tokens: Two of the 64 patients in the iodixanol group ( 3 percent ) had an increase in the creatinine concentration of 0 . 5 mg per deciliter or more , as compared with 17 of the 65 patients in the iohexol group ( 26 percent ) ( P = 0 . 002 ; odds ratio for such an increase in the iodixanol group , 0 . 09 [ 95 percent confidence interval , 0 . 02 to 0 . 41 ] ) .