A study published in JAMA in 2004 examined past results of other studies on bariatric surgery. Bariatric surgery is done to replace the size of the stomach in various ways. It is typically used on...

A study published in JAMA in 2004 examined past results of other studies on bariatric surgery.  Bariatric surgery is done to replace the size of the stomach in various ways.  It is typically used on only obese patients,  and one the traditional form of the surgery,  gastric bypass has a 1% mortality (death) rate caused by surgery.  However,  in the studies reporting on the effects of the surgery on Type ll diabetes,  1417 of 1846 diabetic patients recovered completely from diabetes after surgery.  These patients no longer need medication like insulin (which is injected into the skin) or pills to help manage blood sugar.

In a study released a decade later,  the percentage of patients who recover from diabetes has increased 80%. Using confidence intervals determine whether this is a significant change from the 2004 data. Use n=2000