Which of the following is the primary risk factor for the development of osteoarthritis?

Early morning joint stiffness lasting for around 1 hour is a common symptom of osteoarthritis. It is caused by the accumulation of synovial fluid in the affected joint during periods of inactivity.

a. Joint redness and warmth are characteristic of inflammatory joint conditions like rheumatoid arthritis, not osteoarthritis.
c. Symmetrical joint involvement is more typical of systemic autoimmune disorders such as rheumatoid arthritis, not osteoarthritis.
d. Rheumatoid nodules are a specific feature of rheumatoid arthritis, not osteoarthritis.

Obesity is a primary risk factor for the development of osteoarthritis, particularly in weight-bearing joints such as the knees and hips. Excess weight puts increased stress on the joints, leading to cartilage breakdown and the development of osteoarthritis. While age, family history, and a sedentary lifestyle can also contribute to the development of osteoarthritis, obesity is the most significant risk factor.

a. While age over 65 years is a risk factor for osteoarthritis, it is not the primary risk factor. Osteoarthritis can occur at any age, especially if other risk factors are present.
b. Family history of osteoporosis is not a primary risk factor for osteoarthritis. Osteoarthritis and osteoporosis are separate conditions with different risk factors.
c. While a sedentary lifestyle can contribute to the development of osteoarthritis, it is not the primary risk factor. Obesity is a more significant risk factor in this context.