Faculty
Jason Nagata, MD, MSc
Principal Investigator
Dr. Nagata is an Associate Professor of Pediatrics in the Division of Adolescent and Young Adult Medicine at the University of California San Francisco and affiliated faculty with the Institute for Global Health Sciences. He researches health consequences of adolescent and young adult behaviors and is an expert in body image and eating disorders in boys and men. He has published over 300 articles in academic journals including The Lancet, the Journal of the American Medical Association, and Pediatrics. He is Co-Founder of the International Association for Adolescent Health Young Professionals Network. He serves as Senior Editor of the Journal of Eating Disorders, on the International Advisory Board of The Lancet Child & Adolescent Health, and the Editorial Board of the Journal of Adolescent Health. He is the recipient of the American Academy of Pediatrics Emerging Leader in Adolescent Health Award, the International Association for Adolescent Health Young Professionals Prize, and the Western Society for Pediatric Research Young Investigator Award. He completed a BA in Health and Societies from the University of Pennsylvania, MSc in Medical Anthropology from the University of Oxford, MD and Adolescent Medicine Fellowship from UCSF, and Pediatrics Residency at Stanford University.
Kyle Ganson, PhD, MSW
Assistant Professor
Dr. Ganson is an Assistant Professor at the Factor-Inwentash Faculty of Social Work at the University of Toronto. His research interests include men's health, male eating disorders, and performance-enhancing substances.
- Legal performance-enhancing substances and substance use problems among young adults
- Last word: A call to develop specific medical treatment guidelines for adolescent males with eating disorders
- A call for public policy and research to reduce use of appearance and performance enhancing drugs and substances among adolescents
- Gender and sexual orientation bullying victimization are associated with gun carrying among adolescent boys
- Associations between anxiety and depression symptoms and medical care avoidance during COVID-19
Postdoctoral Fellows
Anita Chaphekar, DO
Fellow Physician
Dr. Chaphekar is a fellow in the Division of Adolescent and Young Adult Medicine and a research fellow in the Department of Clinical Pharmacology at the University of California, San Francisco. She earned her medical degree from the University of North Texas Health Sciences Center and completed her pediatric residency at the University of Oklahoma Health Sciences Center. She is a member of the Society of Adolescent Health and Medicine (SAHM). Her clinical and research interests include the overlap seen with eating disorders and gender diverse youth.
- Sex differences in cholesterol and triglyceride levels among hospitalized adolescents and young adults with eating disorders
- Clinical characteristics of hospitalized male adolescents and young adults with atypical anorexia nervosa
- Sex differences in electrolyte abnormalities indicating refeeding syndrome risk among hospitalized adolescents and young adults with eating disorders
- The social epidemiology of binge-eating disorder and behaviors in early adolescents
- Sex differences in cholesterol and triglyceride levels among hospitalized adolescents and young adults with eating disorders
- Eating disorders in sexual minority adolescents and young adults: Examining clinical characteristics and psychiatric co-morbidities in an inpatient medical setting
- Transgender and other gender diverse adolescents with eating disorders requiring medical stabilization
Julia Raney, MD
Fellow Physician
Dr. Raney is a fellow in the Division of Adolescent and Young Adult Medicine at the University of California San Francisco. She earned her medical degree from Yale School of Medicine and completed her pediatric residency at Lucile Packard Children’s Hospital at Stanford University. Her research interests include health disparities, adverse childhood experiences, resiliency, and adolescent health.
- Mental well-being among adversity-exposed adolescents during the COVID-19 pandemic
- The association between adverse childhood experiences (ACES), bullying victimization, and internalizing and externalizing problems among early adolescents: examining cumulative and interactive associations
- Adverse childhood experiences and binge-eating disorder in early adolescents
- Associations between adverse childhood experiences and early adolescent problematic screen use in the United States
- Adverse childhood experiences and early adolescent cyberbullying in the United States
- Racial discrimination is associated with binge-eating disorder in early adolescents: A cross-sectional analysis
- Associations between adverse childhood experiences and early adolescent physical activity in the United States
- Adverse childhood experiences and sipping alcohol in U.S. Children: Findings from the Adolescent Brain Cognitive Development study
- Associations between adverse childhood experiences, adolescent screen time and physical activity during the COVID-19 pandemic
Abubakr Al-shoaibi, PhD
Postdoctoral Fellow
Dr. Al-shoaibi is a postdoctoral fellow in the the Division of Adolescent and Young Adult Medicine at the University of California San Francisco. He earned his masters and doctoral degrees in public health from the Graduate School of Medicine at Nagoya University, Japan. His research interests include adolescent health, cardiovasuclar disease, and diabetes.
