The reoperation rate was significantly higher in the laparoscopic lavage group ( 15 of 74 patients [ 20.3 % ] ) than in the colon resection group ( 4 of 70 patients [ 5.7 % ] ; difference , 14.6 % [ 95 % CI , 3.5 % to 25.6 % ] ; P = .01 ) for patients who did not have fecal peritonitis .