Trends and correlates of unhealthy dieting behaviours among adolescents in the United States, 1999-2013

Eating Disorder Risk Among Adolescents: The Influence of Dietary Patterns, Physical Activity, and BMI

BACKGROUND/OBJECTIVES

Eating disorders (EDs) are rising among adolescents. BMI, diet, and physical activity influence ED risk, but their interactions are complex and vary by population. Considering sociocultural changes, this study investigated the prevalence and risk factors for EDs in Romanian adolescents. We evaluated demographic factors, BMI, dietary behaviors, physical activity (PA), and previous specialist consultations using the Eating Attitudes Test-26 (EAT-26) and assessed the psychometric properties of the EAT-26 in this population.

METHODS

A cross-sectional study included 423 youths aged 13 to 20 from Cluj-Napoca. Participants completed an online survey on demographics, BMI, diet, physical activity, and previous health consultations. ED risk was assessed using the EAT-26. Confirmatory and exploratory factor analyses were conducted on the EAT-26, and binary logistic regression identified predictors of ED risk.

RESULTS

The prevalence of ED risk was 26.5%, with females having 1.61 times higher odds than males. Consulting a weight or mental health specialist increased the odds of increased ED risk (OR = 3.76). Higher BMI showed a trend in the unadjusted model (OR = 1.06). An initial CFA of the EAT-26 showed a suboptimal fit. Over 60% of the sample reported frequent consumption of ultra-processed foods.

CONCLUSIONS

Our findings highlight a significant ED risk in Romanian youth, filling a critical gap in regional public health evidence. Despite limitations due to the cross-sectional design and self-reported data, the results stress the need for measures promoting balanced diets, positive body image, and improved mental health access to reduce the growing prevalence of adolescent ED risk in Romania.

The Social, Behavioral, and Psychological Predictors of Young Women's Food Choices: A Scoping Review

Background/Objectives: Understanding influences on food habits is crucial to developing effective strategies to improve dietary quality. Past research shows that the predictors of food habits may be dependent on individuals' age and sex. Young women are a population of particular concern, as they have one of the greatest disparities between actual and recommended diet. The purpose of this review is to better understand the current body of research on factors that may influence young women's eating patterns. Methods: A systematic search on PubMed identified studies on the social, behavioral, and psychological predictors of food choices among females 13-24 years in the United States published between 2017 and 2022. Two researchers independently conducted a content analysis of the 48 final articles. The two researchers then jointly identified overarching themes in the literature, with consultation from a third researcher. Results: While social and psychological factors are frequently examined in the current literature, few studies evaluate behavioral influences on young women's eating habits. Overall, little research has been conducted on diet quality influences among young women, as <2% of articles contained findings that met the inclusion criteria. Conclusions: This analysis indicates that additional research is needed to ascertain predictors of adolescent and young adult women's food patterns and dietary choices.

Unhealthy weight control behaviors and its determinants among female adolescents in Hawassa city, Sidama region, Ethiopia, 2023: school based study

BACKGROUND

The desire to control personal weight status is ever-increasing among adolescents to achieve societal desirability for thinness across developed and developing countries. The purpose of this study was to estimate the magnitude of unhealthy weight control behaviors and determinants among female adolescents.

METHOD

School based cross sectional study was conducted among 526 randomly selected female adolescent students using self-administered questionnaire. Unhealthy weight control behaviors, Body Mass Index-for-age, perceived weight status, depression symptoms and body part satisfaction were assessed. Binary logistic regression was used to analyze data and adjusted odds ratio with 95% confidence interval was used to measure strength of association.

RESULT

The overall prevalence of unhealthy weight control behaviors among female high school adolescent is 38% (95% CI: 34.0%, 42.0%). Perceived weight status (AOR = 1.82, 95% CI = 1.16-2.84), BMI for age (AOR = 3.38; 95% CI = 1.85-6.17), level of depression; mild depression (AOR = 1.81, 95% CI = 1.18-2.77) and moderate (AOR = 2.68; 95% CI = 1.11-6.47), weight related teasing (AOR = 1.69, 95% CI = 1.11-2.57)., and use social media (AOR = 3.04; 95% CI = 1.60-5.77) were remained associated factors of UWCBs among female adolescent students.

CONCLUSION

The current study has shown that more than one in three female adolescents was engaged in UWCBs. Therefore, school-based awareness creation by establishing clubs which promote healthy lifestyle should be given due emphasis. Such intervention should consider factors like; weight perception, depressive mood, weight related teasing, and social media use.

