Conference Program

9:00

Biomarkers for Anorexia nervosa Hubertus Himmerich. King's College London

10:00

Rethinking Eating Disorders: Bold New Targets, Treatments, and Technologies Aaron Keshen. Dalhousie University/Nova Scotia Health

10:20

Brain Energy Metabolism as a Transdiagnostic Treatment Target in Eating Disorders Guido Frank. University of California

10:40

Neuromodulation in Eating Disorders D. Blake Woodside. University of Toronto

11:00

Translational Science to Develop Mechanism Based Pharmacotherapy for Anorexia Nervosa Joanna Steinglass. Columbia University/New York State Psychiatric Institute

11:20

Q&A .

1:00

Investigating Food Insecurity and Eating Disorder Pathology in Adolescents, Young Adults, and Older Adults: Evidence from UK Cohort Studies Akansha Naraindas1, Vivienne Hazzard2, Francesca Solmi3, Fidan Turk1. 1Department of Psychology, University of Exeter, Exeter, United Kingdom.2Charles Stewart Mott Department of Public Health, College of Human Medicine, Michigan State University, Flint, MI, USA.3Division of Psychiatry, University College London, London, United Kingdom

1:15

Anticipatory and consummatory responses to touch and food rewards in anorexia nervosa Fiona Eslami Tehrani1, 2, Yanick Lahaye1, 2 , Emilio Chiappini3, Philipp Lazen2, Ema LaziA2, Bianca Miculescu2, Sarah Pernegger2, Annika Teppert2, Gudrun Wagner2, Konstantin Kopp2, Wolfgang Bogner2, Michael Zeiler2, Andreas Karwautz2, Giorgia Silani1. 1University of Vienna, Vienna, Austria.2Medical University of Vienna, Vienna, Austria.3Leibniz Research Centre for Working Environment and Human Factors (IfADo), Dortmund, Germany

1:30

Trends in disordered eating and weight reducing behaviours from 1995 to 2019 in a Norwegian adolescent cohort – The Young-HUNT Study Kirsti KvalAcy1, 2, 3, Nadia Micali4, 5, 6, Trine Tetlie Eik-Nes7. 1 HUNT Research Centre, Department ofAnPublic Health andAnNursing, Faculty ofAnMedicine andAnHealth Sciences, AnNorwegian University of Science and Technology, NTNU, Trondheim, Norway.2Centre forAnSami Health Research, Department ofAnCommunity Medicine, Faculty ofAnHealth Sciences, UiT The Arctic University ofAnNorway, TromsAc, Norway.3Levanger Hospital, Nord-TrAcndelag Hospital Trust, Levanger, Norway.4Institute of Biological Psychiatry, Mental Health Center Sct. Hans, Copenhagen University Hospital, Mental Health Services Copenhagen, Roskilde, Denmark.5Center for Eating and feeding Disorders Research, Mental Health Center Ballerup, Copenhagen University Hospital, Mental Health Services Copenhagen, Copenhagen, Denmark.6Great Ormond Street Institute of Child Health, University College London, London, United Kingdom.7Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Trondheim, Norway

1:45

Gut microbiome alterations in adolescents with anorexia nervosa are linked to weight loss severity and influenced by geographic origin Nadia Andrea Andreani1, Lara Keller2, Michael Zeiler3, Karlijn Kooij4, Benny van der Vijgh5, Andreas Karwautz3, Roger Adan4, Beate Herpertz-Dahlmann6, Astrid Dempfle7, Jochen Seitz2, John Baines8. 1Department of Biology and Biotechnology, Rome, Italy.2Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, LVR University Hospital Essen, Essen, Germany, Essen, Germany.3Eating Disorders Care a Research Unit at the Department of Child and Adolescent Psychiatry, Medical University of Vienna, Vienna, Austria, Vienna, Austria.4UMC Utrecht, Utrecht, Netherlands.5Altrecht Eating Disorders Rintveld, Wenshoek, Netherlands.6Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, RWTH Aachen University, Aachen, Germany, Aachen, Germany.7Institute of Medical Informatics and Statistics, Christian Albrechta, Kiel, Germany.8Institute for Experimental Medicine, Max Planck Institute for Evolutionary Biology, Kiel University, Kiel, Germany, Kiel, Germany

2:00

Testing a Biobehavioral Model for Predicting Illness Outcomes in Bulimic Syndromes Pamela Keel1, Lindsay Bodell2, Jonathan Appelbaum1, Diana Williams3. 1Florida State University, Tallahassee, FL, USA.2University of Western Ontario, London, ON, Canada.3Claremont McKenna College, Claremont, CA, USA

2:15

Identifying Candidate Biomarkers of Physiological Recovery in Anorexia Nervosa and Atypical Anorexia Nervosa Blair Uniacke1, 2, Joanna Steinglass1, 2, Pablo Del Sol Calderon1, 3, Alexandra Allam1, Veronica Lee1, Janet Schebendach1, Evelyn Attia1, 4, B. Timothy Walsh1. 1Columbia University, New York, NY, USA.2New York State Psychiatric Institute, New York, NY, USA.3Complutense University, Madrid, Spain.4Weill Cornell Medicine, New York, NY, USA

2:30

Blood DNA methylation patterns in anorexia nervosa: A longitudinal study on the role of illness duration and symptom remission Linda Booij1, 2, Zsofia Nemoda 1, Kevin Casey1, Edith Breton3, Howard Steiger 1, 2. 1Eating Disorders Continuum, Douglas Mental Health University Institute, Montreal, QC, Canada.2Department of Psychiatry, McGill University, Montreal, QC, Canada.34. Department of Fundamental Sciences, UniversitAc du QuAcbec An Chicoutimi, Chicoutimi, QC, Canada

1:00

Feasibility, acceptability, and outcomes of group CBT-T: A naturalistic mixed-methods comparison with individual CBT-T Laura Dixon1, Anastasia Harris1, Victoria Taylor1, Lily Spoozak1, Sara Bartel1, Susan Gamberg1, 2, Nami Trappenberg1, Colby Price1, Navjot Sandila3, Elena Koning2, Sarrah I. Ali4, Erin Piercy1, Glenn Waller5, Aaron Keshen1, 2. 1Nova Scotia Provincial Eating Disorder Service, Nova Scotia Health, Halifax, NS, Canada.2Department of Psychiatry, Dalhousie University, Halifax, NS, Canada.3Research Methods Unit, Nova Scotia Health, Halifax, NS, Canada.4Department of Psychology, Florida State University, Tallahassee, FL, USA.5Department of Psychology, University of Warwick, Coventry, United Kingdom

