10566
Results : The mean age of the study participants was 63 . 2 +/- 12 . 7 years , and 36 patients ( 31 . 9 % ) were male .
 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