812
The mean change in the creatinine concentration from day 0 to day 7 was 0 . 07 mg per deciliter in the iodixanol group and 0 . 24 mg per deciliter in the iohexol group ( P = 0 . 003 ; value in the iodixanol group minus the value in the iohexol group , - 0 . 17 mg per deciliter [ 95 percent confidence interval , - 0 . 34 to - 0 . 07 ] ) .
 Chemical: creatinine; Chemical: iodixanol; Chemical: iohexol; Chemical: iodixanol; Chemical: iohexol
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: creatinine; Chemical: iodixanol; Chemical: iohexol; Chemical: iodixanol; Chemical: iohexol