PREDICtors for Quality of Life After Sigmoidectomy for DIVerticular Disease

Inclusion Criteria: * patients, scheduled for elective sigmoidectomy for diverticular disease (Indication: foregoing acute diverticulitis with pericolic or pelvic abscess \>1cm, ongoing complaints after acute uncomplicated diverticulitis, recurrent uncomplicated disease (three or more diverticulitis episodes in combination with the patients wish for surgery), recurrent complicated disease (three or more diverticulitis episodes+complications: stenosis, fistula, chronic pain), urgent wish of patients for surgery after uncomplicated disease. * Age \>18 years * ASA 1-3 * informed consent Exclusion Criteria: * Age \<18 years * ASA 4 * acute diverticulitis with free perforation * acute or forgoing diverticular bleeding * colorectal malignancies (current or foregoing) * immunosuppression (corticoids \> 20 mg prednisolon/d, status post transplant) * advanced malignancy with systemic metastases