From: Why are women predisposed to autoimmune rheumatic diseases?
Disease
Female:male ratio
Peak age at onset
Reference
Rheumatoid arthritis
2:1 to 3:1
Forties
[83]
Systemic lupus erythematosus
9:1
Late teens to early forties
[6]
Systemic sclerosis
3:1
Fortiesa
[4]
