An observational study in Obesity, Bariatric Surgery and Binge Eating Disorder, sponsored by Hospices Civils de Lyon. Completed at 14 sites in France. Open to participants aged 18 Years to 99 Years. Per ClinicalTrials.gov, last updated 2025-09-02.
Sponsored by Hospices Civils de Lyon · Observational
The aim of the SEMASEARCH project is therefore to constitute a retrospective cohort, from the available data on patients already included in the ATUc/AP2, and prospective, on new patients who will initiate treatment according to the AP2 PUT, of 15 Specialized Obesity Centers in order to describe the effect of WEGOVY® treatment in this population. Thanks to a high phenotyping, subpopulations of interest will be identified to know the specifics of the effect of the treatment in these subgroups of interest. Secondary analyses will aim to look for clinical or biological biomarkers of success in the weight response to WEGOVY® in the entire prospective cohort, but also in specific subpopulations.
In summary, the analysis of the entire SEMASEARCH cohort and sub-populations of interest will be based on a complete clinical phenotyping of patients (included in retrospective and prospective studies), completed by ad hoc questionnaires and associated with biological markers (prospective) partly collected within the framework of the WEGOVY® AP (glycaemia, hepatic assessment, lipid assessment ) and partly from a biobank to test specific hypotheses (predictive role of leptin sensitivity, insulin sensitivity level, plasma level of endocannabinoids, etc.).
In addition, approaches using artificial intelligence (AI), notably machine learning, will make it possible to determine the variables or combination of variables that are most predictive of the weight response to treatment with WEGOVY® in the largest population. Indeed, individual weight loss in response to weight loss strategies is highly variable, whether purely related to lifestyle changes or pharmacological. Well-known factors associated with the ability to lose weight include adherence to lifestyle change, gender, age and specific medications. However, after controlling for these factors, differences in weight loss appear to persist in response to different interventions including pharmacological ones. Adaptation to energy deficit involves complex feedback mechanisms, and inter-individual differences are likely to arise from a range of poorly defined factors. Thus, a better understanding of the factors involved in inter-individual variability in response to WEGOVY® will help guide more personalised approaches to the management of these patients. AI techniques will be used to determine which combination of clinical or biological variables are most predictive of weight response.
6,297 studies on the registry are indexed under Obesity; 1,693 are open to participants now.
This study's enrollment of 1,100 is above the median of 135 across 1,283 observational studies indexed under Obesity.
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All patients included in the 15 centers in the indication of AP2 : Adults with an initial body mass index ≥ 40 kg/m2 (class III obesity or morbid obesity) in the presence of at least one treated comorbidity (treated hypertension, treated dyslipidemia, treated OSAS, established CVD) and included in the ATUc/AP2 WEGOVY®.
Aged over 18 years
Patient included in the WEGOVY® ATU/AP program in one of the 14 participating CSOs: initial Body Mass Index (BMI) ≥ 40 kg/m² (Class III or morbid obesity) and presence of at least one weight-related comorbidity: treated hypertension, treated dyslipidemia, established cardiovascular disease, treated sleep apnea syndrome; and in the absence of therapeutic alternatives
Patient has been informed and has not objected to participation in the study
Patient affiliated with a French social security scheme
Tagging Criteria to Identify Subpopulations of Interest (for classification purposes only - not a condition for inclusion)
*1 Patients with a history of bariatric surgery:
Defined as failure if:
Initial %EWL \< 50% (even without weight regain) and/or weight regain > 20% of lost weight compared to postoperative nadir
*2 Patients with Binge Eating Disorder (BED):
Defined by the clinician according to DSM-5 criteria for BED:
a. Recurrent episodes of binge eating, characterized by both: Eating, in a discrete period of time, an amount of food that is definitely larger than what most individuals would eat in a similar time under similar circumstances A sense of lack of control over eating during the episode
b. The binge eating episodes are associated with three (or more) of the following: Eating much more rapidly than normal Eating until uncomfortably full Eating large amounts of food when not physically hungry Eating alone due to embarrassment Feeling disgusted with oneself, depressed or guilty afterward
c. Marked distress regarding binge eating
d. The binge eating occurs, on average, at least once a week for 5 months
