Exploring muscularity concerns and behaviours among boys and men with probable eating disorders.

The muscular body ideal and muscularity concerns and behaviors have been posited to be major drivers of eating disorder psychopathology among boys and men. However, there is limited evidence of this, particularly among large, international samples. This study aimed to compare muscularity concerns and behaviors across probable eating disorder diagnoses among a non-clinical sample of boys and men from Canada and the United States.

Prior incarceration and food insecurity trajectories through older adulthood: findings from the Health and Retirement Study.

Introduction: Prior cross-sectional research has identified incarceration as a risk factor for food insecurity across the life course. However, there is a lack of longitudinal studies on the relationship between prior incarceration and food insecurity over time.

Methods: This study uses biennial data across 10 time points from the Health and Retirement Study (years 2012-2022) to examine the association between prior incarceration and longitudinal trajectories of food insecurity among adults aged 55 and older in the USA (N=8229).

Prescription weight loss medication use and eating disorder psychopathology among adolescent boys and young men from Canada and the United States.

This study aimed to identify the prevalence of prescription weight loss medication use among boys and men, describe the sociodemographic differences between those who did and did not report use, and explore differences in eating disorder attitudes and behaviors between those who did and did not report use. Data from 1543 boys and men from Canada and the United States aged 15 to 35 were analyzed. The prevalence of prescription weight loss medication use in the past 12 months was estimated.

Cyberbullying, mental health, and substance use experimentation among early adolescents: a prospective cohort study.

Background: Although cyberbullying has been linked with adverse health outcomes, most prior studies have been cross-sectional, and there are limited large-scale, prospective analyses examining cyberbullying and mental health and substance use outcomes in early adolescents. Therefore, the aim of this study was to determine prospective associations between cyberbullying, mental health, and substance use experimentation one year later in a US national cohort of early adolescents (11-12 years old).

Methods: We analyzed prospective cohort data from the Adolescent Brain Cognitive Development (ABCD) Study (Year 2, N = 9799).

Social epidemiology of bedtime screen use behaviors and sleep outcomes in early adolescence.

Objectives: The current study aimed to determine sociodemographic associations of bedtime screen use behaviors and the sociodemographic differences in the associations between bedtime screen use and sleep outcomes in a national (US) study of early adolescents.

Methods: We analyzed cross-sectional data from 10,305 early adolescents (12-13years, 48.4% female) in the Adolescent Brain Cognitive Development (ABCD) Study (Year 3, 2019-2021).

Social Media Use and Depressive Symptoms During Early Adolescence.

Importance: In 2023, the US Surgeon General issued the Advisory on Social Media and Youth Mental Health, identifying critical research gaps that preclude evidence-based guidance given that most studies of social media and mental health have been cross-sectional rather than longitudinal and have focused on young adults or older adolescents rather than on younger adolescents.

Objective: To evaluate longitudinal associations between social media use (time spent on social media) and depressive symptoms across 4 annual waves spanning a 3-year follow-up period from late childhood to early adolescence.

Design, Setting, And Participants: In this prospective cohort study using data from the Adolescent Brain Cognitive Development Study across 21 study sites from October 2016 to October 2018, children aged 9 to 10 years at baseline were assessed across 4 waves (baseline, year 1, year 2, and year 3), with year-3 follow-up through 2022.

Associations between muscularity-oriented social media content and muscle dysmorphia among boys and men.

This study aimed to determine whether viewing muscularity-oriented social media content was associated with muscle dysmorphia among a sample of boys and men from Canada and the United States. Data from the Study of Boys and Men (2024; N = 1553) were analyzed. Multiple linear regression analyses were conducted to determine the associations between viewing content with 1) muscular bodies, 2) muscle-building dietary supplements (e.

Social epidemiology of sports and extracurricular activities in early adolescents.

Background: This study examines the social epidemiology of sports and extracurricular activities in early adolescents (9-14 years) using a diverse national U.S.

Methods: We examined data from baseline (2016-2018, ages 9-10) to Year 3 follow-up (2019-2021) of the Adolescent Brain and Cognitive Development (ABCD) Study (N = 11,270).

Eating disorders among an online sample of Canadian and American boys and men.

There is a continued need to identify the prevalence and sociodemographic correlates of eating disorders, particularly among the under-researched group of boys and men, to inform prevention and intervention efforts. Data from The Study of Boys and Men, a sample of 1553 boys and men aged between 15 and 35 years in Canada and the United States, were analyzed in 2024. Probable eating disorder diagnoses were identified using a previously established algorithm based on current diagnostic criteria.

Social epidemiology of cardiometabolic risk factors in early adolescents.

Background: To estimate associations between sociodemographic factors and cardiometabolic risk factors among a demographically diverse sample of U.S. adolescents aged 10-14 years.

Prevalence and correlates of muscle dysmorphia in a sample of boys and men in Canada and the United States.

Background: Muscle dysmorphia is a significant mental health condition that has been under-researched in epidemiological, community-based studies. Therefore, this study aimed to identify the prevalence and correlates of probable muscle dysmorphia among a sample of Canadian (n = 784) and American (n = 563) boys and men ages 15-35 years.

Methods: The sample comprised 1,488 boys and men who completed a variety of measures and items to capture sociodemographic characteristics and muscle dysmorphia symptoms.

Body Checking Behaviors Among Boys and Men With Muscle Dysmorphia, Anorexia Nervosa, and Atypical Anorexia Nervosa.