Body Weight Perceptions Among Youth From 6 Countries and Associations With Social Media Use: Findings From the International Food Policy Study

BACKGROUND

Body dissatisfaction is associated with poor psychological and physical health, particularly among young people. However, limited data exist on body size perceptions across countries and factors associated with dissatisfaction.

OBJECTIVE

This study examined dissatisfaction prevalence and associations with sociodemographics and social media use among youth in 6 countries.

DESIGN

Repeat cross-sectional national online surveys were conducted as part of the 2019 and 2020 International Food Policy Study Youth Survey.

PARTICIPANTS

The sample included 21 277 youth aged 10 to 17 years from Australia, Canada, Chile, Mexico, the United Kingdom, and the United States. Youth were recruited to complete the online survey through parents/guardians enrolled in the Nielsen Consumer Insights Global Panel and their partners' panels.

MAIN OUTCOME MEASURES

Figural drawing scales assessed self-perceived and ideal body images, with differences between scales representing body dissatisfaction.

STATISTICAL ANALYSES PERFORMED

Multinomial logistic regression models examined differences in body dissatisfaction by country, and associations with sociodemographics and either social media screen time or platforms used, including 2-way interactions with country.

RESULTS

Overall, approximately 45% of youth reported the same perceived and ideal body sizes, whereas 35% were "larger than ideal" (from 33% in Canada and Australia to 42% in Chile) and 20% were "thinner than ideal" (from 15% in Chile to 22% in Mexico). Greater social media screen time was associated with a higher likelihood of moderate-severe dissatisfaction for being "thinner than ideal" and at least mild dissatisfaction for being "larger than ideal" (P < .003 for all contrasts), with greater dissatisfaction among users of YouTube and Snapchat than nonusers (P ≤ .005 for both contrasts). Modest differences in body dissatisfaction between countries were observed for age, ethnicity, body mass index, and weight-based teasing.

CONCLUSIONS

Body dissatisfaction is prevalent among youth across diverse countries. These findings highlight the need to promote healthy body image in youth, particularly among social media users.

Weight loss trends in Korean adolescents (2005-2021): Exploring the impact of measured and self-perceived weight status

OBJECTIVE

This study aims to assess the trends in the proportions of weight loss efforts among Korean adolescents aged 10-18 years from 2005 to 2021, examining variations based on weight status, to examine factors related to weight loss efforts by weight status, and to evaluate weight loss efforts based on the combination of measured and self-perceived weight status.

METHODS

Complex sample design analyses were conducted on a dataset comprising 10,760 adolescents, utilizing information from the Korea National Health and Nutrition Examination Survey, a nationally representative dataset. Participants were categorized into non-overweight and overweight groups using a BMI percentile threshold of 85.

RESULTS

22-29 % of non-overweight adolescents and 54-77 % of adolescents with overweight engaged in weight loss efforts. Among adolescents who attempted to lose weight from 2005 to 2017, 39.5-57.1 % tried both of diet and exercise, 22.7-47.4 % tried exercise alone, and 10.2-26.7 % tried diet alone. Female gender, older age, and higher self-perceived weight status were associated with increased odds of weight loss efforts, irrespective of actual weight status. For adolescents perceiving themselves as obese, the odds of attempting weight loss were 8.32 for non-overweight boys, 2.02 for non-overweight girls, 15.28 for overweight boys, and 5.77 for overweight girls compared to controls who were non-overweight and perceived themselves as not obese.

CONCLUSION

Weight loss efforts among Korean adolescents aged 10 to 18 remained consistent irrespective of their actual weight over 16 years. Throughout this period, adolescents who perceived themselves as obese were more likely to attempt weight loss, independent of their true weight status. Hence, subjective weight perception plays a significant role in influencing weight loss behaviors among adolescents.

Factors associated with prospective changes in weight control intentions among adolescents

INTRODUCTION

The present study examined predictors of negative changes in weight control intentions from before to during the COVID-19 pandemic among adolescents.

METHODS

Participants were Canadian secondary school students enrolled in the COMPASS study and had completed self-report surveys before (T1; 2018/2019 and/or 2019/2020 school year) and during (T2; 2020/2021 and/or 2021/2022) the COVID-19 pandemic (N = 11,869, Mage ± SD = 13.79 years old ± 1.15, 52.89% girls, 45.30% boys, 1.81% gender diverse). Demographic, interpersonal, behavioral, and psychological predictors of weight control intention change from T1 (stay the same weight, not doing anything about weight) to T2 (lose weight, gain weight) were tested using multilevel logistic regressions.

