12921
Surgery reduced the diabetes incidence in both the noneligible ( adjusted hazard ratio 0 . 33 [ 95 % CI 0 . 13 - 0 . 82 ] , P = 0 . 017 ) and eligible ( 0 . 27 [ 0 . 22 - 0 . 33 ] , P < 0 . 001 ) groups .
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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