27064
Using Model 2 , 41 % of the study point estimates of AUC ratio and 71 % of the 90 % confidence intervals were predicted within 1 . 5 - fold of the observed but these increased to 82 % and 100 % respectively with Model 1 .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
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