Study on the Mechanism of Eating Disorder

Study Overview
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Brief Summary
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Eating disorders (EDs) are severe chronic psychiatric disorders with a not fully understood etiopathogenesis. Previous studies have revealed some biological mechanisms of EDs. However, the etiology and maintenance mechanism of EDs, especially the neuro-mechanisms is still unknown. To explore the pathogenic mechanism and treatment biomarkers of EDs, we design this study. the multidimensional data including the clinicopathological features, neuroimaging data (functional and structural magnetic resonance imaging), electroencephalogram and inflammatory cytokines will be used to investigate the biomarkers for diagnosis and treatment effectiveness.

Official Title
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Study on the Mechanism of Eating Disorder

Conditions
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Anorexia Nervosa, Bulimia Nervosa

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Anorexia nervosa Anorexia nervosa according to Diagnostic and Statistical Manual of Mental Disorders (5th edition) (DSM-5); Age: 13-35 (including 13 and 35) BMI: 13-17.5kg/m^2 The participants and/or their legal guardians ( for participants who are younger than 18-year-old) sign the informed consent form voluntarily and agree to participate in all visits and examinations as required by the trial protocol. Do not take any psychiatric medications in past one month. Bulimia nervosa Bulimia nervosa according to Diagnostic and Statistical Manual of Mental Disorders (5th edition) (DSM-5); Age: 13-35 years old (including 13 and 35) The participants and/or their legal guardians ( for participants who are younger than 18-year-old) sign the informed consent form voluntarily and agree to participate in all visits and examinations as required by the trial protocol. Do not take any psychiatric medications in past one month. Exclusion Criteria: Patients who meet DSM-5 diagnostic criteria for other mental disorders: Major depressive disorder, anxiety, obsessive-compulsive disorder, personality disorder, mental retardation; drug and/or alcohol dependence; Patients who receive repetitive Transcranial Magnetic Stimulation (rTMS) or modified electroconvulsive therapy (MECT) treatment in past six months. Patients with severe suicidal tendencies or suicidal behavior Pregnant or lactating women; Patients with MRI contraindications; Patients who are regarded as unsuitable by investigators for this clinical trial.

Ages Eligible for Study
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Minimum Age: 13 Years
Maximum Age: 35 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Anorexia nervosa<br>Patients with anorexia nervosa. | |
| Bulimia nervosa<br>Patients with bulimia nervosa. | |
| Healthy control<br>The healthy control group | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| The change of severity of illness at 8 weeks | The change of scores of Eating disorder Inventory (EDI) will be used to estimate the change of severity of illness. The scores of 8-week will be compared with those of baseline. The maximum of EDI is 396 and the minimum score is 0. | Day 0 to Day 56 | 
| The change of eating disorder behaviors and cognition | The change of scores of Eating Disorder Examination Questionnaire (EDEQ) will be used to estimate the change of behaviors and cognition during treatment.The maximum score of EDEQ is 32.5 and the minium score is 0. | Day 0 to Day 56 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| The change of severity of illness at early or later timepoints during treatment | The change of scores of Eating disorder Inventory (EDI) will be used to estimate the change of severity of illness. The maximum of EDI is 396 and the minimum score is 0 | Day 0 to Day 28; Day 0 to Month 3; Day 0 to Month 6; Day 0 to Month 12 | 
| The change of eating disorder behaviors and cognition | The change of scores of Eating Disorder Examination Questionnaire (EDEQ) will be used to estimate the change of behaviors and cognition during treatment.The maximum score of EDEQ is 32.5 and the minium score is 0. | Day 0 to Day 28; Day 0 to Month 3; Day 0 to Month 6; Day 0 to Month 12 | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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EEG, Eating disorder, anorexia nervosa, bulimia nervosa, functional magnetic resonance imaging