What do systematic reviews say?

Gastric bypass vs biliopancreatic diversion with duodenal switch (laparoscopic or open)

• Surgery for weight loss in adults 2014 · Cochrane Headline outcomes only
  no estimate extracted
  2 studies · 107 participants
  Very low

Laparoscopic gastric bypass vs laparoscopic adjustable gastric banding

• Surgery for weight loss in adults 2014 · Cochrane Headline outcomes only
  no estimate extracted
  2 studies · 240 participants
  Very low

Laparoscopic gastric bypass vs laparoscopic duodenojejunal bypass with sleeve gastrectomy

The review found no eligible studies for this question.

• Surgery for weight loss in adults 2014 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Laparoscopic gastric bypass vs laparoscopic sleeve gastrectomy

• Surgery for weight loss in adults 2014 · Cochrane Headline outcomes only
  no estimate extracted
  2 studies · 277 participants
  Very low