A risk factor is something that increases your likelihood of getting a disease or condition.
It is possible to develop rheumatoid arthritis (RA) with or without the risk factors listed below. However, the more risk factors you have, the greater your likelihood of developing RA. If you have a number of risk factors, ask your doctor what you can do to reduce your risk.
RA can develop at any age, but it usually appears between 30 and 50 years of age. RA is more common in women, and it appears later in life for men.
Other factors that may increase your chance of RA include: Genetics
—Some people with RA have specific genetic variations that are associated with abnormal immune response.
—Current or past smoking may nearly double the risk of RA. Smoking is considered an environmental risk factor and is associated with chronic inflammatory reactions throughout the body. Tobacco use in combination with genetic factors has the most impact on risk.
—Bacterial and viral infections cause an immune response. Inflammation stimulates a process to rid the body of infection. In some people, this inflammation and tissue building doesn't stop. Negative immune responses increase the risk of RA.
—Some evidence has made associations between obesity and an increased risk of RA in women.
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Rheumatoid arthritis. Arthritis Foundation website. Available at:
http://www.arthritis.org/about-arthritis/types/rheumatoid-arthritis. October 30, 2014.
Rheumatoid arthritis. Merck Manual Professional Version website. Available at: http://www.merckmanuals.com/professional/musculoskeletal-and-connective-tissue-disorders/joint-disorders/rheumatoid-arthritis-ra. Updated May 2013. Accessed October 30, 2014.
National Institute of Arthritis and Musculoskeletal and Skin Diseases
website. Available at:
http://www.niams.nih.gov/Health_Info/Rheumatic_Disease/default.asp. Updated August 2014. Accessed October 30, 2014.
Sugiyama D, Nishimura K, Tamaki K, et al. Impact of smoking as a risk factor for developing rheumatoid arthritis: a meta-analysis of observational studies. Ann Rheum Dis. 2010;69(1):70-81.
Wasserman AM. Diagnosis and management of rheumatoid arthritis. Am Fam Physician. 2011;84(11):1245-1252.
Last reviewed June 2016 by Michael Woods, MD
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.
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