13732
The level of OPN mRNA was higher in adipose tissue of obese individuals ( 0 . 13 +/- } 0 . 04 vs 0 . 04 +/- } 0 . 01 , P < 0 . 05 ) and correlated inversely with measures of insulin sensitivity ( r = - 0 . 24 , P = 0 . 001 ) .
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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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