Low lifelong exposure to cigarette smoking associated with RA risk
Lifelong cigarette smoking was associated with the risk for developing rheumatoid arthritis, with an increased risk even at a low level of exposure and a plateau at 20 pack-years, according to recent study results.
Daniela Di Giuseppe, PhD student, division of nutritional epidemiology, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, and colleagues conducted a search of Medline and Embase for relevant studies published from 1966 to October 2013. A dose-response, random-effects, meta-regression analysis was conducted on studies reporting relative risks or odds ratio estimates for the association between pack-years of cigarette smoking andrheumatoid arthritis (RA).
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