The rates of incisional surgical-site infection were 18.0 % , 6.1 % , and 17.9 % in Groups A , B , and C , and the rates of leakage were 12.0 % , 1.0 % , and 7.4 % in Groups A , B , and C , respectively , indicating that both rates were lesser in Group B than in Groups A and C ( P = .014 and P = .004 , respectively ) .