- Social media use and alcohol sipping in early adolescents: A prospective cohort study
- Social epidemiology of online dating in U.S. early adolescents
- Sociodemographic associations with blood pressure in 10-14-year-old adolescents
- Associations between media parenting practices and early adolescent screen use
- The association between adverse childhood experiences (ACES), bullying victimization, and internalizing and externalizing problems among early adolescents: Examining cumulative and interactive associations
- Associations of contemporary screen time modalities with early adolescent nutrition
- Social epidemiology of the Mediterranean-dietary approaches to stop hypertension intervention for neurodegenerative delay (MIND) diet among early adolescents: The Adolescent Brain Cognitive Development study
- Associations between adverse childhood experiences and early adolescent physical activity in the United States
- The social epidemiology of binge-eating disorder and behaviors in early adolescents
- Associations between adverse childhood experiences and early adolescent problematic screen use in the United States
- Racial discrimination is associated with binge-eating disorder in early adolescents: A cross-sectional analysis
- Higher blood pressure and weight observed among early adolescents during the COVID-19 pandemic.
- Association of cyberbullying victimization and substance initiation: The Adolescent Brain Cognitive Development (ABCD) study
- The association between family environment and subsequent risk of cyberbullying victimization in adolescents
- Associations between sexual orientation and early adolescent screen use: Findings from the Adolescent Brain Cognitive Development (ABCD) study
- Sexual orientation disparities in early adolescent sleep: Findings from the Adolescent Brain Cognitive Development study
Kirk Fergus, MD, MAS
Resident Physician
Dr. Fergus is a surgery resident physician at the University of California San Francisco, where he completed medical school and a masters degree in clinical research. He graduated from Harvard University with a degree in social studies. He studies young adult risk behaviors in the National Longitudinal Study of Adolescent to Adult Health.
- Young adult healthcare exposure and future opioid misuse: A prospective cohort study
- Health care utilization in young adults with childhood physical disabilities: A nationally representative prospective cohort study
- Eating disorders and disordered eating behaviors among women: Associations with sexual risk
Chloe Cattle, MD
Resident Physician
Dr. Cattle is an internal medicine resident physician at the University of California San Francisco, where she completed medical school. She graduated from the University of California, Los Angeles with a degree in Psychobiology. Her research examines eating disorders and muscle dysmorphia in sexual and gender minority populations in The PRIDE Study.
- Food insufficiency and mental health service utilisation in the USA during the COVID-19 pandemic
- Appearance and performance-enhancing drugs and supplements (APEDS): Lifetime use and associations with eating disorder and muscle dysmorphia symptoms among cisgender sexual minority people
- Associations among romantic and sexual partner history and muscle dysmorphia symptoms, disordered eating, and appearance- and performance-enhancing drugs and supplement use among cisgender gay men
- Young adult healthcare exposure and future opioid misuse: A prospective cohort study
- Validation and measurement invariance of the Muscularity-Oriented Eating Test among Brazilian men and women
- Validation of the Muscle Dysmorphic Disorder Inventory (MDDI) in Brazilian women
- Psychometric evaluation of the Muscle Dysmorphic Disorder Inventory (MDDI) among gender-expansive people
- Screen time use among us adolescents during the COVID-19 pandemic: Findings from the Adolescent Brain Cognitive Development (ABCD) study
- Community norms for the Eating Disorder Examination Questionnaire (EDE-Q) among gender-expansive populations
- Psychometric evaluation of the Muscle Dysmorphic Disorder Inventory (MDDI) among cisgender gay men and cisgender lesbian women
- Community norms of the Muscle Dysmorphic Disorder Inventory (MDDI) among cisgender sexual minority men and women
- Sex differences in refeeding among hospitalized adolescents and young adults with eating disorders
Medical Students
Sana Alsamman, BA
Medical Student
Sana is a medical student at the University of California, San Francisco. She graduated from University of California, Berkeley with a degree in Molecular and Cell Biology. Her research examines physical activity, Fitbit steps, and cardiovascular disease risk factors in the Adolescent Brain Cognitive Development Study.