1:15

The clinical efficacy of probiotic administration compared to placebo in adolescents with anorexia nervosa: A randomized controlled trial Michael Zeiler1, Nadia Andrea Andreani2, 3, Kathrin Kollndorfer4, Konstantin Kopp1, Julia Klang1, Florian Ph. S. Fischmeister4, Gudrun Wagner1, Kathrin Sevecke5, Lara Keller6, 7, Astrid Dempfle8, John Baines2, Jochen Seitz7, Beate Herpertz-Dahlmann6, Andreas Karwautz1. 1Eating Disorders Care a Research Unit, Department for Child and Adolescent Psychiatry, Medical University of Vienna, Vienna, Austria.2Institute for Experimental Medicine, Max Planck Institute for Evolutionary Biology, Kiel University, PlApn, Germany.3Department of Biology and Biotechnology qCharles Darwinq, Sapienza University of Rome, Rome, Italy.4Developmental and Interventional Neuroimaging Lab, Department of Biomedical Imaging and Imagea, Vienna, Austria.5Department of Child and Adolescent Psychiatry, Medical University of Innsbruck, Innsbruck, Austria.6Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, University Hospital RWTH Aachen, Aachen, Austria.7Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, LVR University Hospital Essen, Essen, Germany.8Institute of Medical Informatics and Statistics, Kiel University, Kiel, Germany

1:30

Wearable-Based Activity Monitoring and Therapeutic Feedback for Movement Regulation in Inpatients With Anorexia Nervosa: A Controlled Feasibility Pilot Study Michael Hollauf1, 2, 3, Christian Fricke1, Claudia MApnch1, Alexander Heimbeck1, Sandra Konik3, Ulrich Cuntz1, 2, Ulrich Voderholzer1, 4, 5. 1SchApn Klinik Roseneck, Prien am Chiemsee, Germany.2Paracelsus Medical University, Salzburg, Austria.3 Department for Health Sciences, Medicine and Research, University for Continuing Education Krems, Krems an der Donau, Austria.4Department of Psychiatry and Psychotherapy, LMU University Medicine, Munich, Germany.5Department of Psychiatry and Psychotherapy, Albert-Ludwigs-University Freiburg, Freiburg, Germany

1:45

Pilot results demonstrating promise for a new, co-designed program for people with inflammatory bowel disease to reduce eating disorder psychopathology and improve body image and wellbeing Mia L. Pellizzer1, Maya Jabs1, RAcme Mountifield2, Ruth Prosser2, Ivanka Prichard3. 1Flinders University Institute for Mental Health and Wellbeing, Blackbird Initiative, Adelaide, Australia.2Department of Gastroenterology, Flinders Medical Centre, Adelaide, Australia.3Caring Futures Institute, Embrace Impact Lab, Flinders University, Adelaide, Australia

2:00

Care-by-Claire: Addressing Eating Disorders and Symptoms of Burnout and Stress with an App-Based Program-Guided Digital CBT for Patients with Eating Disorders. A Real-World Study Klara Edlund1, Niklas Forsberg2, Solfrid Bratland-Sanda3, Ata Ghaderi1. 1Karolinska Institutet, Stockholm, Sweden.2University of Gothenburg, Gothenburg, Sweden.3University of South-East Norway, Notodden, Norway

2:15

Ecological Momentary Interventions in the Management of Eating Disorders and Obesity: A Systematic Review Wenlu Mao1, Ricarda Schmidt2, Emily K. Presseller3, Adrienne Juarascio4, Anja Hilbert1. 1Behavioral Medicine Research Unit, Department of Psychosomatic Medicine and Psychotherapy, University Medical Center Leipzig, Leipzig, Germany.2Department of Child and Adolescent Psychiatry, Psychotherapy and Psychosomatics, University Hospital Leipzig, Leipzig, Germany.3Department of Biomedical Data Science and Department of Psychiatry, Geisel School of Medicine at Dartmouth, Hanover, NH, USA.4Oregon Research Institute, Eugene, OR, USA

2:30

Restoring Reward in Recovery: A Randomized, Controlled Trial of Positive Affect Treatment for Post-Acute Anorexia Nervosa Ann F. Haynos1, 2, Olivia Chapman1, Lisa M. Anderson2, Michelle G. Craske3, 4, Carol B. Peterson2. 1Virginia Commonwealth University, Department of Psychology, Richmond, VA, USA.2University of Minnesota, Department of Psychiatry and Behavioral Sciences, Minneapolis, MN, USA.3University of California, Los Angeles, Department of Psychology, Los Angeles, CA, USA.4University of California, Los Angeles, Department of Psychiatry a Biobehavioral Sciences, Los Angeles, CA, USA

3:15

Efficacy of MANTRa compared to treatment as usual in adolescents and young adults with anorexia nervosa in Austria Gudrun Wagner. Medical University of Vienna

3:37

Family therapy for AN across the age span Julian Baudinet. King's College London

4:00

A randomised sham-controlled feasibility trial of intermittent theta burst stimulation for young people with persistent anorexia nervosa: the RaISE trial Amelia Hemmings. King's College London

4:22

Home treatment (HoT) is more effective than weight-restoring inpatient treatment (IP) in adolescent anorexia nervosa (AN) results of a large multicenter RCT at one year follow-up Beate Herpertz-Dahlmann. Aachen University

ASSESSMENT/CLASSIFICATION

200

Longstanding eating disorders: Clinical characteristics and shortterm responses to outpatient treatment Linda Booij1, 2, LAca Larochelle1, Samantha Ginsberg1, Howard Steiger 1, 2. 1Eating Disorders Continuum, Douglas Mental Health University Institute, Montreal, QC, Canada.2Department of Psychiatry, McGill University, Montreal, QC, Canada

201

Transforming percentage of median body mass index (%mBMI) scores into corresponding BMI z-scores yields discrepancies for age and sex: Implications for pediatric eating disorder researchers and clinicians Linus Imken1, Abigail Matthews2, Johannes Hebebrand3. 1Department of Child and Adolescent Psychiatry, CharitAc a, Berlin, Germany.2Department of Psychiatry and Psychology, Mayo Clinic, Rochester, MN, USA.3Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, University Hospital Essen, University of Duisburg-Essen, Essen, Germany

202

Trending Down, Complexity Up: %TGW Trajectories as a Red Flag for AN-PLUS Debra K. Katzman1, 2, 3, Anne Hughes1, 3, 4, Lucie Turner1.2.5, Marian Coret1, 2, , Tania Turrini1, 6, Tim Guimond2, 7, Melissa McCradden8. 1Hospital for Sick Children, Toronto, ON, Canada.2University of Toronto, Toronto, ON, Canada.3Research Institute, Hospital for Sick Children, Toronto, ON, Canada.4Department of Social Work, Toronto, ON, Canada.5Department of Bioethics, Toronto, ON, Canada.6Department of Clinical Dietetics, Toronto, ON, Canada.7HQ Health Hub Addictions Division, Centre for Addictions and Mental Health, Toronto, ON, Canada.8Womena, Adelaide, Australia

