From the Guidelines
Rheumatoid arthritis risk factors include genetic predisposition, particularly HLA-DR4, as well as environmental factors such as smoking, which is the most well-established risk factor, increasing both disease risk and severity, as supported by various studies 1, 2.
Key Risk Factors
- Genetic predisposition, especially HLA-DR4, plays a significant role in the development of rheumatoid arthritis, with certain genetic markers increasing the likelihood of developing the disease 1.
- Environmental factors, including smoking, are critical in increasing the risk and severity of rheumatoid arthritis, with smoking being the most well-established environmental risk factor 2.
- Other risk factors include:
- Family history of autoimmune diseases
- Obesity
- Periodontal disease
- Certain infections that may trigger the immune system
- Environmental exposures to silica dust and asbestos
- High stress levels and trauma, which may serve as triggers in genetically susceptible individuals
Importance of Identifying Risk Factors
Understanding these risk factors is crucial because early identification of high-risk individuals can lead to earlier diagnosis and treatment, potentially reducing joint damage and disability, as emphasized in the management guidelines for rheumatoid arthritis 2. The presence of autoantibodies, such as rheumatoid factor and/or anticitrullinated peptide antibodies, particularly at high levels, is also a significant predictor of bad outcomes in rheumatoid arthritis, as highlighted in the EULAR recommendations 1.
From the Research
Risk Factors for Rheumatoid Arthritis
- Rheumatoid arthritis (RA) is a common disease that causes substantial morbidity and mortality 3
- Current smoking has been identified as a predictor of inadequate response to methotrexate monotherapy in RA patients naïve to disease modifying anti-rheumatic drugs (DMARDs) 4
- Female gender and higher disease activity score 28 (DAS28) are also associated with inadequate response to methotrexate 4
- Serum cotinine, a biomarker of tobacco exposure, has been studied in relation to treatment response in early RA, but results are mixed 5
Modifiable Risk Factors
- Smoking is a modifiable risk factor that may impact treatment response in RA patients 4, 5
- Quitting smoking may enhance therapeutic response to methotrexate, but further studies are required to investigate this 4
Non-Modifiable Risk Factors
- Female gender is a non-modifiable risk factor associated with inadequate response to methotrexate 4
- Age is also a non-modifiable risk factor, with older patients having a lower response to treatment 4
Disease Management
- Early diagnosis and aggressive treatment with DMARDs have improved the management and long-term prognosis of RA 6
- Combination therapy with methotrexate, sulfasalazine, and hydroxychloroquine is more effective than methotrexate alone or a combination of sulfasalazine and hydroxychloroquine in patients with RA 3