An interventional study of Laparoscopic gastric bypass and Standard conservative treatment in Obesity, Morbid, sponsored by Sykehuset i Vestfold HF. Active, not recruiting at 1 site in Norway. Open to participants aged 13 Years to 18 Years. Per ClinicalTrials.gov, last updated 2026-04-24.
Sponsored by Sykehuset i Vestfold HF · Not applicable, Interventional, and Treatment
The purpose of this study on adolescents between 13 and 18 years of age with morbid obesity is to determine whether surgical treatment gives more health benefits than standard conservative treatment, and if laparoscopic gastric bypass is a method with high safety and a low complication rate.
The study has two intervention arms:
Experimental: Group A Surgery; laparoscopic gastric bypass
Active comparator: Group B Patients from Child Obesity Registry of Vestfold who get standard conservative treatment in a multidisiplinary team at Morbid Obesity Center.
All patients are referred to Morbid Obesity Center from other hospitals or general practionairs in Norway. The procedure will take place at the Vestfold Hospital Trust The participants are included for 2 years follow-up with visits to a multidisciplinary team every 3rd month at the Morbid Obesity Center. Total follow-up time is ten years.
941 studies on the registry are indexed under Obesity, Morbid; 163 are open to participants now.
This study's planned enrollment of 120 is above the median of 62 across 602 interventional studies indexed under Obesity, Morbid.
Browse Obesity, Morbid studies →Sykehuset i Vestfold HF is the lead sponsor of 23 studies on the registry; 5 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.
What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.
BMI (body mass index)
Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.
What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Laparoscopic Gastric Bypass
Procedure: Laparoscopic gastric bypass
Standard conservative treatment. Patients from Child Obesity Registry of Vestfold.
Behavioral: Standard conservative treatment
Patients are referred to Morbid Obesity Center from Vestfold Hospital Trust and other hospitals in Norway. The procedure will take place at Morbid Obesity Center, Vestfold Hospital Trust.
Participants from Child Obesity Registry who undergoes conservative treatment at Morbid Obesity Center, Vestfold Hospital Trust.
BMI and weight loss
Surgical or standard conservative treatment
Time frame: Baseline, Year 1, 2, 5, 10
Quality of Life (KINDL)
Web-based questionnaire baseline and after 1, 2, 5 and 10 years.
Time frame: 10 years
Eating Disorders (Child Eating Behavior Questionnaire)
Web-based questionnaire baseline and after 1, 2, 5 and 10 years.
Time frame: 10 years
Mental Health (Development and Well-Being Assessment, DAWBA)
Web-based questionnaire baseline and after 1, 2, 5 and 10 years.
Time frame: 10 years
Self-Esteem (Rosenberg Self-Esteem scale)
Web-based questionnaire baseline and after 1, 2, 5 and 10 years.
Time frame: 10 years
Surgical and Medical Complications
Web-based questionnaire baseline and after 1, 2, 5 and 10 years.
Time frame: 10 years
Blood sample results
Blood tests are biobanked at baseline and after 1, 2, 5 and 10 years.
Time frame: 10 years
Started Jun 2009 (actual). Primary completion is estimated for Aug 2033, 290 months after the start.
Of 274 non-industry interventional studies with no phase under Obesity, Morbid, half reached primary completion within 25 months of starting (the median), counting those still running; a quarter within 11 and three quarters within 48. This study's planned 290 months is above that.
Counting every sponsor, half of 286 studies reached it within 25 months; a quarter within 11 and three quarters within 48.
How these figures are worked out, and which studies are left out of them.
This study is active, not recruiting, as verified in Mar 2026. You cannot join it, but the record below documents what was studied.
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Sykehuset i Vestfold HF