203

The accuracy and suitability of eating disorder screening tools for binge eating disorder and bulimia nervosa in a primary care setting: a systematic review and narrative summary Stella KozmAcr1, 2, Ruichen Yin4, Joseph Evans3, Alex Burns1, 5, Jane R. Smith1. 1University of Exeter Medical School, University of Exeter, Exeter, UK, Exeter, United Kingdom.2Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, United Kingdom.3The Medical School, University of Sheffield, Sheffield, United Kingdom, Sheffiel, United Kingdom.4Department of Psychology, University of Exeter, Exeter, UK, Oxford, United Kingdom.5Three Spires Medical Practice, Truro, Cornwall, United Kingdom, Truro, United Kingdom

204

Validation of the Eating Disorder Assessment for DSM-5 (EDA-5) in a unified Portuguese version from Brazil and Portugal Cassia Molin1, Rita Ramos2, Carlos E. F. Moraes1, JosAc C. AppolinAirio1, Paulo PP Machado2. 1Federal University of Rio de Janeiro, Psychiatry Institute, Rio de janeiro, Brazil.2University of Minho, School of Psychology, Braga, Portugal

205

Factor Structure of the Parent-Completed Child Inflexibility Index to Assess Eating-Related Inflexibility Throughout Childhood Brianne N. Richson1, Hana F. Zickgraf2, Courtney E. Breiner3. 1Sanford Center for Biobehavioral Research, Fargo, ND, USA.2Rogers Behavioral Health Research Center, Oconomowoc, WI, USA.3Children's Healthcare of Atlanta, Atlanta, GA, USA

206

No Difference in Weighing Tendencies in Restrictive- and Binge-Type Eating Disorders; Lower Approach Motivation in ARFID Stefania L. Yee1, Jennifer J. Thomas1, Kamryn T. Eddy1, Kyle P. De Young2, Paraskevi. E Kambanis1. 1Massachusetts General Hospital, Boston, MA, USA.2University of Wyoming, Laramie, WY, USA

BIOLOGICAL/RISK FACTORS

207

Fear of Negative Evaluation Predicts Eating Disorder Psychopathology in a Mixed-Sex Community Sample of Adolescents Victoria Burmester, Alexandra Musat, Dasha Nicholls. Imperial College London, London, United Kingdom

208

Problematic Eating Behavior and Gut Dysbiosis in Binge Eating Disorder and Obesity Eva ConceiAsApo1, Catarina Gomes1, 2, Abigail GonzAilez2, Clara GuimarApes1, Adriana Sampaio3, Clarisse Nobre2, 4. 1University of Porto, Faculty of Psychology and Education Sciences, Porto, Portugal.2CEB - Centre of Biological Engineering, University of Minho, Braga, Portugal.3CIPsi a, Braga, Portugal.4LABBELS - Associate Laboratory, Braga, Portugal

209

Gut microbiome profiles in avoidant/restrictive food intake disorder Stefana Darvariu1, Elisa Asanza2, Brittani Martino2, Jonathan Xiang2, Stefania Yee2, Lauren Breithaupt2, Kendra R. Becker2, Helen Burton-Murray2, Stephanie Harshman2, Madhusmita Misra2, Laura M. Holsen2, Kamryn T. Eddy2, Jennifer J. Thomas2, Elizabeth Lawson2, Kenneth Klingenberg Barfod 3, Nadia Micali1. 1Center for Eating and feeding Disorders Research (CEDaR), Mental Health Center Ballerup, Copenhagen University Hospital a, Copenhagen, Denmark.2Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA.3University of Copenhagen, Department of Food Science, Section for Food Microbiology, Gut Health, and Fermentation, Copenhagen, Denmark

210

Structural Sexism and Eating Disorder Symptom Severity: Testing Relationships in a Multi-Diagnostic, Treatment-Enrolled Sample Haley A. Henriksen1, Alan Duffy2, Sophie Abber3, 4, Renee D. Rienecke2, Thomas Joiner3, Lauren N. Forrest1. 1Department of Psychology, University of Oregon, Eugene, OR, USA.2Eating Recovery Center and Pathlight Mood a Anxiety Centers, Denver, CO, USA.3Department of Psychology, Florida State University, Tallahassee, FL, USA.4University of California, San Diego Eating Disorders Center, San Diego, CA, USA

211

Unravelling the complex relationship between loneliness and eating disorders in young people: An ecological momentary assessment study Basak Ince1, Carina Kuehne1, Rosie Tatham1, Mariana Lopes1, Callum Bryson1, Caroline Le Luel1, Matthew D Phillips2, Lucy Gallagher1, Sarah Moody3, Delia Fuhrmann4, Nicholas Cummins5, Helen Sharpe3, Ulrike Schmidt1, 6. 1Centre for Research in Eating and Weight Disorders, Department of Psychological Medicine, Institute of Psychiatry, Psychology a Neuroscience, Kinga, London, United Kingdom.2Department of Psychology, School of Life Sciences and the Environment, Royal Holloway, University of London, London, United Kingdom.3School of Health in Social Science, University of Edinburgh, Edinburgh, United Kingdom.4Department of Psychology, Kinga, London, United Kingdom.5Department of Biostatistics a Health Informatics, Kinga, London, United Kingdom.6South London and Maudsley NHS Foundation Trust, London, United Kingdom

212

Endocannabinoid, Reward, and Neuroaxonal Pathways in Anorexia Nervosa and Avoidant/Restrictive Food Intake Disorder Katarzyna Jowik-Krzeminska1, 2, Marta Tyszkiewicz-Nwafor1, 2. 1Department of Adult Psychiatry at Poznan University of Medical Sciences, Poznan, Poland.2Department of Adult Psychiatry at Poznan University of Medical Sciences, Poznan, Poland

213

Risk Factors and Prodromal Symptoms that Predict Future Onset and Persistence of Atypical Anorexia Nervosa Eric Stice1, Felix Zhan1, Sareena Shah1, Yuko Yamamiya2. 1Stanford University, Stanford, CA, USA.2Temple University, Japan Campus, Tokyo, Japan

214

Subjective versus Objective Executive Function Measures in Patients with Eating Disorders Siri Weider1, 2, Tora Thorsrud1, 2, Camilla L Dahlgren3, Odin Hjemdal1, Linda Thorsen1. 1Department of Psychology, Faculty of Social and Educational Sciences, Norwegian University of Science and Technology (NTNU), Trondheim, Norway.2Eating Disorder Unit, Department of Psychiatry, Levanger Hospital, Nord-TrAcndelag Hospital Trust, Levanger, Norway.3Department of Psychology, Oslo New University College, Oslo, Norway

