Kingdom. The secondary aim is to identify the underlying themes present, to identify theories and tools that drive research.

METHODS

A literature search was performed to identify studies that have been conducted to reduce the weight of the general population.

RESULTS

The results of the study, which focused on the field of weight loss, indicate that scientific and technological advancements are the primary drivers of research. However, these new research initiatives have largely been undertaken in the absence of community engagement.

CONCLUSIONS

The study concludes that initiatives need to adapt to a wider range of stakeholders, develop equitable community engagement platforms and take into consideration.

Diet, physical activity and behavioural interventions for the treatment of overweight or obese children from the age of 6 to 11 years

BACKGROUND

Child and adolescent overweight and obesity has increased globally, and can be associated with significant short- and long-term health consequences. This is an update of a Cochrane review published first in 2003, and updated previously in 2009. However, the update has now been split into six reviews addressing different childhood obesity treatments at different ages.

OBJECTIVES

To assess the effects of diet, physical activity and behavioural interventions (behaviour-changing interventions) for the treatment of overweight or obese children aged 6 to 11 years.

SEARCH METHODS

We searched CENTRAL, MEDLINE, Embase, PsycINFO, CINAHL, LILACS as well as trial registers ClinicalTrials.gov and ICTRP Search Portal. We checked references of studies and systematic reviews. We did not apply any language restrictions. The date of the last search was July 2016 for all databases.

SELECTION CRITERIA

We selected randomised controlled trials (RCTs) of diet, physical activity, and behavioural interventions (behaviour-changing interventions) for treating overweight or obese children aged 6 to 11 years, with a minimum of six months' follow-up. We excluded interventions that specifically dealt with the treatment of eating disorders or type 2 diabetes, or included participants with a secondary or syndromic cause of obesity.

DATA COLLECTION AND ANALYSIS

Two review authors independently screened references, extracted data, assessed risk of bias, and evaluated the quality of the evidence using the GRADE instrument. We contacted study authors for additional information. We carried out meta-analyses according to the statistical guidelines in the Cochrane Handbook for Systematic Reviews of Interventions.

MAIN RESULTS

We included 70 RCTs with a total of 8461 participants randomised to either the intervention or control groups. The number of participants per trial ranged from 16 to 686. Fifty-five trials compared a behaviour-changing intervention with no treatment/usual care control and 15 evaluated the effectiveness of adding an additional component to a behaviour-changing intervention. Sixty-four trials were parallel RCTs, and four were cluster RCTs. Sixty-four trials were multicomponent, two were diet only and four were physical activity only interventions. Ten trials had more than two arms. The overall quality of the evidence was low or very low and 62 trials had a high risk of bias for at least one criterion. Total duration of trials ranged from six months to three years. The median age of participants was 10 years old and the median BMI z score was 2.2.Primary analyses demonstrated that behaviour-changing interventions compared to no treatment/usual care control at longest follow-up reduced BMI, BMI z score and weight. Mean difference (MD) in BMI was -0.53 kg/m2 (95% confidence interval (CI) -0.82 to -0.24); P < 0.00001; 24 trials; 2785 participants; low-quality evidence. MD in BMI z score was -0.06 units (95% CI -0.10 to -0.02); P = 0.001; 37 trials; 4019 participants; low-quality evidence and MD in weight was -1.45 kg (95% CI -1.88 to -1.02); P < 0.00001; 17 trials; 1774 participants; low-quality evidence.Thirty-one trials reported on serious adverse events, with 29 trials reporting zero occurrences RR 0.57 (95% CI 0.17 to 1.93); P = 0.37; 4/2105 participants in the behaviour-changing intervention groups compared with 7/1991 participants in the comparator groups). Few trials reported health-related quality of life or behaviour change outcomes, and none of the analyses demonstrated a substantial difference in these outcomes between intervention and control. In two trials reporting on minutes per day of TV viewing, a small reduction of 6.6 minutes per day (95% CI -12.88 to -0.31), P = 0.04; 2 trials; 55 participants) was found in favour of the intervention. No trials reported on all-cause mortality, morbidity or socioeconomic effects, and few trials reported on participant views; none of which could be meta-analysed.As the meta-analyses revealed substantial heterogeneity, we conducted subgroup analyses to examine the impact of type of comparator, type of intervention, risk of attrition bias, setting, duration of post-intervention follow-up period, parental involvement and baseline BMI z score. No subgroup effects were shown for any of the subgroups on any of the outcomes. Some data indicated that a reduction in BMI immediately post-intervention was no longer evident at follow-up at less than six months, which has to be investigated in further trials.