RESULTS

Over one-third (37.0%) of adolescents who reported wanting to stay the same weight at T1 changed their intention to lose or gain weight at T2, as did 28.5% of adolescents who reported not wanting to do anything about their weight at T1. Changing weight control intention from "not doing anything about weight" at T1 to weight gain/loss at T2 was associated with resistance training, emotion dysregulation, bullying, social media use, and gender. Changing weight control intention from "stay the same weight" at T1 to weight gain/loss at T2 was associated with gender, perceived financial comfort, social media use, and flourishing.

CONCLUSIONS

Results highlight the prevalence of maladaptive weight control intention changes among adolescents, and elucidate related behavioral, interpersonal, demographic, and psychological factors. Findings can inform targeted intervention and prevention strategies to disrupt maladaptive changes in weight control intentions among high-risk subgroups.

Body Mass Index Categories of Transgender and Gender Diverse Youth: Clinical Associations and Predictors

Background: Transgender/gender diverse (TGD) youth are at risk for weight-related problems. We describe factors associated with their body mass index (BMI) category. Methods: Chart review of 228 TGD patients, 12-20 years (u = 15.7, standard deviation 1.3), 72% female assigned at birth. BMI percentile was calculated using CDC growth charts. We examined bivariate relationships of 18 clinically derived factors, utilizing analysis of variance (ANOVA) for continuous variables and chi-squared/Fisher's exact test for categorical variables. Nonparametric Classification and Regression Tree (CART) analyses were used to predict BMI category. Results: Almost half (49.6%) of TGD youth presenting for their initial visit for pediatric gender-affirming care fell in the healthy weight range, 4.4% in the underweight range, 16.7% in the overweight range, and 29.4% in the obese range. Self-described weight, weight management intentions, unhealthy weight management, prescription of psychiatric medications, and medications associated with weight gain were associated with BMI category. Use of psychiatric medications (54.8%) and medications associated with weight gain (39.5%) was associated with BMI in the overweight/obese categories. Youth with obesity most often reported unhealthy weight management. In CART models, self-described weight was the strongest predictor of BMI category. Conclusion: TGD youth have high rates of underweight and overweight/obesity. Unhealthy BMI should be treated as part of gender-affirming care. Self-described body weight is associated with weight category. More than half of TGD youth were prescribed psychiatric medications; those with overweight and obesity were more likely prescribed psychiatric and medications with associated weight gain. Youth with obesity were most likely to use unhealthy weight management.

The societal costs and health impacts on obesity of BMI report cards in US schools

OBJECTIVE

This study aimed to estimate the 10-year cost-effectiveness of school-based BMI report cards, a commonly implemented program for childhood obesity prevention in the US where student BMI is reported to parents/guardians by letter with nutrition and physical activity resources, for students in grades 3 to 7.

METHODS

A microsimulation model, using data inputs from evidence reviews on health impacts and costs, estimated: how many students would be reached if the 15 states currently measuring student BMI (but not reporting to parents/guardians) implemented BMI report cards from 2023 to 2032; how many cases of childhood obesity would be prevented; expected changes in childhood obesity prevalence; and costs to society.

RESULTS

BMI report cards were projected to reach 8.3 million children with overweight or obesity (95% uncertainty interval [UI]: 7.7-8.9 million) but were not projected to prevent any cases of childhood obesity or significantly decrease childhood obesity prevalence. Ten-year costs totaled $210 million (95% UI: $30.5-$408 million) or $3.33 per child per year with overweight or obesity (95% UI: $3.11-$3.68).

CONCLUSIONS

School-based BMI report cards are not cost-effective childhood obesity interventions. Deimplementation should be considered to free up resources for implementing effective programs.

De-implementing public health policies: a qualitative study of the process of implementing and then removing body mass index (BMI) report cards in Massachusetts public schools

BACKGROUND

This study explored reasons for the adoption of a policy to distribute report cards to parents about children's weight status ("BMI report cards") in Massachusetts (MA) public schools in 2009 and the contextual factors influencing the policy removal in 2013.

METHODS

We conducted semi-structured, qualitative interviews with 15 key decision-makers and practitioners involved with implementing and de-implementing the MA BMI report card policy. We analyzed interview data using a thematic analytic approach guided by the Consolidated Framework for Implementation Research (CFIR) 2.0.

RESULTS

Primary themes were that (1) factors other than scientific evidence mattered more for policy adoption, (2) societal pressure spurred policy adoption, (3) problems with the policy design contributed to inconsistent implementation and dissatisfaction, and (4) media coverage, societal pressure, and organizational politics and pressure largely prompted de-implementation.

