Cancer Risk in Patients with Rheumatoid Arthritis
Author Information
Author(s): Allison L. Smitten, Teresa A. Simon, Marc C. Hochberg, Samy Suissa
Primary Institution: Duke University School of Medicine
Hypothesis
What is the incidence of malignancy in adult patients with rheumatoid arthritis compared to the general population?
Conclusion
Patients with rheumatoid arthritis are at higher risk of lymphoma and lung cancer, but potentially at lower risk for colorectal and breast cancer compared to the general population.
Supporting Evidence
- RA patients have approximately a two-fold increase in lymphoma risk.
- The risk of lung cancer in RA patients has a standardized incidence ratio of 1.63.
- Colorectal cancer risk is decreased in RA patients with a standardized incidence ratio of 0.77.
- Breast cancer risk is also decreased in RA patients with a standardized incidence ratio of 0.84.
Takeaway
People with rheumatoid arthritis might get lymphoma and lung cancer more often than others, but they might get less colorectal and breast cancer.
Methodology
A systematic review and meta-analysis of observational studies comparing malignancy risk in RA patients to the general population.
Potential Biases
Selection bias due to different study designs and data sources.
Limitations
Heterogeneity among studies, potential misclassification, and variability in follow-up times.
Participant Demographics
Adult patients with rheumatoid arthritis from various geographic regions.
Statistical Information
Confidence Interval
95% CI 1.01 to 1.09
Digital Object Identifier (DOI)
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