AUTHORS' CONCLUSIONS

Multi-component behaviour-changing interventions that incorporate diet, physical activity and behaviour change may be beneficial in achieving small, short-term reductions in BMI, BMI z score and weight in children aged 6 to 11 years. The evidence suggests a very low occurrence of adverse events. The quality of the evidence was low or very low. The heterogeneity observed across all outcomes was not explained by subgrouping. Further research is required of behaviour-changing interventions in lower income countries and in children from different ethnic groups; also on the impact of behaviour-changing interventions on health-related quality of life and comorbidities. The sustainability of reduction in BMI/BMI z score and weight is a key consideration and there is a need for longer-term follow-up and further research on the most appropriate forms of post-intervention maintenance in order to ensure intervention benefits are sustained over the longer term.

GPs, families and children's perceptions of childhood obesity

BACKGROUND

Childhood obesity has a high risk of becoming a chronic disease requiring life-long weight management. Evidence based guidelines were developed and distributed to GPs throughout Australia by the NHMRC, but current application falls short. Measuring height and weight, and calculating BMI for children appears to be rare. Some general practitioners (GPs) perceive significant barriers to managing this patient cohort, and patients report not having confidence in their GPs.

AIM

To explore perceptions and experiences of treating childhood obesity of (i) GPs, (ii) families involved in a childhood obesity study in general practiceâ?? and (iii) families not involved in the project, but who had concerns about childhood obesity.

METHODOLOGY

Supported by the literature, a semi-structured schedule was developed to address the aims. Ten GPs and eight families involved, and four families previously not involved in the project participated in interviews in 2009. All family interviews were audio-taped and transcribed verbatim. Data were thematically analyzed.

FINDINGS

Five themes emerged: (1) raising the topic, (2) frustrations experienced by GPs and families, (3) support available for GPs to provide to families and/or anticipated by families, (4) successes from involvement in the project and (5) sustaining improvements â?? the GPsâ?? and family's perspectives.

DISCUSSION AND CONCLUSION

All acknowledged that childhood obesity is a sensitive issue with both GPs and parents preferring the other to raise the topic. GPs reported successes in practice and patient management such as improved patient records. For families, the GPs dedication and support were major factors sought.

Rationale, design and methods for a staggered-entry, waitlist controlled clinical trial of the impact of a community-based, family-centred, multidisciplinary program focussed on activity, food and attitude habits (Curtin University's Activity, Food and Attitudes Program--CAFAP) among overweight adolescents

Background

Current estimates place just under one quarter of adolescents in Australia as overweight or obese. Adolescence has been identified as a critical period for the development of obesity, yet despite this recognition, there is limited systematic research into or evaluation of interventions for overweight adolescents. Reviews have concluded that there is a substantive evidence gap for effective intervention, but physical activity, lifestyle change and family involvement have been identified as promising foci for treatment.

Methods

This paper reports on the development of a staggered-entry, waitlist controlled clinical trial to assess the impact of a multidisciplinary intervention aiming to change the poor health trajectory of overweight adolescents and help them avoid morbid obesity in adulthood—Curtin University’s Activity, Food and Attitudes Program (CAFAP). 96 adolescents, aged 11–16 years, and parents, will attend twice weekly during an 8 week intensive multidisciplinary program with maintenance follow-up focussed on improving activity, food and attitude habits. Follow-up assessments will be conducted immediately after completing the intensive program, and at 3, 6 and 12 months post intensive program. Main outcomes will be objectively-measured physical activity, sedentary behaviour and activity behaviours; food intake (measured by 3 day diary) and food behaviours; body composition, fitness and physical function; mental and social well-being (quality of life, mood and attitudes), and family functioning.

Discussion

This trial will provide important information to understand whether a community based multidisciplinary intervention can have short and medium term effects on activity and food habits, attitudes, and physical and mental health status of overweight adolescents.

Trial registration

Australian New Zealand Clinical Trials Registry ACTRN12611001187932.