COMORBIDITY

215

The triangulation between positive body image, eating disorder symptoms, and depressive symptoms in adolescence – a network analysis Laura M. Derks, Alicia S. Ridder, Martin Holtmann, Tanja Legenbauer. LWL University Hospital Hamm of the Ruhr-University Bochum, Hamm, Germany

216

A Network-Based Examination of Shared and Distinct Psychological Features in Bulimic-Spectrum and Behavioral Addictive Disorders Susana Jimenez-Murcia1, 2, Michael Zeiler3, Isabel Sanchez1, 2, Monica Gomez-PeApa1, Lucero Munguia1, Isabel Baenas1, Lorena de Blas-Soto1, Anahi Gaspar-Perez1, Fernando Fernandez-Aranda1, 2. 1Department of Clinical Psychology, University Hospital of Bellvitge-IDIBELL and CIBERobn, Hospitalet de Llobregat, Spain.2Department of Clinical Sciences, School of Medicine and Health Sciences, University of Barcelona, Barcelona, Spain.3Medical University of Vienna, Department for Child and Adolescent Psychiatry, Eating Disorders Unit, Vienna, Austria

217

Clinician perspectives on barriers and enablers to autism-affirming eating disorder care. Emy Nimbley1, 2, Amelia Austin1, Kate Tchanturia3, 4, Kai Thomas5, Catherine R. G. Jones5, Karri Gillespie-Smith1, Fiona Duffy1, 2. 1Department of Clinical Psychology, School of Health in Social Science, University of Edinburh, Edinburgh, United Kingdom.2NHS Lothian Child and Adolescent Mental Health Services, Royal Edinburgh Hospital, Edinburgh, United Kingdom.3Department of Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience, Kinga, London, United Kingdom.4 Department of Psychology, Illia State University, Tbilisi, Georgia.55. School of Psychology, Cardiff University, Cardiff, United Kingdom

218

Understanding ARFID in Neurodiverse and Neurotypical Children: Clinical and Measurement Considerations Natalie Saba1, 2, James Lock2, HaLi Boyce2, Ainsley Cogburn2, Brittany Matheson2. 1Palo Alto University, Palo Alto, CA, USA.2Stanford University School of Medicine, Stanford, CA, USA

219

Comorbid states and characteristics associated with high risk of Avoidant/Restrictive Food Intake Disorder (ARFID) among adults Emilie Southeran1, Glenn Waller1, 2. 1University of Sheffield, Sheffield, United Kingdom.2University of Warwick, Coventry, United Kingdom

DEVELOPMENTAL

220

Beyond the ideal: How body appreciation protects young adolescents from dieting pressures Lien Goossens, Sandra Verbeken, Eva Van Malderen, Elisa Boelens. Ghent University, Gent, Belgium

EPIDEMIOLOGY

221

Capturing Binge Eating in Early Adolescence: Comparing Parent and Child Reports in the CCC2000 Cohort Julia Freyer Martins Pereira, Else Marie Olsen, Nadia Micali. Center for Eating and feeding Disorders Research (CEDaR), Ballerup, Denmark

222

The Association between Child Emotional Abuse and Emotional Neglect with Disordered Eating Behaviours Sonya Gill1, Samantha Salmon1, Melissa Kimber2, Tamara Taillieu1, Tracie.O. Afifi1. 1University of Manitoba, Winnipeg, MB, Canada.2McMaster, Hamilton, ON, Canada

223

The Silent Struggle: High Prevalence of Self-Harm and Suicidal Ideation in Brazilian Patients with Eating Disorders Walter Santos Goncalves, Carlos Eduardo F Moraes, Carla Mourilhe, Maria Fernanda Moreira, Jose Carlos Appolinario. Obesity and Eating Disorders Group, Institute of Psychiatry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil

224

Development and Co-Redesign of a Clinical Quality Registry for Eating Disorders Down Under Deborah Mitchison1, Louise Carpenter1, Kyra Bennett1, Susan Byrne2, 3, Phillipa Hay4, 5, Gabriella Heruc4, 6, Sloane Madden7.8, Sian McLean9, Marion Roberts10, 11, Jack Tame1, Tracey Wade12. 1University of Technology Sydney, Sydney, Australia.2Western Australia Department of Health, Perth, Australia.3Richardson Group, Perth, Australia.4Western Sydney University, Sydney, Australia.5ReCentre, Waratah Private Hospital, Sydney, Australia.6Appetite for Change, Sydney, Australia.7Ramsay Health Care, Sydney, Australia.8University of Sydney, Sydney, Australia.9La Trobe University, Melbourne, Australia.10University of Auckland, Auckland, New Zealand.11Nurture Psychology, Auckland, New Zealand.12Flinders Institute for Mental Health and Wellbeing, Adelaide, Australia

225

Disordered eating patterns in boys " population data from Norway and the UK Nora Trompeter1, Kirsti KvalAcy2, Trine Tetlie Eik-Nes2, Nadia Micali1, 3. 1Great Ormond Street Institute of Child Health, UCL, London, United Kingdom.2Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Trondheim, Norway.3Center for Eating and feeding Disorders Research, Mental Health Center Ballerup, Copenhagen University Hospital a, Copenhagen, Denmark

226

Emergence of Body Dissatisfaction and Disordered Eating from Ages 8 to 12: Longitudinal Evidence from the Growing Up in New Zealand Cohort Tom Woodd, Cameron Grant, Marion Roberts. University of Auckland, Auckland, New Zealand

MEDICAL FACTORS

227

Characterization of Acute Eating Disorder Presentations: A Cross-Sectional Multicenter Analysis of Pediatric Emergency Department Visits Vanessa Burd, Kendrin Sonneville, Suzanne Dooley-Hash, James Cranford. University of Michigan, Ann Arbor, MI, USA

228

Serum Leptin and Thyroid Levels in Hospitalized Patients with Severe Eating Disorders Simar Singh1, Dennis Gibson2, 3, Andrea Garber4, Marina Foster2, Amy B. Stein2, Philip S. Mehler3, 5. 1Department of Psychiatry and Behavioral Sciences University of California, San Francisco San Francisco, CA, USA.2ACUTE Center at Denver Health, Denver, CO, USA.3Department of Medicine University of Colorado School of Medicine, Denver, CO, USA.4Department of Pediatrics University of California, San Francisco, San Francisco, CA, USA.5Eating Recovery Center, Denver, CO, USA

