2010
In a multivariate logistic regression model with forward stepwise method , advanced age ( p = 0 . 001 , OR = 1 . 042 , 95CI 1 . 018 - 1 . 068 ) and heterogeneous echogenicity ( p = 0 . 017 , OR = 1 . 955 , 95CI 1 . 129 - 3 . 385 ) remained associated with an increased risk of inadequate CM obtainment after adjustment for other potential confounders ( nodule size > 3 cm and needle size 20 - G usage ) and variables found to be statistically significant in univariate analysis .
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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:
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