CONCLUSIONS

Numerous factors contributed to the de-implementation of the policy. An orderly process for the de-implementation of a policy in public health practice that manages drivers of de-implementation may not yet exist. Public health research should further focus on how to de-implement policy interventions when evidence is lacking or there is potential for harm.

Screen time, social media use, and weight-change behaviors: Results from an international sample of adolescents

This study aimed to investigate whether screen time and social media use are associated with weight-change behaviors among an international sample of adolescents. Cross-sectional data from the 2020 International Food Policy Study Youth Survey (ages 10-17; Australia, Canada, Chile, Mexico, United Kingdom, United States; N = 12,031) were analyzed. Self-reported hours of use of five forms of screen time (e.g., social media use), and total screen time per weekday were assessed. Use of six contemporary social media platforms (e.g., Facebook, Instagram) were also assessed. Weight-change behaviors included current attempts to gain weight, lose weight, stay the same weight, and not do anything to change weight, as well as dieting to lose weight in the past 12 months. Greater total screen time per weekday was associated with attempts to gain weight and lose weight, and dieting to lose weight. Specific social media platform use was associated with weight-change behaviors. For example, use of Twitter was most strongly associated with attempts to gain weight, lose weight, and dieting to lose weight. Findings underscore the international pervasiveness of screen time and social media use correlating with weight-change behaviors among adolescents. Global efforts are needed to ensure the appropriate use of screens and social media among adolescents.

Effectiveness of interventions using apps to improve physical activity, sedentary behavior and diet: An umbrella review

Technology has been recently found to be an effective tool to deliver public health interventions [1]. More specifically, the effects of interventions using apps to improve health have been targeted lately [2]. The goal of the present study was to conduct a systematic review of systematic reviews to summarize the scientific evidence. Three research questions were formulated to guide the research: RQ1. Are interventions using apps effective to improve PA? RQ2. Are interventions using apps effective to improve sedentary behavior? RQ3. Are interventions using apps effective to improve diet? This review of reviews was registered with PROSPERO (CRD42022345909). Systematic reviews were included following the PICOTS framework (population, intervention, comparator, outcomes, time and setting). In addition, reviews with several research objectives were included only when they comprised more than two-thirds of the studies analyzing one or more of the objectives of this review. As a result, 12 systematic reviews were selected for data extraction. Findings uncovered that apps could be effective to improve individuals' PA, sedentary behavior and diet. However, elements like the intervention components, the context/environment/setting, the length of the intervention or the population targeted should be carefully considered in future studies.

Racial and Ethnic Disparities in Weight Loss Behaviors Among US College Students

Purpose

Weight loss behaviors are prevalent among college students and are associated with adverse physical and psychological outcomes, such as an elevated risk of developing an eating disorder. While cross-ethnic differences have been reported, no consistent pattern has emerged. The purpose of this study was to examine racial and ethnic differences in weight loss behaviors among female and male college students.

Patients and Methods

The American College Health Association-National College Health Assessment (ACHA-NCHA) II-C survey data from the collection periods from 2015 to 2019 was used. A total of 426,425 students participated in the survey. Most participants were White (60%) and female (68.5%). Information on students' age, body mass index (BMI), and self-rated health was also collected. Logistic regression analyses were performed to determine cross-ethnic differences in weight loss methods among female and male students.

Results

Students' weight loss behaviors were assessed and included dieting, exercising, vomiting or taking laxatives, and the use of diet pills in the past 30 days. More than half of the participants attempted to lose weight through exercise (53.5%), and 40.3% of students dieted to lose weight in the past month. Purging and the use of diet pills were endorsed by 2.9% and 2.8% of the participants, respectively. With few exceptions, male students from racial and ethnic minority backgrounds were more likely to engage in extreme weight control practices (ie, vomiting or taking laxatives, taking diet pills) than White male students, while female students from racial and ethnic minority backgrounds were less likely to use diet and exercise as weight loss methods than White female students. For all outcomes, Biracial/Multiracial and Hispanic/Latino male students were more likely to attempt weight loss than White male students. Biracial/Multiracial female students more frequently endorsed extreme weight control behaviors than White female students.

Conclusion

The results of the present study add to the growing body of literature on the relationship between race and ethnicity and weight loss behaviors. The findings indicate the need for tailored educational and intervention programs on college campuses.

Eating disorder risks and awareness among female elite cyclists: an anonymous survey

Background

Eating disorders (EDs) are an increasingly recognized concern in professional sports. Previous studies suggests that both female gender and endurance sports put athletes at risk. Female elite cyclists are hence of specific interest. The present study aimed at evaluating the distribution of the individual risk of ED in this group. Further the association between individual risk and both the awareness for the topic ED and the deviation from “normal” weight was depicted.