MISCELLANEOUS

229

Enhancing the Uptake of the Canadian Practice Guidelines for Treating Children and Adolescents with Eating Disorders: An Implementation Study Jennifer Couturier1, Maria Nicula1, Ethan Nella1, Tovah Yanover1, Tanya Sharma1, Florence Deng1, Melissa Kimber1, Jennifer Coelho2, Gina Dimitropoulos3, Gail McVey4, Mark Norris5, Nicole Obeid5, Natasha Johnson1, Cheryl Webb1, Melissa Brouwers5. 1McMaster University, Hamilton, ON, Canada.2University of British Columbia, Vancouver, BC, Canada.3University of Calgary, Calgary, AB, Canada.4University of Toronto, Toronto, ON, Canada.5University of Ottawa, Ottawa, ON, Canada

230

Developing and Testing a Fidelity Tool to Evaluate Early Intervention Implementation in Eating Disorder Services Lucy Hyam1, Lucy Gallagher1, Giulia Di Clemente2, EA³in Killackey3, 4, 5, Danielle Glennon2, Jessica Griffiths2, Regan Mills2, Jessica Wilkins1, Muhammad Ahmed2, Zoe Tsivos6, Sarah Macnab7, Ben Kirton8, Emily Palmer9, Karina Allen1, 2, Ulrike Schmidt1, 2. 1 Centre for Research in Eating and Weight Disorders, Department of Psychological Medicine, Institute of Psychiatry, Psychology and Neuroscience, Kinga, London, United Kingdom.2 Eating Disorders Outpatients Service, Maudsley Hospital, South London and Maudsley NHS Foundation Trust, London, United Kingdom.3 Orygen, Melbourne, Australia.4 Centre for Youth Mental Health, The University of Melbourne, Melbourne, Australia.5 Centre for Population Health, Helse-Bergen HF, Haukeland Universitetssjukehus, Bergen, Norway.6The Willows Centre for Health, Greater Manchester Mental Health NHS Foundation Trust, Salford, United Kingdom.7Wiltshire Community Eating Disorders Service, Oxford Health NHS Foundation Trust, Wiltshire, United Kingdom.8Oxfordshire Adult Community Eating Disorders Service, Oxford Health NHS Foundation Trust, Oxford, United Kingdom.9 Sussex Eating Disorder Service, Sussex Partnership NHS Foundation Trust, Worthing, United Kingdom

231

Development of recommendations to improve the identification and management of Binge Eating Disorder and Bulimia Nervosa in primary care in the UK: a qualitative investigation Stella KozmAcr1, 2, Jane R. Smith1, Alex Burns1, 3, Natalia S. Lawrence4, Samantha B. van Beurden1. 1University of Exeter Medical School, University of Exeter, Exeter, UK, Exeter, United Kingdom.2Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, United Kingdom.3Three Spires Medical Practice, Truro, Cornwall, United Kingdom, Truro, United Kingdom.4Department of Psychology, University of Exeter, Exeter, UK, Exeter, United Kingdom

232

Maladaptive Weight-Related Compensatory Behaviors among Individuals Undergoing Metabolic and Bariatric Surgery Deborah Lynn Reas1, Selma A1, Tom Mala2, 3, Ingela Lundin-Kvalem4. 1Regional Department for Eating Disorders, Division of Mental Health and Addiction, Oslo University Hospital, Oslo, Norway.2Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway.3Department of Gastrointestinal Surgery and Paediatric Surgery, Oslo University Hospital, Oslo, Norway.4Department of Psychology, Faculty of Social Sciences, University of Oslo, Oslo, Norway

233

Momentary Instability or Dispositional Dysregulation? Predicting Eating Restriction from EMA-Derived Affect Lability and Trait Emotion Dysregulation Line Wisting1, Ingrid Funderud1, Joseph Wonderlich2, 3, Kristin Stedal1. 1Oslo University Hospital, Regional Dept. for Eating Disorders, Oslo, Norway.2Sanford Research, Division of Biobehavioral Research, Fargo, ND, USA.3University of North Dakota School of Medicine and Health Sciences, Department of Psychiatry, Grand Forks, ND, USA

PSYCHOLOGICAL

234

Does perception of meal portion size normalize long-term in anorexia nervosa? Veronica Attanasio, Lisa Guth, Gabriella F. Milos. University Hospital of Zurich, Department of Consultation-Liaison Psychiatry and Psychosomatic Medicine, Zurich, Switzerland

235

Associations Between Impulsive Phenotypes and Loss of Control Eating During Early Pregnancy Lydia B. Brown1, Riley J. Jouppi1, Rebecca L. Emery Tavernier2, 3, Michele D. Levine1. 1University of Pittsburgh, Pittsburgh, PA, USA.2Weitzman Institute, Moses Weitzman Health System, Washington, DC, USA.3University of Minnesota Medical School, Duluth, MN, USA

236

Parents as Role Models: an Experimental Study on the Influence of Parents’ Self-Related Body Talk on Children’s Body Image. Jolien De Coen, Elisa Boelens, Eva Van Malderen, Ellen Van Moere, Sandra Verbeken, Lien Goossens. Faculty of Psychology and Educational Sciences, Department of Developmental, Personality and Social Psychology, Ghent University, Belgium, Ghent, Belgium , Ghent, Belgium

237

Investigating the Relationship Between Alexithymia and Disordered Eating Maria Garland1, 2, Julian Baudinet3, Rich Bostwick2, Fenella Gill1, 2, Elizabeth Swann1, David Preece2. 1CAMHS Eating Disorder Service, Perth, Australia.2Curtin University, Perth, Australia.3South London and Maudsley Child and Adolescent Eating Disorder Service, London, United Kingdom

238

An Implicit Association Test-Like Task for Assessing Self-Objectification in Healthy Young Women Yumi Hamamoto1, 2, 3, Soichiro Kan4, , Motoaki Sugiura3, 5. 1Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Sendai, Japan.2Research Institute of Electrical Communication, Tohoku University, Sendai, Japan.3Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan.4School of Medicine, Sendai, Japan.5International Research Institute of Disaster Science, Tohoku University, Sendai, Japan

239

Weight Bias Internalization and Disordered Eating Across the Perinatal Period Shruti Kinkel-Ram1, Christine Call1, Caroline Christian1, Shannon Donofry2, Marquis Hawkins3, Riley Jouppi1, 3, Michele Levine1. 1University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.2RAND, Pittsburgh, PA, USA.3University of Pittsburgh, Department of Psychology, Pittsburgh, PA, USA

240

Temperament and Character Profiles in Adolescents with Anorexia Nervosa and Their Parents Dunja Mairhofer, Michael Zeiler, Julia Klang, Stefanie Truttmann, Michalea Mitterer, Gudrun Wagner, Andreas Karwautz. Department of Child and Adolescent Psychiatry, Medical University of Vienna, Vienna, Austria

