Clinical trial NCT03339791: Sleeve Versus Bypass in Older Patients: a Randomized Controlled Trial
Official title: Sleeve Gastrectomy Versus Roux-en-Y Gastric Bypass for Treatment of Severe Obesity in Patients With 65 Years or Older: a Randomized Controlled Trial - The "BaSE" Trial - Bariatric Surgery in the Elderly.
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Obesity, Morbid
Surgery
Elderly
Lead sponsor: University of Sao Paulo General Hospital
Sponsor class: OTHER
First posted: 2017-11-13
Enrollment: 36
Sex: ALL
Minimum age (years): 65
Maximum age (years): 80
Standard ages: OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Intervention model description: Randomized controlled trial
Primary purpose: TREATMENT

Brief summary: The aim of the study is to compare two different bariatric procedures performed in patients with 65 years or more: gastric bypass and sleeve gastrectomy. Primary outcomes will be weight loss, control of comorbidities and morbidity of the operation. Secondary outcomes are related to functionality, that will be evaluated with specific tests.

Detailed description: Introduction: Surgical treatment of obesity in patients over 65 years of age is controversial. For patients in this age group, there is a prevailing concept that the risk / benefit ratio of the procedure should be evaluated for each individual patient, without determining objective criteria or outcomes that characterize this benefit. Increased surgical risk in patients older than 65 years is undoubtedly a limiting factor for the broader indication of bariatric surgery in this population. The two most applied surgical techniques are Sleeve Gastrectomy and Roux-en-Y Gastric Bypass. Most of the studies that evaluated the two techniques in elderly patients are retrospective, prospective non-randomized, or contemplated only one technique. Recent, studies concluded that in the elderly the weight loss with Gastric Bypass was higher, but the surgical morbidity with the Sleeve was lower and there was no difference in the resolution of comorbidities between the two techniques. In evaluating the benefits of surgery, most studies address outcomes such as weight loss and control of metabolic and cardiovascular comorbidities. Outcomes that are specific to the treatment of obesity in the elderly, such as improvement of functionality, decreased fragility and improvement of the quality of life have not been studied yet. In this field, there is concern that excessive weight loss, accompanied by loss of muscle mass may compromise the mentioned parameters, especially in individuals who already have loss of bone and muscle mass before surgery. For this reason, the assessment of bone mass and body composition in the preoperative period of these individuals is fundamental. In order to identify the benefits of weight loss promoted by surgery and life expectancy, the elderly patients in preparation for operation at the Bariatric Surgery Unit of the Hospital das Clinicas University of São Paulo School of Medicine are submitted to a geriatric evaluation, which includes the analysis of their functional dependency profile, Important prognostic factor in this population. Objectives: The primary objective of the study will be to evaluate surgical morbidity and short-term (weight loss, comorbid control) outcomes of surgical treatment of obesity in patients over 65 years of age, comparing two techniques: Sleeve Gastrectomy (SG) and Gastric Bypass (GB). The secondary objective will be to evaluate the body composition of the individuals, before and after the surgery, comparing the two techniques. Patients and methods: This is a prospective study, in which 40 consecutive patients, aged 65 years and over, will be admitted to the Bariatric and Metabolic Surgery Unit of the Discipline of Digestive System Surgery of Hospital das Clinicas University of São Paulo School of Medicine with indication criteria for bariatric surgery. Patients will be randomized into two groups according to the surgical technique to be used: SG or GB. Data related to surgical morbidity, weight loss, control of comorbidities, nutritional deficiencies, changes in body composition and functionality will be evaluated and compared after a follow-up of at least 12 months.

Eligibility criteria: Inclusion Criteria:

* BMI over 40 Kg/m2 for at least 5 years with failure of obesity medical treatments
* BMI over 35 Kg/m2 with at least 2 comorbidities and failure of medical treatments

Exclusion Criteria:

* prior bariatric surgery
* clinical or psychological conditions that contraindicate bariatric surgery

Primary outcomes:
measure: Total Weight loss
timeFrame: 1 year
measure: Surgical Complications
timeFrame: 30 days
measure: Mortality
timeFrame: 90 days
measure: Improvement of Type II diabetes
timeFrame: baseline and 1 year
measure: Improvement of hypertension
timeFrame: baseline and 1 year
measure: Improvement of LDL
timeFrame: baseline and 1 year
measure: Clinical complications
timeFrame: 30 days
measure: Excess weight loss
timeFrame: 1 year
measure: Improvement of hypertension by use of medication
timeFrame: baseline and 1 year
measure: Improvement of HDL
timeFrame: baseline and 1 year
measure: Improvement of triglycerides
timeFrame: baseline and 1 year
Secondary outcomes:
measure: Functionality
timeFrame: baseline and 1 year
measure: Body composition
timeFrame: baseline and 1 year
measure: Functionality
timeFrame: baseline and 1 year
measure: Functionality
timeFrame: baseline and 1 year
Other outcomes:
Locations:
city: São Paulo
country: Brazil
facility: Hospital das Clinicas da Faculdade de Medicina da USP
Study officials:
affiliation: Hospital das Clinicas - Faculdade de Medicina da USP
name: Denis Pajecki
role: PRINCIPAL_INVESTIGATOR
References:
citation: Maghrabi AH, Wolski K, Abood B, Licata A, Pothier C, Bhatt DL, Nissen S, Brethauer SA, Kirwan JP, Schauer PR, Kashyap SR. Two-year outcomes on bone density and fracture incidence in patients with T2DM randomized to bariatric surgery versus intensive medical therapy. Obesity (Silver Spring). 2015 Dec;23(12):2344-8. doi: 10.1002/oby.21150. Epub 2015 Jul 20.
citation: Abbas M, Cumella L, Zhang Y, Choi J, Vemulapalli P, Melvin WS, Camacho D. Outcomes of Laparoscopic Sleeve Gastrectomy and Roux-en-Y Gastric Bypass in Patients Older than 60. Obes Surg. 2015 Dec;25(12):2251-6. doi: 10.1007/s11695-015-1712-9.
citation: Pajecki D, Santo MA, Kanagi AL, Riccioppo D, de Cleva R, Cecconello I. Functional assessment of older obese patients candidates for bariatric surgery. Arq Gastroenterol. 2014 Jan-Mar;51(1):25-8. doi: 10.1590/s0004-28032014000100006.
citation: Strain GW, Gagner M, Pomp A, Dakin G, Inabnet WB, Saif T. Comparison of fat-free mass in super obesity (BMI >/= 50 kg/m2) and morbid obesity (BMI <50 kg/m2) in response to different weight loss surgeries. Surg Obes Relat Dis. 2012 May-Jun;8(3):255-9. doi: 10.1016/j.soard.2011.09.028. Epub 2011 Oct 20.