Methods

Female cyclists registered with the Union Cycliste Internationale were contacted via email or facebook and asked to complete a survey comprising age, weight, the Eating-Attitude-Test (EAT-26), and questions regarding ED awareness. The observed distribution of the EAT-26 score was compared to results from previous studies in normal subjects and athletes. The distribution of the ED awareness was described and ED awareness was correlated with the EAT-26 score. Both the deviation from ideal weight and the body mass index (BMI) were correlated with the EAT-26 score.

Results

Of the 409 registered athletes 386 could be contacted, 122 completed the questionnaire. Age ranged from 20-44yrs, BMI from 17.0 to 24.6 kg/m². In the EAT-26, 39 cyclists (32.0%) scored above 20 points indicating a potential benefit from clinical evaluation, 34 cyclists (27.9%) scored 10–19 points suggesting disordered eating. Sixteen athletes (13.2%) had been treated for an ED. About 70% of athletes had been pressured to lose weight. The mean EAT-26 score was above the average observed in normal female populations. It was also above the average observed in many female athlete populations, but lower than in other leanness focussed sports. More than 80%of athletes perceived elite cyclists at risk for developing ED. Increased ED awareness and deviation from the ideal weight were associated with higher EAT-26 scores, but not the body mass index.

Conclusion

Female cyclists are at risk of developing ED and they are aware of this risk. To improve their health and well-being, increased efforts to support elite cyclists and their teams in preventive activities and early detection are crucial.

Supplementary Information

The online version contains supplementary material available at 10.1186/s13102-022-00563-6.

Desire to lose weight was associated with the adoption of weight control strategies but not healthier lifestyle behaviours among post-bariatric surgery patients: NHANES 2013-2018

The desire to lose weight is presumably high among patients with severe obesity who have undergone bariatric surgery. The purpose of this study is to examine the associations of desire to lose weight with weight control strategies, depressive symptoms and lifestyle behaviours among post-bariatric surgery patients. Participants were adults who participated in the National Health and Nutrition Examination Survey (2013-2018) and self-identified a history of bariatric surgery. The desire to lose weight, weight control strategies, depressive symptoms, physical activity and sitting time were measured by self-report questionnaires. Dietary information was derived from 24-h dietary recalls. The correlates of the desire to lose weight were examined by logistic or linear regressions with appropriate weighting and variance estimation techniques, adjusting for covariates such as length of time post-surgery. Results showed that at a mean of 7.8 (standard deviation [SD] = 0.5) years post-surgery (N = 142), 88.6% of participants wanted to weigh less. The average total energy intake was 1747 (SD = 72) kcal/day with 36.2% (SD = 0.7%) of the energy from total fat; the median total moderate-intensity physical activity was 88.5 min/week; and the mean sitting time was 796.0 (SD = 47.0) min/day. The desire to lose weight was positively associated with the adoption of healthy weight control strategies (odds ratio 17.4, 95% confidence interval 3.5-87.0, p < .01). No other significant associations were observed. Findings highlight the need for studies to improve patients' lifestyle behaviours post-surgery (e.g., reduce fat intake, increase physical activity) and examine the correlates of desire to lose weight in larger samples.

Weight Status, Medication Use, and Recreational Activities of Treatment-Naïve Transgender Youth

Background: Studies of transgender/gender diverse (TGD) youth indicate a high prevalence of overweight/obesity and concern for unhealthy weight management behavior. This study describes the association of weight status with medication use and recreational activities among treatment-naïve, pediatric TGD patients. Methods: This study is a chart review of 277 patients [aged 9-18 years, 79.1% female sex assigned at birth (SAB), and 86.3% white] seen at a medical center from 2017 to 2020. BMI was calculated by age and SAB using CDC growth charts. BMI percentile (BMI%) and BMI z-score (BMIz) were used to define weight status. Results: By BMI% category, 3.6% patients were in the underweight range (BMI <5%); 50.5% had BMI >85%; and 30.3% had BMI >95%. Overweight and obesity rates were higher than national norms (χ2 = 15.152, p < 0.01). Female SAB participants had higher BMIz values than male SAB participants. Youth who reported watching/listening to media (t = 3.50, p < 0.01) and parent-reported creative arts involvement (t = 1.97, p = 0.05) were associated with higher BMIz values. Conversely, spending time with friends and family was associated with a lower BMIz. Over half of the patients were prescribed medications, and those patients taking medications had higher BMIz values than those not taking medications (t = -1.96, p < 0.05). Female SAB, involvement in sedentary recreational activities, and taking medications to treat gastrointestinal conditions were associated with elevated BMIz. Conclusions: Overweight/obesity is a common problem among TGD youth. TGD youth should be considered a high-risk group and targeted in obesity prevention and treatment efforts. Interventions to decrease sedentary activities and improve connections with friends and family are promising strategies to address overweight and obesity among TGD youth.

