20946
Chronic polypharmacy weakly correlated with hospital admission ( 2000 : rho = 0 . 08 , p = 0 . 0032 ; 2005 : rho = 0 . 11 , p < 0 . 0001 ; 2010 : rho = 0 . 18 , p < 0 . 0001 ) , but not with mortality .
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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