- Association of physical activity and screen time with cardiovascular disease risk in the Adolescent Brain Cognitive Development Study
- Social epidemiology of Fitbit daily steps in early adolescence
- Higher blood pressure and weight observed among early adolescents during the COVID-19 pandemic
- Association of physical activity and screen time with body mass index among U.S. adolescents
- Lower daily steps among U.S. adolescents during the Covid-19 pandemic: Objective findings from the Adolescent Brain Cognitive Development study
Christopher Lee, BA
Medical Student
Chris is a medical student at the University of California, San Francisco. He graduated from the University of Pennsylvania with a degree in Biology. His research examines screen time, physical activity, and cardiovascular disease risk factors as well as sexual orientation health disparities in the Adolescent Brain Cognitive Development Study.
- Association of physical activity and screen time with cardiovascular disease risk in the Adolescent Brain Cognitive Development Study
- Association of physical activity and screen time with body mass index among U.S. adolescents
- Associations between sexual orientation and early adolescent screen use: Findings from the Adolescent Brain Cognitive Development (ABCD) study
- Sexual orientation disparities in early adolescent sleep: Findings from the Adolescent Brain Cognitive Development study
- Screen time from adolescence to adulthood and cardiometabolic disease: A prospective cohort study
Anthony Nguyen, BS
Medical Student
Anthony is a medical student at the University of California, San Francisco. He graduated from the University of California, Davis with a degree in Biological Sciences and additionally dived deep into the joys of research through the American Chemical Society and biochemistry laboratories at the University of the Pacific. Today, he holds paramount interest in utilizing the skills he's learned in pursuit of clinical research that can improve human health. His research examines gender differences in medical complications of eating disorders among adolescents and young adults.
- Sex differences in electrolyte abnormalities indicating refeeding syndrome risk among hospitalized adolescents and young adults with eating disorders
- Clinical characteristics of hospitalized male adolescents and young adults with atypical anorexia nervosa
- Sex differences in cholesterol and triglyceride levels among hospitalized adolescents and young adults with eating disorders
- Sex differences in refeeding among hospitalized adolescents and young adults with eating disorders
- Sex differences and associations between zinc deficiency and anemia among hospitalized adolescents and young adults with eating disorders
- Assessment of vitamin D among male adolescents and young adults hospitalized with eating disorders
Omar Sajjad, MS
Medical Student
Omar is a medical student at Dartmouth College. He graduated from the University of California, San Diego with a double major in Biology and Global Health. He later received his M.S. in Global Health from the University of California, San Francisco. His research focuses on screen time and alcohol use in the Adolescent Brain and Cognitive Development (ABCD) Study.
- Social media use and alcohol sipping in early adolescents: A prospective cohort study
- Social epidemiology of early adolescent alcohol expectancies
- Adolescent individual, school, and neighborhood influences on young adult diabetes risk
- Associations between adverse childhood experiences and early adolescent problematic screen use in the United States
- Progress and challenges of HIV and other STIs in adolescents and young adults
- Racism, diminished returns of socioeconomic resources, and Black middle-income children's health paradox-Reply
- Adverse childhood experiences and sipping alcohol in U.S. children: Findings from the Adolescent Brain Cognitive Development study
- Problematic social media use and alcohol expectancies in early adolescents
- Social epidemiology of early adolescent problematic screen use in the United States
- Prevalence of perceived racism and discrimination among U.S. children aged 10 and 11 Years: The Adolescent Brain Cognitive Development (ABCD) study
- Disparities across sexual orientation in obstructive airway disease among U.S. adults
Gurbinder Singh, BS
Medical Student
Gary is a medical student at the University of California San Francisco. He graduated from University of California, Merced with a degree in Microbiology and Immunology. His research examines screen-associated behaviors and various outcomes in the Adolescent Brain Cognitive Development Study.
- Associations between adverse childhood experiences and early adolescent problematic screen use in the United States
- Bedtime screen use behaviors and sleep outcomes: Findings from the Adolescent Brain Cognitive Development (ABCD) study
- Cyberbullying and sleep disturbance among early adolescents in the U.S.
- Adverse childhood experiences and early adolescent cyberbullying in the United States
- Social epidemiology of early adolescent problematic screen use in the United States
- Social epidemiology of early adolescent cyberbullying in the United States
Gabriel Zamora, BA
Medical Student
Gabriel is a medical student at the University of California, San Francisco. He graduated from the University of California, Riverside with a degree in psychology. His overarching goal is to carry out research to improve the mental health of children, adolescents, and their families. His research examines adolescent screen time and mental health in the Adolescent Brain Cognitive Development (ABCD) Study.