Objectives: First, to compare body checking behaviors among boys and men with probable muscle dysmorphia or probable anorexia nervosa/atypical anorexia nervosa vs. those with neither. Second, to determine whether there is a difference in body checking behaviors between boys and men with probable muscle dysmorphia vs.

Cyberbullying Victimisation Was Associated With Greater Manic Symptoms in Early Adolescence: A Prospective Cohort Study.

Aim: Cyberbullying has been linked to various adverse psychological outcomes, but prospective associations with manic symptoms in early adolescents remain unexplored. We examined the prospective relationship between cyberbullying victimisation and manic symptoms in a diverse cohort of American children and adolescents.

Method: We analysed data from the Adolescent Brain Cognitive Development study from the period 2 follow-up (2018-2020) to the period 3 follow-up (2019-2021).

Sleep and binge eating in early adolescents: a prospective cohort study.

Purpose: To determine the prospective associations between sleep disturbance and binge-eating disorder and behaviors in a national sample of early adolescents in the United States (US).

Methods: We analyzed prospective cohort data from the Adolescent Brain Cognitive Development Study (N = 9428). Logistic regression analyses were used to determine the associations between several sleep variables (e.

Screen time and manic symptoms in early adolescents: prospective findings from the Adolescent Brain Cognitive Development Study.

Purpose: This study aimed to examine prospective associations between screen time and manic symptoms in early adolescents, and the extent to which problematic screen use (characterized by addiction, conflict, relapse, and withdrawal) mediates the association.

Methods: We analyzed prospective cohort data from the Adolescent Brain Cognitive Development Study (N = 9,243; ages 10-11 years in Year 1 in 2017-2019; 48.8% female; 44.

Multiple forms of discrimination and obsessive-compulsive disorder: a prospective cohort study.

Background: Discrimination increases the risk for adverse mental health in minority populations, with studies showing elevated rates of obsessive-compulsive disorder (OCD) in Black adults facing racial discrimination. Yet, there is a lack of longitudinal research on the different forms of discrimination in relation to OCD risk in early adolescence. The objective of this study was to examine the prospective associations between multiple forms of discrimination and OCD in a national sample of U.

Associations between media parenting practices and early adolescent consumption of R-rated movies and mature-rated video games.

Objective: To assess whether specific parent media practices are associated with the consumption of R-rated (restricted) movies and mature-rated video game use in early adolescents.

Methods: Data from the Adolescent Brain Cognitive Development (ABCD) Study (N = 10,054, 12-13 years, Year 3, 2019-2021) were analyzed. Ordinal logistic regression models were used to assess associations among media parenting practices and R-rated movies or mature-rated video game use, adjusting for potential confounders.

Social epidemiology of early adolescent nutrition.

Background: This study aimed to investigate associations between sociodemographic factors and dietary intake among a diverse population of early adolescents ages 10-13 years in the United States.

Methods: We examined data from the Adolescent Brain Cognitive Development (ABCD) Study in Year 2 (2018-2020, ages 10-13 years, N = 10,280). Multivariable linear regression models were conducted to estimate the adjusted associations between sociodemographic factors (age, sex, race and ethnicity, household income, parental education) and dietary intake of various food groups, measured by the Block Kids Food Screener.

Prevalence and Patterns of Social Media Use in Early Adolescents.

Objective: To describe patterns of social media use, including underage use (under 13 years) and sex differences, in a diverse, national sample of early adolescents in the US.

Methods: We analyzed the social media use data in the Adolescent Brain Cognitive Development Study (2019-2021, Year 3), which includes a national sample of early adolescents in the US. Specifically, using Chi-square and t-tests, we compared social media use patterns across demographic characteristics stratified by age and sex.

Exploring body ideal internalization, sociocultural pressures, and probable muscle dysmorphia in Canadian and American boys and men.

This study aimed to determine whether the internalization of body ideals and sociocultural pressures to adhere to body ideals are associated with a greater likelihood of having probable muscle dysmorphia. Cross-sectional data from 1553 boys and men ages 15-35 from Canada and the United States were used. Multiple logistic regression analyses determined the association between the internalization of three body ideals, sociocultural pressures to adhere to body ideals from four sources, and having probable muscle dysmorphia.

Clinical characteristics of hospitalized male adolescents and young adults with avoidant/restrictive food intake disorder (ARFID).

Background: Avoidant/restrictive food intake disorder (ARFID) may result in significant medical sequelae. Compared to youth with eating disorders like anorexia nervosa (AN), youth with ARFID tend to be younger and are more likely to be male. We aim to describe sex differences in clinical characteristics of youth hospitalized for medical complications of ARFID and compare their characteristics with youth hospitalized for anorexia nervosa.

Cyberbullying Victimization Among Transgender and Gender-Questioning Early Adolescents.

Objective: To determine the association between transgender or gender-questioning identity and cyberbullying victimization in a diverse national sample of early adolescents in the United States.

Methods: We analyzed cross-sectional data from the Adolescent Brain Cognitive Development Study (year 3, 2019-2021, 11-14 years old, 48.8% female, 47.

Gender diversity and daily steps: Findings from the Adolescent Brain Cognitive Development Study.

Purpose: To examine the association between multiple dimensions of gender diversity and physical activity (daily steps) in a diverse national sample of early adolescents in the United States.

Methods: This study analyzed Year 2 data from the Adolescent Brain Cognitive Development (ABCD) Study (N = 6038, M=12.0 years).