How common is Rheumatoid Arthritis
• Race—worldwide, all races. Native Americans (Algonquian and Pima Indians) have higher prevalence.
• Gender distribution—females > males 2–3:1.
• Age—the average age of onset of RA in women is 40 to 60 years, men are older.
• Occurs in about 1% of adults in the United States. The prevalence increases with age.