- Social media use and alcohol sipping in early adolescents: A prospective cohort study
- Social epidemiology of early adolescent alcohol expectancies
- Screen time and obsessive-compulsive disorder among children 9-10 years old: A prospective cohort study
- Problematic social media use and alcohol expectancies in early adolescents
- Adverse childhood experiences and sipping alcohol in U.S. children: Findings from the Adolescent Brain Cognitive Development study
Graduate Students
Priya Balasubramanian, BA
MPH Student
Priya is a current MPH student at UC Berkeley specializing in Infectious Disease and Vaccinology with a focus on Biostatistics. She completed her undergraduate degree in Biology at Case Western Reserve University, Cleveland. Her research interests include developing mathematical models and predictive analytics to study socio-behavioral trends and disease surveillance.
Ammal Bashir, BS
Dual MPH/DO Student
Ammal is a dual MPH/DO student concurrently pursuing her DO at the University of New England and her MPH in Epidemiology at the Icahn School of Mount Sinai Graduate School of Biomedical Sciences. Her research interests include nutritional disparities in adolescents, chronic disease implications of epidemiological studies, and sociobehavioral health in minority youth.
Shayna Weinstein, BA
MPH Practicum Student
Shayna is a 4+1 Master of Public Health student at the University of California, Berkeley. She graduated from her undergraduate degree at UC Berkeley with a B.A. in Public Health and a minor in Nutritional Sciences. She plans to attend medical school. Her research examines ACE’s, nutrition, cardiovascular risk, and mental health among adolescents for the advancement of clinical guidelines.
- Mental well-being among adversity-exposed adolescents during the COVID-19 pandemic
- Association of physical activity and screen time with cardiovascular disease risk in the Adolescent Brain Cognitive Development Study
- Associations of contemporary screen time modalities with early adolescent nutrition
- Social epidemiology of the Mediterranean-dietary approaches to stop hypertension intervention for neurodegenerative delay (MIND) diet among early adolescents: The Adolescent Brain Cognitive Development study
Christiane Helmer, BA
MPH Student
Christiane Helmer is a 4+1 MPH student at UC Berkeley, concentrating in Maternal, Child, and Adolescent Health. She earned her bachelor's degrees in Public Health and Molecular and Cell Biology. Her research interests include youth mental health, eating disorders, and reproductive health, and she aspires to become a physician.
Karen Li, BA
MPH Student
Karen is a 4+1 MPH student at Berkeley with a concentration in epidemiology and biostatistics. She graduated with her BA in Public Health from UC Berkeley and plans to attend medical school in the future. Her research interests include clinical epidemiology, nutrition, and cardiovascular disease.
Jennifer Wong, BS
MPH Student
Jennifer is a current MPH student at UC Berkeley specializing in epidemiology and biostatistics. She earned her B.S. in Public Health from the University of California, Irvine. Her research interests include ACEs, cardiovascular outcomes, and reproductive health.
Undergraduate Students
Ashley Saldana
Undergraduate Student
Ashley is an undergraduate premedical student studying Chemistry and Music at the University of San Francisco with a background in mental health and disability rights advocacy. Her research interests include eating disorders and mental health, specifically in child and adolescent populations.
Jonanne Talebloo
Undergraduate Student
Jonanne is an undergraduate student at the University of California, Berkeley studying Molecular and Cell Biology. Her interests include health education outreach as well as research in cardiovascular disease risk, mental health, and screen use.
Lab Alumni
Deepika Parmar, MD, MPH
Dr. Parmar is a physician at Kaiser Permanente and was a fellow in the Division of Adolescent and Young Adult Medicine at the University of California San Francisco. Dr. Parmar earned her medical degree from the University of Missouri and completed her pediatric residency training at Kaiser Permanente Oakland Medical Center. She completed her Masters at UC Berkeley School of Public Health. She is a fellow of the American Academy of Pediatrics (FAAP) and a member of the Society for Adolescent Health and Medicine (SAHM). She has a passion for serving sexual and gender minority youth and this has become her area of focus for research.
Jonathan Chu, MD
Medical Student
Jonathan is a medical student at the University of California San Francisco. He graduated from University of California, Berkeley with a degree in Molecular and Cellular Biology. His research examines weight control behaviors and body mass index trajectories in the National Longitudinal Study of Adolescent to Adult Health.
