How Common Is Rheumatoid Arthritis
How Common Is Rheumatoid Arthritis?
Rheumatoid arthritis affects up to 1% of adults.
It tends to be worse in smokers than in nonsmokers.
The only known risk factor for rheumatoid arthritis is a possible inherited factor in some families (genetic predisposition). A genetic factor may affect how the immune system functions, causing inflammation and eventual destruction of the membranes lining the joints.
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