Healthy Eating and Diets: Fad or Rad?

One of the top chronic diseases in the United States is pediatric obesity. As such, many pediatricians will have conversations with patients and families regarding the health effects of this disease process. This article will provide a broad overview of many of the popular diets as well as evidence for their effectiveness. Lastly, recommendations for healthy eating and nutritional counseling with patients and families will be discussed. [Pediatr Ann. 2022;51(3):e88-e92.].

Parental practices, body dissatisfaction and weight control practices in female adolescents from public schools in southern Brazil

The objective was to verify the association between body dissatisfaction (BD) - constituted by the desire to lose weight - with family and personal aspects related to the shape of the body and weight control practices in female adolescents. A cross-sectional, observational epidemiological study with adolescents aged 12-19 years, enrolled in classes of the 8th and 9th years of public schools belonging to the urban area of the city of Caxias do Sul/Rio Grande do Sul, Brazil, was conducted. A self-applicable questionnaire was used. BD was assessed using a silhouette scale. Multivariate regression was performed using Poisson regression with robust variation, hierarchically using a pre-established conceptual model, using the prevalence ratio (PR) adjusted with 95 % CI as a measure of effect. A significance level of 5 % (P ≤ 0·05) was considered. Among the 685 female students, 77·2 % had BD. The father's incentive to diet sometimes (PR 1·19; 95 % CI 1·07, 1·32; P ≤ 0·001) and always (PR 1·15; 95 % CI 1·03, 1·28; P ≤ 0·001), trying to lose weight (PR 1·63; 95 % CI 1·33, 1·99; P ≤ 0·001), dieting five times or more (PR 1·22; 95 % CI 1·09, 1·36; P ≤ 0·001) and skipping meals less than once a week (PR 1·16; 95 % CI 1·04, 1·29; P = 0·026) increased the chances of having BD. In conclusion, among the investigated parents' behaviours, only the father's incentive to go on a diet was associated with BD. Adolescent weight control practices increased the chances of having BD. Thus, it facilitates the identification of this condition at an early stage, enabling adequate treatment and prevention of health complications.

Body dissatisfaction and disordered eating are prevalent problems among U.S. young people from diverse socioeconomic backgrounds: Findings from the EAT 2010-2018 study

PURPOSE

Body dissatisfaction and disordered eating are linked to adverse health consequences. Research describing socioeconomic patterns in the prevalence of these problems is important for informing the design of health services and efforts to improve health equity.

METHODS

Population-based cohort study (EAT 2010-2018: Eating and Activity over Time) of socioeconomically and ethnically/racially diverse U.S. young people who completed surveys as adolescents in 2009-2010 (mean age = 14.5 years) and as emerging adults in 2018 (mean age = 22.0 years). Participants were recruited from 20 schools in Minneapolis-St. Paul, Minnesota. Household socioeconomic status was determined using adolescent report of parental education, employment, and public assistance benefits. Analyses were conducted using data from 1531 participants and regression models that accounted for repeated measures within individuals.

RESULTS

Among females, high body dissatisfaction and unhealthy weight control behaviors (e.g., skipping meals) were more prevalent and regular use of lifestyle weight management behaviors (e.g., exercise) was less prevalent in the low SES group as compared to the middle and/or upper SES groups (p ≤ .010). Among males, thinness-oriented dieting, unhealthy weight control behaviors, and extreme weight control behaviors (e.g., taking diet pills) were all more prevalent in the low SES group as compared to the middle and/or upper SES groups (p ≤ .010). Few differences were observed across SES groups in models that adjusted for ethnic/racial identity and body mass index.

CONCLUSIONS

There is a need for greater attention to the reach and relevance of efforts to prevent disordered eating and improve body satisfaction to ensure efforts benefit young people across SES groups.

What Role Does Body Image in Relationship between Level of Health Literacy and Symptoms of Eating Disorders in Adolescents?