e. The behavior is not associated with regular inappropriate compensatory behavior (e.g., purging, fasting, excessive exercise) and does not occur exclusively during anorexia nervosa or bulimia nervosa
*3 Patients with rare monogenic or syndromic obesity: According to the French national guidelines (PNDS) for rare obesity causes: HAS website
Includes:
Hypothalamic (lesional) obesity, such as craniopharyngioma Genetic forms of obesity
Most frequently encountered syndromes:
Prader-Willi syndrome Bardet-Biedl syndrome 16p11.2 deletion or SH2B1 variant LEPR, POMC, PCSK1, and MC4R variants
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Age > 60 years
a. BMI ≥ 60 kg/m²
*6 Patients with obesity under psychotropic treatment:
Presence of one or more of the following treatments at baseline:
i. Antidepressants: Agomelatine, Amitriptyline, Citalopram, Clomipramine, Duloxetine, Escitalopram, Fluoxetine, Fluvoxamine, Imipramine, Iproniazid, Mianserin, Milnacipran, Mirtazapine, Moclobemide, Paroxetine, Sertraline, Tianeptine, Venlafaxine, Vortioxetine
ii. Antipsychotics: Amisulpride, Aripiprazole, Chlorpromazine, Clozapine, Cyamemazine, Flupenthixol, Fluphenazine, Haloperidol, Levomepromazine, Loxapine, Olanzapine, Pimozide, Pipamperone, Prochlorperazine, Quetiapine, Risperidone/Paliperidone, Sulpiride, Tiapride, Zuclopenthixol
iii. Mood stabilizers: Lithium carbonate, Carbamazepine, Lamotrigine, Oxcarbazepine, Sodium divalproate, Valpromide
iv. Psychostimulants: Methylphenidate
v. Anxiolytics: Antihistamines, anticonvulsants, or other anxiolytic agents
*7 Non-specific patients: Patients not meeting any of the above subpopulation criteria
- Exclusion Criteria
Pregnant or breastfeeding women
Persons under legal protection or guardianship
- Criteria for Early Study Withdrawal
Early withdrawal from the study will occur in the following cases:
The patient withdraws their non-opposition to participation
The patient discontinues treatment with WEGOVY® prematurely
Data collected at initiation, 6 months and 12 months of WEGOVY® treatment will be retrospectively extracted from the WEGOVY® ATU/AP2 eCRF.
Other: Data collection · Other: Blood sampling · Other: Questionnaires
Data collected at initiation, 6 months and 12 months of WEGOVY® treatment will be retrospectively extracted from the WEGOVY® ATU/AP2 eCRF.
Blood sampling for routine care (max 15mL)
Completion of questionnaires for the entire cohort: To assess hyperphagia and eating behaviour: BES, DEBQ and Hunger Score questionnaire To assess physical activity: short IPAQ To assess sleep behaviour: MCTQ To assess quality of life: EQ5D5L To assess digestive system disorders: GIQLI To assess anxiety and depression: HAD
Weight trends in patients included in the SEMASEARCH cohort at initiation and 12 months of treatment with WEGOVY®.
Weight change between treatment initiation and 12 months after (greater than or equal to 10%)
Time frame: At initiation of treatment and 12 month of treatment
Proportion of responders at Month 12
Defined as an absolute weight loss ≥10% from baseline to 12 months after treatment initiation
Time frame: 12 months
Change in binge eating and eating behavior
Change in binge eating and eating behavior based on Binge Eating Scale (BES) BES (Binge Eating Scale): 16-item self-report questionnaire, total score ranges from 0 to 46. Higher scores indicate more severe binge eating symptoms.
Time frame: baseline, 6 and 12 months
Change in sleep behavior based on Munich ChronoType Questionnaire (MCTQ)
Munich ChronoType Questionnaire (MCTQ) assesses sleep duration and chronotype using 6 questions. Derived variables include average sleep duration and midpoint of sleep. Higher sleep duration values reflect longer average sleep; midpoint values indicate chronotype.
Time frame: baseline, 6 and 12 months
Change in quality of life
EQ-5D-5L measures 5 dimensions (mobility, self-care, usual activities, pain/discomfort, anxiety/depression), each rated on 5 levels. Results include: Index value: ranges from \<0 (worse than death) to 1 (perfect health). Visual Analog Scale (VAS): 0-100, higher scores = better perceived health.
Time frame: baseline, 6 and 12 months
Change in physical activity based on the International Physical Activity Questionnaire - Short Form (IPAQ-SF)
The short version of the IPAQ (International Physical Activity Questionnaire) assesses overall physical activity and sedentary behavior over the past seven days. The questionnaire focuses on vigorous and moderate physical activity, walking, and time spent sitting (sedentary behavior), whether during leisure activities, work, daily life, or transportation. This short form includes 7 questions that can be self-administered or answered, for example, over the phone. The questionnaire categorizes individuals into three levels of activity: low, moderate, or high.
Time frame: baseline, 6 and 12 months
Change in gastrointestinal symptoms based on the reduced Gastrointestinal Quality of Life Index (GIQLI)
Reduced GIQLI has 13 items, each scored from 0 to 4. Total score ranges from 0 to 52. Higher scores indicate better gastrointestinal quality of life.