241

A Sequential Pathway from Weight Stigma to Eating Disorder Symptoms via Low Interoceptive Trust and Central Sensitization Janell L. Mensinger, Maria F. Carriel Sarmiento. Nova Southeastern University, Fort Lauderdale, FL, USA

242

The Ozempic era: weight, food and community storytelling on Reddit Holly Pedersen1, 2, Courtney P. McLean3, Sharon L. Grant1, Kathleen de Boer1, 2. 1Department of Psychological Sciences, Melbourne, Australia.2Centre for Mental Health and Brain Sciences, Melbourne, Australia.3Monash University, Melbourne, Australia

243

Critically Revisiting the Psychometric Properties of the Eating Disorder Examination Questionnaire and Its Short Forms: Is It Time to Move On? Rafael M. A. da Rocha1, 2, 3, Andrea Phillipou2, 3, 4, 5, Erica Neill2, 3, 4, Stephanie Miles2, 3, 5. 1University SApo Francisco, Campinas, Brazil.2Orygen, Parkville, Melbourne, Australia.3Centre for Youth Mental Health, The University of Melbourne, Melbourne, Australia.4Parkville Youth Mental Health a Wellbeing Service, Melbourne, Australia.5Department of Psychological Sciences, Swinburne University of Technology, Melbourne, Australia

244

Dietary restraint and negative affect as potential proximal predictors of ultra-processed food consumption in adolescent girls with binge spectrum eating disorders Laura Rubino1, Laura D'Adamo1, Stephanie Manasse2. 1Department of Psychological and Brain Sciences, Drexel University, Philadelphia, PA, USA.2Center for Healthcare Delivery Science, Nemours Childrena, Wilmington, DE, USA

245

Within-person links between exercise and momentary emotion regulation strategies in anorexia nervosa: Preliminary results of an ecological momentary assessment Johann P. Summ1, Michael Hollauf2, Alexander Heimbeck2, Sandra Schlegl2, 3, Ulrich Voderholzer2, 3, 4, David R. Kolar1. 1Department of Psychology, University of Regensburg, Regensburg, Germany.2Schoen Clinic Roseneck, Prien am Chiemsee, Germany.3Department of Psychiatry and Psychotherapy, LMU University Medicine, Munich, Germany.4Department of Psychiatry and Psychotherapy, Albert-Ludwigs-University Freiburg, Freiburg, Germany

246

Alexithymia and emotion regulation in parents of patients with anorexia nervosa: Results from a longitudinal intervention study Stefanie Truttmann1, Jessica Jerabek3, Julia Klang1, Helene Krauss1, Konstantin Kopp1, Veronica Seitl2, Gudrun Wagner1, Andreas Karwautz1, Michael Zeiler1. 1Department for Child and Adolescent Psychiatry, Eating Disorders Unit, Medical University of Vienna, Vienna, Austria.2Medical University of Vienna, Vienna, Austria.3Department for Child and Adolescent Psychiatry, Eating Disorders Unit, Vienna, Austria

247

Self-Esteem and Positive and Negative Affect Moderate the Association Between Positive Rumination and Eating Disorder Symptoms Valerie Wong1, Ann Haynos2, Edward Selby1. 1Rutgers, The State University of New Jersey, New Brunswick, NJ, USA.2Virginia Commonwealth University, Richmond, VA, USA

TRAUMA

248

Prevalence and Characteristics of Sexual Traumatic Events in Patients With Eating Disorders Gry Kjaersdam TellAcus1, 2, Kristine Kahr Nilsson2. 1Unit for Psychiatric Research, Aalborg University Hospital, Aalborg, Denmark.2Institute of Communication and Psychology, Psychology, Aalborg University, Aalborg, Denmark

TREATMENT/PREVENTION

249

The Maudsley Model Anorexia nervosa treatment for adolescents and young adults (MANTRa): Applicability in the view of patients Carina Aichinger1, Michael Zeiler1, Petra Sackl-Pammer1, Susanne Ohmann1, Sonja Werneck-Rohrer1, Stefanie Truttmann1, Julia Klang1, Konstantin Kopp1, Helene Krauss1, Ulrike Schmidt2, Andreas Karwautz1, Gudrun Wagner1. 1Medical University of Vienna, Vienna, Austria.2King's College London, London, United Kingdom

250

A randomised controlled trial (RCT) of Juniver versus wait-list control: Support for a digital intervention based on neuroscience and cognitive-behavioural therapy Karina L Allen1, Lu Qi1, Emilie Faure2. 1King's College London, London, United Kingdom.2King's College London, London, United Kingdom.3Juniver, London, United Kingdom

251

Parents’ and Guardians’ Experiences of Follow-Up of Maladaptive Movement during Pediatric Treatment of Eating Disorders: a Cross-Sectional Survey from Norway. Solfrid Bratland-Sanda1, Anne Kari Heggestad2, Kristin Sarmon3, Hedda A Lia1, Linda Madsen1, Ingeborg NordbAc1. 1University of South-Eastern Norway, Bo Telemark, Norway.2University of Oslo, Oslo, Norway.3Horten municipality, Horten, Norway

252

Designing a Virtual Reality Café to Support People with Eating Disorders Laura Chapman1, Lydia Shackshaft1, 2, Angela Attwood3, 4, Lucy Biddle1, 4, Gillian Combe5, James Downs6, Tamsin Ford7, Trinisha Govender8, Alys Grant9, Annabelle Hook1, 5, Paul Moran1, 2, Ian Penton-Voak3, 4, Emily Rothwell10, Anne Stewart11, Lucy Yardley3, 12, Helen Bould1, 4, 8. 1Bristol Medical School, University of Bristol, Bristol, United Kingdom.2University Hospitals Bristol and Weston NHS Foundation Trust, Bristol, United Kingdom.3School of Psychological Science, University of Bristol, Bristol, United Kingdom.4NIHR Biomedical Research Centre, University Hospitals Bristol and Weston NHS Foundation Trust and University of Bristol, Bristol, United Kingdom.5Oxford Health NHS Foundation Trust, Oxford, United Kingdom.6Expert by Experience, Cardiff, Wales, United Kingdom.7Department of Psychiatry, University of Cambridge, Cambridge, United Kingdom.8Gloucestershire Health and Care NHS Foundation Trust, Gloucestershire, United Kingdom.9Expert by Experience, Canterbury, United Kingdom.10Greater Manchester Mental Health Foundation Trust, Manchester, United Kingdom.11Department of Psychiatry, University of Oxford, Oxford, United Kingdom.12School of Psychology, University of Southampton, Southampton, United Kingdom

253

Dissonance-Based Eating Disorder Prevention for Young Women in Portugal: Examining the Body Project’s Efficacy, Delivery Modality, and Preference Match Carol Coelho, Rita Ramos, TAcnia Rodrigues, SA³nia GonAsalves, Paulo PP Machado. Psychology Research Centre (CIPsi), School of Psychology, University of Minho, Braga, Portugal