(1) Background: The aim of this study was to explore the associations between health literacy and symptoms for eating disorders among adolescents, taking into consideration age and gender and whether this association is mediated by body image. (2) Methods: We used data on 5054 adolescents (mean age = 13.9, 51.7% boys) from the Health Behaviour in School-Aged Children study conducted in 2018 in Slovakia. We used logistic regression models to examine associations between level of health literacy and symptoms for eating disorders mediated by body image. (3) Results: Adolescents with low and medium levels of health literacy had a higher occurrence of reporting two or more symptoms of eating disorders (odds ratio (OR)/95% CI: 2.25/1.78-2.84 and 1.37/1.15-1.65). Adjustment for body image reduced the significance of association between low level of health literacy and symptoms for eating disorders by 26.4%, and association between medium level of health literacy and symptoms for eating disorders by 29.7%. (4) Conclusions: Adolescents who have a low health literacy level were found to have a higher probability of having symptoms for eating disorders, especially when they perceive themselves as fat. The study refers to potential theoretical frameworks for health literacy intervention that may provide guidelines for the intervention design and materials.

Yoga practice among ethnically/racially diverse emerging adults: Associations with body image, mindful and disordered eating, and muscle-enhancing behaviors

BACKGROUND

This study explores cross-sectional associations between yoga and body image, mindful eating, disordered eating, and muscle-enhancing behaviors among a population-based sample of ethnically/racially diverse emerging adults.

METHOD

An ethnically/racially diverse population-based sample of 1,568 emerging adults (18-26 years) completed surveys as part of EAT 2010-2018 (Eating and Activity over Time). Models were adjusted for sociodemographic characteristics and body mass index (BMI).

RESULTS

Practicing yoga at least 30 min/week was reported by 12.7% (n = 210) of the sample. Yoga practitioners had higher levels of mindful eating than those not practicing yoga. Although effect sizes were small, yoga practitioners were more likely than non-yoga practitioners to use steroids (3.8 vs. 0.7%, p < .001, h = 0.22) or protein powder/shakes (35.1 vs. 25.3%, p < .010, h = 0.21) to increase their muscle size/tone. Body satisfaction, unhealthy weight control behaviors, and binge eating tended to be similar among yoga practitioners and non-yoga practitioners. There was a significant interaction between BMI and yoga in predicting body satisfaction with a trend toward a positive impact among yoga practitioners at higher BMI values. Interactions between yoga practice and all body image attitudes and behaviors across gender and ethnicity/race were not statistically significant.

DISCUSSION

Young people from diverse ethnic/racial backgrounds who practice yoga are more likely to engage in mindful eating but have equal or elevated levels of unhealthy body image attitudes and behaviors as compared to non-yoga practitioners. Further research should explore how yoga is best taught and practiced to ensure that it is beneficial for body image and related behaviors.

Longitudinal associations between circulating interleukin-6 and C-reactive protein in childhood, and eating disorders and disordered eating in adolescence

OBJECTIVE

Few studies have explored the association between inflammation and eating disorders and none used a longitudinal design. We investigated the association between serum-levels of interleukin 6 (IL-6) and C-reactive protein (CRP) measured in childhood and eating disorders and related behaviours and cognitions in adolescence in a large general population sample.

METHODS

We used data from the Avon Longitudinal Study of Parents and Children (ALSPAC). Our exposures were thirds of IL6 and CRP derived from serum measurements taken at age nine years, and outcomes were eating disorder diagnoses and self-reported disordered eating behaviours at ages 14, 16, and 18 years. We used univariable and multivariable multilevel logistic regression models adjusting for a number of potential confounders, including sex, fat mass, and pre-existing mental health difficulties.

RESULTS

Our sample included 3480 children. Those in the top third of CRP had lower odds of binge eating (odds ratio(OR):0.62, 95% confidence interval (CI):0.39,1.00,p "equals" 0.05) and fasting (OR:0.63, 95% CI:0.38,1.07,p "equals" 0.09) after adjustment for confounders. We also observed weak associations of comparable magnitude for purging, anorexia nervosa, and bulimia nervosa. We did not find any associations between levels of IL6 and any of the outcomes under study.

CONCLUSIONS

There was little evidence of an association between CRP and IL-6 and adolescent eating disorder outcomes. The inverse association observed between CRP and binge eating was unexpected, so caution is needed when interpreting it. One possible explanation is that higher CRP levels could have a protective role for disordered eating by affecting appetitive traits.

Weight Reduction Behaviors Among European Adolescents-Changes From 2001/2002 to 2017/2018

PURPOSE

The purpose of this study was to analyze changes in the prevalence of weight reduction behaviors (WRBs) among European adolescents from 26 countries between 2001/2002 and 2017/2018. The impact of the perception of body weight on WLB was also analyzed, with particular attention being paid to overestimation.

