28398
On multivariate analysis , age in years ( odds ratio [ OR ] 1 . 03 , 95 % confidence interval [ CI ] 1 . 01 - 1 . 05 ) and receipt of concurrent nephrotoxin ( s ) ( OR 3 . 35 , 95 % CI 1 . 34 - 8 . 36 ) significantly increased the risk of developing renal dysfunction .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None