Time frame: baseline, 6 and 12 months
Change in anxiety and depression based on Hospital Anxiety and Depression Scale (HADS)
HADS has 14 items (7 for anxiety, 7 for depression). Each item is scored 0-3; subscale scores range from 0 to 21. Higher scores indicate more severe symptoms.
Time frame: baseline, 6 and 12 months
Evolution of metabolic comorbidities - Change in fasting glucose level (mg/dL)
Fasting plasma glucose will be collected from clinical records at each time point. Values are expressed in milligrams per deciliter (mg/dL). A decrease in glucose level reflects an improvement in glycemic control.
Time frame: baseline, 6 and 12 months
Number of participants with treatment-related adverse events reported in the eCRF at 6 and 12 months
All adverse events recorded in the electronic Case Report Form (eCRF) will be reported, classified by type, severity, and relationship to treatment.
Time frame: 6 and 12 months
Change in body composition - Change in fat mass percentage measured by Dual-Energy X-ray Absorptiometry (DXA)
Body fat percentage will be measured using DXA (dual-energy X-ray absorptiometry). Values are expressed as a percentage (%) of total body mass. A lower fat mass percentage over time is considered a positive outcome reflecting improved body composition.
Time frame: baseline, 6 and 12 months
Change in muscle strength based on chair stand test
Chair Stand Test: number of stands in 30 seconds.
Time frame: baseline, 6 and 12 months
Difference in lean mass between sarcopenic and non-sarcopenic patients
Lean body mass will be measured using Dual-Energy X-ray Absorptiometry (DXA) and/or Bioelectrical Impedance Analysis (BIA). Values will be expressed in kilograms (kg) and/or as a percentage of total body mass (%). The outcome will compare mean values between participants classified as sarcopenic and those classified as non-sarcopenic at each time point. Higher lean mass indicates better muscle preservation.
Time frame: baseline, 6 and 12 months
Change in body weight in each subpopulation
Body weight change from baseline to 6 and 12 months in subgroups of interest (e.g. BED, extreme obesity, sarcopenia, psychotropics)
Time frame: baseline, 6 and 12 months
Proportion of responders by subpopulation at Month 12
Proportion of patients achieving ≥10% weight loss at 12 months in each subpopulation
Time frame: baseline and 12 months
Change in binge eating disorder symptoms in binge eating disorder subgroup
Change in binge eating disorder symptoms according to medical routine monitoring.
Time frame: baseline and 12 months
Change in prevalence of extreme obesity
Percentage of patients with BMI ≥60 kg/m\^2 at baseline and at 12 months in extreme obesity subgroup
Time frame: baseline and 12 months
Change in psychotropic medication use at 12 months in patients on psychotropic medication
Proportion of patients who reduced, maintained, or increased psychotropic medication use.
Time frame: baseline and 12 months
Evolution of metabolic comorbidities - Change in liver enzymes (ALT and AST - U/L)
Alanine aminotransferase (ALT) and aspartate aminotransferase (AST) levels will be assessed as indicators of liver function. Values will be expressed in units per liter (U/L). Lower levels over time may reflect improved hepatic function or reduced liver inflammation.
Time frame: Baseline, 6 months, and 12 months
Evolution of metabolic comorbidities - Change in lipid profile (total cholesterol, HDL, LDL, triglycerides - mg/dL)
Lipid parameters will be collected from routine blood tests
Time frame: Baseline, 6 months, and 12 months
Change in body composition - Change in lean body mass measured by Bioelectrical Impedance Analysis (BIA)
Lean body mass will be assessed using bioelectrical impedance analysis (BIA). Results are expressed in kilograms (kg). An increase in lean mass over time indicates improved muscular composition and overall body health.
Time frame: Baseline, 6 months, and 12 months
Difference in muscle strength between sarcopenic and non-sarcopenic patients
Muscle strength will be assessed using Chair stand test measuring the number of repetitions in 30 seconds.
Time frame: Baseline, 6 months, and 12 months
Change in eating behavior based on Dutch Eating Behavior Questionnaire (DEBQ)
DEBQ is a 34-item questionnaire assessing emotional eating, external eating, and cognitive restraint. Higher scores indicate more disordered eating patterns.
Time frame: Baseline, 6 months, 12 months
Change in hunger based on Hunger Score
Hunger Score consists of 4 items scored from 0 to 10. Higher score reflects greater hunger.
Time frame: Baseline, 6 months, 12 months
Exploratory: Identification of clinical, behavioral, and biological predictors of response using interpretable machine learning models
Supervised machine learning algorithms will be used to identify predictive patterns for ≥10% weight loss response, based on clinical, behavioral, and biomarker data.
Time frame: Through study completion (up to 12 months after treatment initiation)
Plan to share: Undecided
This study is completed, as verified in Aug 2025. You cannot join it, but the record below documents what was studied.
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Hospices Civils de Lyon