Gastric bypass has better outcomes than gastric b and procedures for long-term weight loss , type 2 diabetes control and remission , hypertension , and hyperlipidemia .
Insufficient evidence exists regarding long-term outcomes for gastric sleeve resections
IMPORTANCE Bariatric surgery is an accepted treatment for obesity .
Despite extensive literature , few studies report long-term follow-up in cohorts with adequate retention rates .
OBJECTIVE To assess the quality of evidence and treatment effectiveness 2 years after bariatric procedures for weight loss , type 2 diabetes , hypertension , and hyperlipidemia in severely obese adults .
How much loss to follow-up is acceptable in long-term randomised trials and prospective studies?
to test early  nutritional interventions  and prospect i ve observational cohorts . RCTs are generally accepted as method ologically the best approach for informing health policy . They can equalise unknown as well as known confounding factors and so can demonstrate causation ; they permit estimation of effect size and so can be used to assess likely
Gastric bypass has better outcomes than gastric b and procedures for long-term weight loss , type 2 diabetes control and remission , hypertension , and hyperlipidemia .
Insufficient evidence exists regarding long-term outcomes for gastric sleeve resections
IMPORTANCE Bariatric surgery is an accepted treatment for obesity .
Despite extensive literature , few studies report long-term follow-up in cohorts with adequate retention rates .
OBJECTIVE To assess the quality of evidence and treatment effectiveness 2 years after bariatric procedures for weight loss , type 2 diabetes , hypertension , and hyperlipidemia in severely obese adults .