255

Digital Cognitive Behavioral Therapy for Children with Avoidant/Restrictive Food Intake Disorder and Their Caregivers: Preliminary Findings of a Pilot Feasibility Trial Julia E. Engelkamp1, Lara-Marie Koeder1, Jennifer J. Thomas2, 3, Kamryn T. Eddy2, 3, 4, Andrea S. Hartmann1. 1Department of Psychology, Clinical Psychology and Psychotherapy of Childhood and Adolescence, Konstanz University, Konstanz, Germany.2Eating Disorders Clinical and Research Program, Massachusetts General Hospital, Boston, MA, USA.3Department of Psychiatry, Harvard Medical School, Boston, MA, USA.4Division of Child and Adolescent Psychiatry, AMC Department of Psychiatry, Massachusetts General Brigham, Boston, MA, USA

256

Body U Teens: Implementation of an Eating Disorders Screening and Early Intervention Program in Missouri Schools Marie-Laure Firebaugh1, Ellen E. Fitzsimmons-Craft1, Carli P. Howe1, Laura D'Adamo2, Annie Seal3, Marge Cole3, Patricia A. Cavazos-Rehg1, Denise E. Wilfley1. 1Washington University in St. Louis, St. Louis, MO, USA.2Drexel University, Philadelphia, PA, USA.3Missouri Eating Disorders Council, Jefferson City, MO, USA

257

Interventions for Eating Disorders and Disordered Eating in Autism Spectrum Disorder: A Scoping Review Alice Garrood1, Alison Bethel1, Tamsin Newlove-Delgado1, Sophie Blummers2, Vashti Berry1. 1University of Exeter Medical School, Exeter, United Kingdom.2Torbay and South Devon National Health Service Foundation Trust, Torbay, United Kingdom

258

Specialized post-inpatient psychotherapy for sustained recovery in anorexia nervosa via videoconference –an update on the SUSTAIN trial Katrin Giel1, 2, Florian Junne3, Peter Martus4, Martin Diers5, Tobias Hofmann6, Bernd LApwe7, Georgios Paslakis5, Martin Teufel8, Ulrich Voderholzer9, JAprn von Wietersheim10, Beate Wild11, Almut Zeeck12, Wolfgang Bethge13, Ulrike Schmidt14, Stephan Zipfel1, 2, Kathrin Schag1, 2. 1Medical University Hospital, TA¼bingen, Germany.2Center of Excellence in Eating Disorders, TA¼bingen, Germany.3University Hospital, Magdeburg, Germany.4Medical Faculty, TA¼bingen, Germany.5LWL-University Hospital, Bochum, Germany.6CharitAc - UniversitActsmedizin, Berlin, Germany.7University Hospital, Hamburg, Germany.8LVR University-Hospital, Essen, Germany.9Schoen Clinic Roseneck, Prien, Germany.10University Medical Center, UIm, Germany.11University Hospital, Heidelberg, Germany.12University Hospital, Freiburg, Germany.13Center for Clinical Trials, TA¼bingen, Germany.14Kinga, London, United Kingdom

259

Food Noise Decreases During Cognitive Behavioral Therapy for Eating Disorders and Predicts Binge-Eating Outcomes Haley Graver1, 2, Shahad Salman2, Adarsh Javvaji2, Adrienne Juarascio3, Stephanie Manasse1. 1Department of Psychological and Brain Sciences, Drexel University, Philadelphia, PA, USA.2Center for Healthcare Delivery Science, Nemours Childrena, Wilmington, DE, USA.3Oregon Research Institute, Eugene, OR, USA

260

Systematic Review of Implementation Strategies in the Treatment of Anorexia Nervosa Hazal Y Gurcan1, Ha Li Boyce2, Brittany Matheson2. 1Dartmouth College, Hanover, NH, USA.2Stanford University School of Medicine, Stanford, CA, USA

261

Targeting Eating Disorder Symptoms in Severe Obesity Through Smartphone-Supported Behavioral Weight Loss Treatment: An Exploratory Randomized Controlled Trial (SmartBWL) Anja Hilbert1, Lisa-Marie Okhof1, Christiane Prettin2, David Petroff2, Adrienne Juarascio3, Claudia Huebner1. 1Department of Psychosomatic Medicine and Psychotherapy, University of Leipzig Medical Center, Leipzig, Germany.2Clinical Trial Center Leipzig, University of Leipzig, Leipzig, Germany.3Oregon Research Institute, Eugene, OR, USA

262

Additional benefits of neurofeedback in the treatment of patients with anorexia nervosa – a novel treatment approach Jana Karry, Anna Winkeler, Daniela Dumat, Sandra Zara, Hartmut Imgart. Competence Center for Eating Disorders, Parkland Clinic, Im Kreuzfeld 6, 34537, Bad Wildungen, Germany, Bad Wildungen, Germany

263

An Updated Systematic Review and Meta-Analysis of a 10-Session Cognitive Behavioural Therapy for Non-Underweight Eating Disorders. Gabe Krason-Smith, Talar Moukhtarian, Glenn Waller, Caroline Meyer. University of Warwick, Coventry, United Kingdom

264

Comparative Efficacy of Pharmacological Interventions for Anorexia Nervosa in Adolescents and Adults: a Systematic Review and Meta-Analysis Kristina T Kumpf1, Emily Behling2, Harriet Isherwood3, Tara Ramsay-Patel4, Kelsey Hagan1, Michael Bloch2, Rebecca Kamody2. 1Virginia Commonwealth University, Richmond, VA, USA.2Yale School of Medicine, New Haven, CT, USA.3Independent Researcher, London, United Kingdom.4University College London, London, United Kingdom

265

Open versus blind weighing and children's portioning autonomy as predictors of weight gain in adolescent anorexia nervosa: Evidence from an outpatient setting Corina Lendfers1, Michael Berndonner 1, 2. 1Kompetenzzentrum FiT Anorexie, Chur, Switzerland.2Martin-Luther-UniversitAct Halle-Wittenberg, Halle, Germany

266

Acceptability and Feasibility of a Single-Session Online Parent-Focused Intervention Targeting Body Image Development in Young Children Anna Love, Sarah Domoff, Julia Hormes. University at Albany, Albany, NY, USA

267

A Holistic Investigation of Early Change and Baseline Predictors of Multiple Treatment Outcomes for People with Anorexia Nervosa (AN) and Atypical AN. Haider Mannan1, Janet Conti1, Joon Bae1, Sinead Day2, Deborah Mitchison2, Phillipa J Hay1. 1Western Sydney University, Campbelltown, Australia.2University of Technology Sydney, Ultimo, Australia

