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OBJECTIVEUsing a nationally representative sample of the civilian noninstitutionalized U . S . population , we estimated prediabetes prevalence and its changes during 1999 - 2010 . RESEARCH DESIGN AND METHODSData were from 19 , 182 nonpregnant individuals aged >= 12 years who participated in the 1999 - 2010 National Health and Nutrition Examination Surveys .
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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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