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How does osteoarthritis differ from rheumatoid arthritis?
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Osteoarthritis and rheumatoid arthritis are distinct conditions that differ significantly in their causes, symptoms, and underlying mechanisms.
Key Differences
- Nature of the Disease: Osteoarthritis is a degenerative joint disease characterized by the progressive wear and tear of articular cartilage. In contrast, rheumatoid arthritis is a chronic, systemic autoimmune disease where the immune system attacks the body's own tissues, specifically the synovial membranes.1234
- Inflammation: While osteoarthritis is primarily noninflammatory, rheumatoid arthritis is defined by persistent, excessive joint inflammation.52
- Symptom Patterns: In rheumatoid arthritis, joint pain and stiffness are often worse after inactivity and improve with movement; morning stiffness is a hallmark, typically lasting about two hours. Conversely, osteoarthritis pain is usually exacerbated by extended activity and occurs after prolonged use of the joint.31
- Joint Distribution: Rheumatoid arthritis typically affects joints symmetrically (on both sides of the body) and often involves the more proximal joints of the hands. Osteoarthritis more commonly affects weight-bearing joints like the hips, knees, and spine, and in the hands, it tends to affect the more distal joints.63415