- Adverse childhood experiences and binge-eating disorder in early adolescents
- Food insecurity and binge-eating disorder in early adolescence
- The prevalence of preadolescent eating disorders in the United States
- Cyberbullying and eating disorder symptoms in US early adolescents
- Sociodemographic correlates of contemporary screen time use among 9- and 10-year-old children
- Screen time and obsessive-compulsive disorder among children 9-10 years old: A prospective cohort study
- Disparities across sexual orientation in obstructive airway disease among U.S. adults
- Screen time and suicidal behaviors among U.S. children 9-11 years old: a prospective cohort study
- Contemporary screen time usage among children 9-10-years-old is associated with higher body mass index percentile at 1-year follow-up: A prospective cohort study
- Weight goals, disordered eating behaviors, and BMI trajectories in U.S. young adults
- Contemporary screen time modalities and disruptive behavior disorders in children: A prospective cohort study
- Food insufficiency and mental health in the U.S. during the COVID-19 pandemic
- Contemporary screen time modalities among children 9–10 years old and binge‐eating disorder at one‐year follow‐up: A prospective cohort study
- Parent-adolescent discrepancies in adolescent recreational screen time reporting during the COVID-19 pandemic
Lynhea Anicete, MS
Graduate Student
Lynhea is a recent graduate of the masters in global health sciences program at the University of California, San Francisco. She studies household composition and mental health among HIV-affected households in the Shamba Maisha study.
Paola Bojorquez-Ramirez, MPH
Graduate Student Epidemiology Program
Paola is a Master of Public Health graduate at the Yale School of Public Health in the Department of Chronic Disease Epidemiology. She graduated from The University of Texas at Austin with a Bachelor of Science in Public Health. Her overarching goal is to carry out epidemiological research to improve the health of women, infants, children, and adolescents. Her research examines gender differences in medical complications of eating disorders among adolescents and young adults.
- Eating disorders in sexual minority adolescents and young adults: Examining clinical characteristics and psychiatric co-morbidities in an inpatient medical setting
- Sex differences in refeeding among hospitalized adolescents and young adults with eating disorders
- Adverse childhood experiences and maternal disability: Findings from the North Dakota and South Dakota PRAMS, 2019
- Food insecurity and oral health care experiences during pregnancy: Findings from the Pregnancy Risk Assessment Monitoring System
- Sex differences and associations between zinc deficiency and anemia among hospitalized adolescents and young adults with eating disorders
- Assessment of vitamin D among male adolescents and young adults hospitalized with eating disorders
Catherine Cortez, MPH
Graduate Student Epidemiology Program
Catherine is a Master of Public Health graduate at the University of California, Los Angeles in the Department of Epidemiology. She graduated from University of California, San Diego with a Bachelor of Science in Public Health. Her research examines adolescent screen time, physical activity, and mental health in the Adolescent Brain Cognitive Development (ABCD) Study.
- Moderate-to-vigorous intensity physical activity among U.S. adolescents before and during the COVID-19 pandemic: Findings from the Adolescent Brain Cognitive Development Study
- Screen time use among U.S. adolescents during the COVID-19 pandemic: Findings from the Adolescent Brain Cognitive Development (ABCD) study
- Parent-adolescent discrepancies in adolescent recreational screen time reporting during the COVID-19 pandemic
- Moderate-to-vigorous intensity physical activity among adolescents in the USA during the COVID-19 pandemic
- Parent-adolescent agreement in reported moderate-to-vigorous intensity physical activity during the COVID-19 pandemic
Natalia Smith, MPH
Natalia is a second-year Master of Public Health student at the University of California, Berkeley. She is a clinical dietitian, who graduated from the Universidad Ibero, Mexico City. Her interests lie in data driven solutions to improve maternal, child, and adolescent health. Her research examines longitudinal data on adolescent mental health, physical activity, nutrition, and screen time use.
- Social media use and alcohol sipping in early adolescents: A prospective cohort study
- Social epidemiology of early adolescent alcohol expectancies
- Social epidemiology of Fitbit daily steps in early adolescence
- Problematic social media use and alcohol expectancies in early adolescents
- Bedtime screen use behaviors and sleep outcomes: Findings from the Adolescent Brain Cognitive Development (ABCD) study
- Association of physical activity and screen time with body mass index among U.S. adolescents
- Adverse childhood experiences and sipping alcohol in U.S. Children: Findings from the Adolescent Brain Cognitive Development study
Samuel Benabou
Undergraduate Student
Sam is an undergraduate student at Stanford University studying Human Biology. His research examines concussions in adolescents and young adults and the impact of the COVID-19 pandemic on young adults.
- Associations between interpersonal violence victimisation and concussions among U.S. college students
- Job insecurity and symptoms of anxiety and depression among U.S. young adults during COVID-19
- Prevalence of perceived racism and discrimination among U.S. children aged 10 and 11 years: The Adolescent Brain Cognitive Development (ABCD) study