METHODS

The data of 639,194 European adolescents aged 11, 13, and 15 years who participated in the Health Behaviour in School-aged Children survey were analyzed. Age-standardized prevalence rates of WRB were estimated separately by survey round and gender for each country, using the overall 2017/2018 Health Behaviour in School-aged Children study population as the standard. Multivariate logistic regression analyses were used to assess WRB trends over time, adjusted for survey year, body mass index, body weight misperception, and family affluence and stratified by gender and age.

RESULTS

In the 26 countries examined, the overall age-adjusted prevalence rates of WRB were 10.2% among boys and 18.0% among girls. The prevalence of WRB was higher for girls, but in the more recent surveys, gender differences in WRB decreased. There was a significant increase in the percentage of WRB among boys in most countries. Among girls, most countries did not experience significant changes. Increases in body mass index and overestimation of body weight were significant factors increasing the risk of WRB in both genders.

CONCLUSIONS

The change in the prevalence of WRB by gender warrants greater attention from researchers and practitioners alike.

Gender Norms and Weight Control Behaviors in U.S. Adolescents: A Prospective Cohort Study (1994-2002)

PURPOSE

The aim of this article was to determine the relationship between gender norms and weight control behaviors in U.S. adolescents.

METHODS

We analyzed prospective cohort data from the National Longitudinal Study of Adolescent to Adult Health (N = 9,861), at baseline in 1994-1995 (ages 11-18 years, Wave I), 1-year follow-up (ages 12-19 years, Wave II), and 7-year follow-up (ages 18-26 years, Wave III). The primary exposure variable was a measure of one's gender normativity based on the degree to which males and females behave in ways that are similar to the behaviors of their same-gender peers. The outcome variable was an individual's weight control attempts (trying to lose or gain weight) and behaviors (dieting, fasting/skipping meals, vomiting, or weight-loss pills/laxatives/diuretics to lose weight or ate different/more foods than usual or taking supplements to gain weight).

RESULTS

In logistic regression analyses controlling for potential confounders, a higher baseline individual gender normativity score (higher femininity in females and higher masculinity in males) was associated with weight loss attempts (β = .10; p = .01) and weight loss behaviors (β = .18; p < .001) in girls but was associated with weight gain attempts (β = .18; p < .001) and behaviors (β = .16; p < .001) in boys at 1-year follow-up. Higher individual gender normativity score was protective of weight loss attempts (β = -.15; p < .001) and weight loss behaviors (β = -.17; p < .001) in males but not females at 7-year follow-up. Loess plots provided visualizations of significant relationships.

CONCLUSIONS

Gender norms may reinforce a thinner body ideal for girls but a larger ideal for boys.

Frequency of Trying to Lose Weight and Its Association with Children's Weight Perception and Dietary Intake (NHANES 2011-2012)

Weight loss practices and frequency among children and adolescents can impact overall diet quality. We used cross-sectional U.S. National Health and Nutrition Examination Survey data (NHANES) 2011-2012 from 1303 children and adolescents (8-15 years) to examine associations between frequency of trying to lose weight (never vs. sometimes/a lot) and sociodemographic characteristics, self-perception of weight, and dietary intake. A greater frequency of trying to lose weight was reported by participants with overweight/obesity, those from households with lower annual income and those who perceived they were overweight or obese compared to their counterparts. A high proportion of participants with overweight and obesity considered themselves to be "about the right weight" (76.7 and 42.8%, respectively). Intake data based on one 24-h dietary recall were examined using multivariable regression models adjusted for child and parent/family characteristics. In adjusted analyses, energy and total fat intakes were lower among those trying to lose weight compared to those never trying to lose weight. Intakes of cholesterol, sodium, and refined grains were not different by frequency of trying to lose weight (all p = 0.059-0.074). Weight loss efforts may be related to better nutritional profiles for some children and adolescents.

Weight status perception and weight loss intention among urban youth

AIM

We explored associations of weight perception with measured weight status and weight loss intention among urban youth.

METHODS

This community surveillance project included 317 youth (10-19 years, 64% black) who answered YRBSS questions and underwent measurements of height and weight.

RESULTS

Weight misperception was observed among 47% of participants; 41% underestimated and 6% overestimated their weight status. Among youth with overweight and obesity, however, 72% misperceived their weight status; those with accurate perception were more likely to report trying to lose weight.

CONCLUSION

Addressing weight status misperceptions may be essential when advocating lifestyle behavior change to promote healthful body weight among youth.