Impact of smoking as a risk factor for developing rheumatoid arthritis: a meta-analysis of observational studies

@article{Sugiyama2010ImpactOS,
  title={Impact of smoking as a risk factor for developing rheumatoid arthritis: a meta-analysis of observational studies},
  author={Daisuke Sugiyama and Keisuke Nishimura and Kenichiro Tamaki and Goh Tsuji and Takashi Nakazawa and Akio Morinobu and Syunichi Kumagai},
  journal={Annals of the Rheumatic Diseases},
  year={2010},
  volume={69},
  pages={70 - 81}
}
Objectives: To assess whether smoking is a risk factor for developing rheumatoid arthritis (RA). Design: Meta-analysis. Method: Data sources were observational studies that examined the association between smoking history and the risk of developing RA identified through Medline and EMBASE (from 1966 to December 2006), relevant books and a reference search. Two authors independently extracted the following: authors’ names, publication year, sample size, participant characteristics, odds ratios… 
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TLDR
An association between smoking and the risk of developing rheumatoid arthritis is confirmed and the effect seems to prevail in the long-term and even in ex-smokers for 2 or more years after smoking cessation.
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TLDR
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TLDR
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TLDR
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