268

Adolescents with atypical anorexia nervosa in family-based treatment (FBT) Brittany Matheson1, Qianheng Ma1, Ainsley Cogburn1, Jennifer Couturier2, James Lock1. 1Stanford University School of Medicine, Stanford, CA, USA.2McMaster University, Hamilton, ON, Canada

269

Template-Guided Multimodal Inpatient Therapy for Anorexia Nervosa. A Naturalistic Study. Yoan Mihov1, 2, Lisa Guth1, Tugce Aras1, Lisa-Katrin Kaufmann1, 3, Stephen A. Wonderlich4, 5, Gabriella Milos1. 1University Hospital Zurich, Department of Consultation-Liaison Psychiatry and Psychosomatic Medicine, Zurich, Switzerland.2Department of Psychology, Clinical Psychology and Psychotherapy, Freiburg, Switzerland.3University of Zurich, Department of Psychology, Zurich, Switzerland.4Sanford Center for Biobehavioral Research, Fargo, ND, USA.5University of North Dakota School of Medicine and Health Sciences, Grand Forks, ND, USA

270

A Feasibility Study of a Digital Self-led Nature Connectedness Intervention for People Experiencing Disordered Eating Mia L Morgan1, 2, Brenda Caldwell Phillips1, Charlotte Scott1, Miles Richardson1. 1University of Derby, Derby, United Kingdom.2University of Bath, Bath, United Kingdom

271

Adolescents’ and Parents’ Experiences of Family-Based Treatment for Anorexia Nervosa in a Scandinavian Context Signe Holm Pedersen1, Mette Bentz1, Stine Bay2, Julie Midtgaard3, 4. 1Child and Adolescent Mental Health Center, Copenhagen University Hospital a, Copenhagen, Denmark.2Danish National Association for Eating Disorders and Self-Harm, Valby, Denmark, Copenhagen, Denmark.3Mental Health Center Glostrup, CARMEN (Centre for Applied Research in Mental Health Care), Copenhagen University Hospital a, Copenhagen, Denmark.4Dept of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark, Copenhagen, Denmark

272

Development and Proof-of-Concept Testing of a Single-Session Personalized Feedback Intervention based on Ecological Momentary Assessment Data for People with Eating Disorders Sarah E. Racine1, Elizabeth Hales1, Laura Lapadat1, Devyn R. Riddle1, Samantha Wilson2, Maureen Plante3. 1McGill University, Montreal, QC, Canada.2University of Saskatchewan, Saskatoon, SK, Canada.3University of Alberta, Edmonton, AB, Canada

273

Key Components of Effective Nutrition Counseling in Eating Disorder Treatment: A Qualitative Study Meg Salvia1, Jaimie Winkler2, 3, Jodi Galin4, Lisa Pearl5, 6. 1Boston University, Boston, MA, USA.2McLean Hospital, Belmont, MA, USA.3Navigate Nutrition, Arlington, MA, USA.4Private practice, Lexington, MA, USA.5CNC 360, Lexington, MA, USA.6Simmons University, Boston, MA, USA

274

Co-designing a Framework to Implement Eating Disorder Care Transition Guidelines for Youth and Young Adults Sela Scott1, Maria Nicula2, Jayden Lee3, Taqwa Hossain1, Cheryl Webb2, Muhammad Farooq2, Tovah Yanover2, Ethan Nella2, Manya Singh3, Jennifer Couturier2, 4, Gina Dimitropoulos1, 3. 1Faculty of Social Work, University of Calgary, Calgary, AB, Canada.2Department of Psychiatry and Behavioural Neurosciences, McMaster University, Hamilton, ON, Canada.3Department of Psychiatry, Mathison Centre for Mental Health Research and Education, University of Calgary, Calgary, AB, Canada.4Offord Centre for Child Studies, McMaster University, Hamilton, ON, Canada

275

Naturalistic Evaluation of the Project Body Neutrality Single-Session Intervention Arielle C. Smith1, Robert R. Morris2, Kallie Oa2, Mallory L. Dobias1, Shivani Dutt3, Jessica Scheer3, Andrea K. Graham1, Jessica L. Schleider1. 1Department of Medical Social Sciences, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.2Koko, San Francisco, CA, USA.3National Eating Disorders Association, White Plains, NY, USA

276

A Randomized Effectiveness Trial of a Dissonance-Based Dual Obesity and Eating Disorder Prevention Program Eric Stice1, Paul Rhode2, Jeff Gau2, Heather Shaw1, Jasmine Lopez1. 1Stanford University, Stanford, CA, USA.2Oregon Research Institute, Springfield, OR, USA

277

Protocol for a Non-inferiority Trial Comparing an Online Guided Intervention for Binge Eating Disorder Associated with Morbid Obesity vs. Treatment as Usual Sanne van Luenen, Tessa Meijers, Petra Poelstra, Mignon van Bruggen, Margo de Jonge. Novarum Centre for Eating Disorders and Obesity, Amstelveen, Netherlands

278

Qualitative Evaluation of a Novel Serious Game Intervention for Parents of Adolescents with Anorexia Nervosa Dorthe Waage1, Mette Bentz2, Signe Holm Pedersen2, Anne Bryde1, Elisa Rafn2, Nadia Micali1, 3. 1Center for Eating and feeding Disorders Research (CEDaR), Copenhagen University Hospital a, Copenhagen, Denmark.2Child and Adolescent Mental Health Center, Copenhagen University Hospital a, Copenhagen, Denmark.3Great Ormond Street Institute of Child Health, University College London, London, United Kingdom

279

Spanish Language Pilot of Multifamily Guided Self-Help Family Based Treatment Groups for Anorexia Nervosa (MF-GSH-FBT) Aileen Whyte, Brittany Matheson, Ainsley Cogburn, Josephine Sanchez, Natalie Saba, James Lock. Stanford University School of Medicine, Palo Alto, CA, USA

280

Trajectories of blood parameters and body weight during inpatient treatment of anorexia nervosa with extreme underweight Eva P. Wuttke1, 2, 3, Adrian Meule3, 4, Ulrich Cuntz2, 5, Ulrich Voderholzer1, 2, 6. 1Department of Psychiatry and Psychotherapy, LMU University Hospital, LMU Munich, Munich, Germany.2Schoen Clinic Roseneck, Prien am Chiemsee, Germany.3Department of Psychology, University of Regensburg, Regensburg, Germany.4Department of Medicine, HMU Health and Medical University, DA¼sseldorf, Germany.5PMU, Paracelsus Medical University Salzburg, Salzburg, Germany.6Department of Psychiatry and Psychotherapy, University Hospital of Freiburg, Freiburg, Germany