Air pollution ranks high among risk factors for the global burden of disease. The associations of air pollution and rheumatoid arthritis (RA) are controversial. This systematic review and meta-analyses has analyzed the association between outdoor air pollution and the development of RA.
PubMed, Embase and Web of science (last search, May 21, 2019) were searched. A meta-analysis was performed with a random-effects model, and summarized syntheses effects were expressed as relative risks (RRs).
Eight studies were identified from among 1296 articles. The pooled RR for the association between ozone (O
Existing evidence indicated significant associations between some markers (ozone, proximity to traffic road and PM