Randomized Multicentric Controlled Clinical Trial of Parallel Groups to Evaluate the Non-therapeutic Inferiority of a Free Diet With a Progressive Diet, in the Treatment of Non-complicated Acute Diverticulitis

The study will be carried out in the General Surgery and Gastroenterology Services of the following centers:

• Hospital General Universitario Reina Sofía
• Hospital General Universitario Morales Meseguer de Murcia.
• Hospital Universitario Santa Lucía de Cartagena.
• Hospital General Universitario de Elche.
• Complejo Hospitalario Torrecárdenas de Almería

All patients with increased temperature and acute abdominal pain, as well as clinical suspicion of AD, will be screened for their potential selection in the study. Basic blood tests (hemogram) and abdominal ultrasound will be performed and these guidelines will be followed: if the results indicate complicated AD, it will be excluded from the study; if uncomplicated DA is suspected, blood CRP will be requested; if CRP is less than 5 mg / dl, it will be included in the study and ambulatory treatment will be indicated; if CRP is greater than 5mg / dl, abdominal CT with intravenous contrast will be requested. Result: uncomplicated DA, it will be included in the study and it will be indicated ambulatory treatment or complicated DA, it will be excluded from the study-; those patients with uncomplicated AD, but with risk factors, hospital admission will be recommended, and they may be offered to participate in the study.

If the patient meets the criteria for admission to the study, the attending physician (surgeon on duty) will inform and invite them to participate and after signing the informed consent, their data will be collected and they will be contacted. the person of the hospital, in charge of guarding the list and randomization codes to assign him the corresponding research group: group 1 (free diet) or group 2 (progressive diet) (Annex III), - this group will be delivered of your printed diet and you will be instructed about it, as well as, to all patients, the annotations of pain control and temperature on ad-hoc sheet. The patient data will be delivered to the investigator / s of the study of each hospital, who will fill in the Data Collection Notebook (DCN) of each patient and program their controls without information of the group to which the patient has been assigned, as In this way, the consultations are carried out with blinding of the evaluator (the investigator who will do the controls will not know to which group the patient has been assigned). They will also be asked a quality of life questionnaire SF-12 (baseline) and they will be asked for a blood test with a complete blood count and CRP for the 3rd day of treatment.

Outpatients will be contacted daily by phone during the first 3 days of treatment by the study investigator and between the 3rd and 4th day will go to outpatient surgery for clinical and analytical control (1st consultation), filling in the DCN. The hospitalized patients will follow the same clinical and analytical control by the plant surgeon and the study investigator, filling in the DCN. They will be asked for new blood tests with CRP for the 7th day of treatment and, in those patients who do not have a colonoscopy in the last 12 months prior to entering the study, an endoscopic study will be requested before 60 days for confirmation of diverticular disease, filling in the DCN. They will be given a new SF-12 quality of life questionnaire that they will fill out on the 7th day of the start of the treatment. They will be cited for a new consultation (2nd consultation) to all patients (outpatients and those who have been hospitalized), 30 days of the beginning of the treatment, with new clinical control and annotation of the last analytical, as well as third and last SF-12 quality of life questionnaire, in the DCN. To conclude, patients who were asked for colonoscopy, will be cited in a final consultation (3rd) 2 months after beginning the treatment with the endoscopic result closing the study, with the last entries in the DCN.