Surgical site infection occurred within 30 days in 0 antisepsis sides versus 3.8 % ( 4 of 104 ) of control sides ( p = 0.13 ) , and within 1 year in three of 104 ( 2.9 % ) of antisepsis sides versus 6 of 104 ( 5.8 % ) of control sides ( p = 0.45 ) .