however , analysing the data for colon and rectum , the relative risk of colonic cancer after cholecystectomy was significantly increased in males ( rr = 2.75 ; p less than 0.05 ) , whereas that of rectal cancer appeared to be decreased in females ( rr = 0.18 ; p less than 0.02 ) .
C0034896
rectum
C0007113
of rectal cancer