***TASK***
the task is to simplify the input abstract of a biomedical literature

***INPUT***
the input is the abstract of a biomedical literature

***OUTPUT***
the output is the simplified abstract for the input abstract of a biomedical literature

***DOCUMENTATION***

***EXAMPLES***

Input: We included only one non-randomised study published 30 years ago in the review. This study included 77 participants who had gastric ulcer and in whom medical therapy (histamine H2 receptor blockers, antacids, and diet) had failed after an average duration of treatment of 29 months. The authors do not state whether these were recurrent or refractory ulcers. It appears that the participants did not have previous complications such as bleeding or perforation. Of the 77 included participants, 37 participants continued to have medical therapy while 40 participants received surgical therapy (antrectomy with or without vagotomy; subtotal gastrectomy with or without vagotomy; vagotomy; pyloroplasty and suture of the ulcer; suture or closure of ulcer without vagotomy or excision of the ulcer; proximal gastric or parietal cell vagotomy alone; suture or closure of the ulcer with proximal gastric or parietal cell vagotomy). Whether to use medical or surgical treatment was determined by participant's or treating physician's preference. The study authors reported that two participants in the medical treatment group (2 out of 37; 5.4%) had gastric cancer, which was identified by repeated biopsy. They did not report the proportion of participants who had gastric cancer in the surgical treatment group. They also did not report the implications of the delayed diagnosis of gastric cancer in the medical treatment group. They did not report any other outcomes of interest for this review (that is health-related quality of life (using any validated scale), adverse events and serious adverse events, peptic ulcer bleeding, peptic ulcer perforation, abdominal pain, and long-term mortality). We found no studies that provide the relative benefits and harms of medical versus surgical treatment for recurrent or refractory peptic ulcers. Studies that evaluate the natural history of recurrent and refractory peptic ulcers are urgently required to determine whether randomised controlled trials comparing medical versus surgical management in patients with recurrent or refractory peptic ulcers or both are necessary. Such studies will also provide information for the design of such randomised controlled trials. A minimum follow-up of two to three years will allow the calculation of the incidence of complications and gastric cancer (in gastric ulcers only) in recurrent and refractory peptic ulcers. In addition to complications related to treatment and disease, health-related quality of life and loss of productivity should also be measured.
Output:

We found no randomised controlled trials, and identified only one non-randomised study published 30 years ago, on this topic. This study included 77 participants who had stomach ulcer and in whom medical therapy had failed after an average treatment duration of 29 months. Medical therapy included histamine H2 receptor blockers (medicines that block the action of the chemical histamine, resulting in a decreased production of stomach acid, such as ranitidine), antacids, and diet. It must be highlighted that this form of medical treatment is not considered to be as effective as treatment with proton pump inhibitors. The authors do not state whether these were recurrent or refractory ulcers. Of the 77 included participants, 37 participants continued to have medical therapy, while 40 participants received surgical therapy. Whether to use medical or surgical treatment was determined by participant's or treating physician's preference. The evidence is current to September 2015. The study authors reported that two participants in the medical treatment group (5%) had stomach cancer, which was identified after repeated examinations using a camera to look inside the body (an endoscope), in this case, the stomach and small intestine. They did not report the percentage of participants who had stomach cancer in the surgical treatment group. They also did not report the implications of the delayed diagnosis of stomach cancer in the medical treatment group. They did not report any other outcomes of interest (measures by which one treatment can be considered better than another) for this review (that is health-related quality of life, treatment-related complications, peptic ulcer-related complications, abdominal pain, and long-term deaths). There is thus no study that provides the relative benefits and harms of medical versus surgical treatment for recurrent or refractory peptic ulcers. Studies on this topic are urgently required. Since the only study that compared medical and surgical treatment in people with refractory or recurrent ulcers did not report any of the outcomes in a sufficiently detailed manner, we were not able to assess the quality of evidence in a formal way.