Low Exposure to Secondhand Smoke Is Linked to a Rheumatoid A

When the serum cotinine levels were below -2.756 ng/mL, each 1 ng/mL increase in log-2-transformed serum cotinine levels increased the RA risk by 16.3%.

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Xiaogang , Jiangxi , China , Shanxi , Fujian , , Nutrition Examination , Second Hospital Of Shanxi Medical University , National Health , Xiaogang Qui , Second Hospital , Shanxi Medical University , Nutrition Examination Survey ,