Silica Dust Exposure Increases Risk for Rheumatoid Arthritis: A Swedish National Registry Case-Control Study.

Objective: Rheumatoid arthritis (RA) is an inflammatory disease with unknown etiology. This study examines if silica dust exposure increases the risk for seropositive and seronegative RA.

Methods: A nationwide registry case-control study was conducted that included all cases of RA in Sweden between 2005 and 2016.