Behavioral therapy for management of obesity

Obesity is a major public health problem and is implicated in the rising prevalence of cardiac disease and type 2 diabetes mellitus in India. Management of an obese patient includes therapeutic lifestyle changes of increasing physical activity and reducing calorie intake. This combination can result in about a 10% loss of initial body weight. To reinforce this intervention, behavioral therapy needs to be incorporated into the overall intervention under the belief that obesity is a result of maladaptive eating behaviors and exercise patterns. This review explains the principles of behavioral therapy, including the underlying assumptions and characteristics. The common components of behavioral therapy for obesity are explained. The different settings where behavioral therapy can be administered are mentioned. The review focuses on how behavioral therapy can be incorporated in the routine clinical management of obesity by primary and secondary care physicians who encounter obese patients.

Self-weighing among adolescents: associations with body mass index, body satisfaction, weight control behaviors, and binge eating

Among adolescent girls, the health effects of frequent self-weighing are unclear. This study examines cross-sectional and longitudinal associations between frequency of self-weighing and body mass index (BMI), body satisfaction, weight control behaviors, and binge eating among a diverse population of adolescent girls. The study was conducted in the Minneapolis/St Paul, MN, metropolitan area between 2007 and 2009. The study population included 356 adolescent girls (mean age 15.7 years); 46.2% of the girls were overweight or obese and >75% were from a racial/ethnic minority group. Anthropometric and survey data were collected at baseline and at follow-up 9 months later. Hierarchical linear regression models were developed to test associations. Cross-sectionally, frequent self-weighing was associated with lower body satisfaction (P=0.034) and higher rates of healthy (P=0.002), unhealthy (P=0.016), and extreme (P=0.038) weight control behaviors. A quadratic association was found between frequency of self-weighing and binge eating, with girls who weighed themselves least and most frequently reporting the highest prevalences of binge eating (P=0.014). No association was observed between frequency of self-weighing and girls' BMI (P=0.111). Short-term longitudinal associations between baseline frequency of self-weighing and changes in body satisfaction, weight control behaviors, binge eating, or BMI were not observed. Findings suggest that among adolescent girls, frequent self-weighing is cross-sectionally associated with both healthy and potentially harmful unhealthy weight control behaviors, and does not contribute to weight loss over time. Adolescents should not be encouraged to engage in frequent self-weighing.

A Preliminary Investigation of Stimulus Control, Self-Monitoring, and Reinforcement in Lifestyle Interventions for Pediatric Overweight

Objective. The current study examined the use of stimulus control, self-monitoring, and reinforcement by youth, parents, and interventionists as related to weight management in lifestyle intervention programs. Design. Secondary analysis of an existing data set was used to integrate the results of 14 published, randomized treatment–control intervention trials for overweight youth aged 2 to 18 years. Main outcome measure. Between-group differences in weight-related outcomes, including weight, body mass index (BMI), and percentage overweight, measured at the end of treatment, were used to calculate effect sizes for each treatment–control comparison. Additionally, average effect sizes were calculated among sets of comparisons sharing similar approaches to implementing behavioral techniques. Results. Treatment programs that taught youth to use stimulus control, taught youth to self-monitor, and taught parents to use reinforcement, produced significantly larger effect sizes than programs that did not include these components. The beneficial effects of these specific behavioral techniques appeared to be amplified when used with multiple key individuals. Conclusion. This initial study quantitatively demonstrated significant benefits associated with teaching youth stimulus control and self-monitoring, and teaching parents reinforcement to shape health behaviors in lifestyle interventions for pediatric overweight. Furthermore, teaching youth and parents the same techniques may contribute to better weight-related outcomes. These findings and descriptive information on how techniques were described, taught, and delivered may guide future research efforts aimed at identifying and examining the most effective behavioral components to include in brief interventions.

Diet, exercise, behavior: the promise and limits of lifestyle change

The prevalent surge in childhood and adolescent obesity within the past 3 decades poses a significant challenge for many pediatric clinicians who are charged with treating this condition. Comprehensive, research-based pediatric obesity treatment programs are essential to addressing this problem and preventing the transition of obesity and its many comorbidities into adulthood. This paper will identify dietary, physical activity, and behavioral approaches to lifestyle change and describe how they are incorporated as part of multidisciplinary treatment interventions in youth. Specific tailoring of treatment programs to address age and varying degrees of overweight and obesity will also be presented along with recommendations for future research.