Recommendation 6.10 Patients with overt perforation and peritonitis in acute complicated diverticulitis should be operated on within 6 h after diagnosis (emergency surgery).	Evidence level 3, recommendation grade B, consensus
Recommendation 6.11 Symptomatic uncomplicated diverticular disease (CDD 3a) should not be treated surgically.	Evidence level 4, recommendation grade B, strong consensus
Recommendation 6.12 The risk of recurrence in chronic recurrent diverticulitis CDD 3b increases with each flare. The risk of perforation is highest during the first episode and decreases with each subsequent relapse. Therefore, the indication for surgery should not be determined by the number of previous flares.	Evidence level 2, recommendation grade B, strong consensus
Recommendation 6.13 Elective sigmoid resection can significantly improve quality of life in patients with chronic recurrent diverticulitis CDD 3b. Impairment of quality of life due to recurrent disease should be an important determinant in decision‐making when considering elective surgery in these patients.	Evidence level 2, recommendation grade B, strong consensus
Statement 6.14 The risk factors for a complicated postoperative course in patients with chronic recurrent sigmoid diverticulitis CDD 3b correspond to the general risk factors for elective colon resection.	Evidence level 1, strong consensus
Statement 6.15 Chronic recurrent diverticulitis CDD 3c with evidence of fistulas should be treated surgically.	Evidence level 3, recommendation grade B, strong consensus
Recommendation 6.16 Chronic recurrent diverticulitis CDD 3c with evidence of symptomatic colonic stenosis should be treated surgically.	Evidence level 3, recommendation grade B, strong consensus