Final answer:
Osteoarthritis is the most common cause of non-gonococcal arthritis in adults. It is associated with aging and wear and tear on the joints.
Step-by-step explanation:
The most common cause of non-gonococcal arthritis in adults is osteoarthritis. Osteoarthritis is associated with aging and the wear and tear of the articular cartilage.
Risk factors for osteoarthritis include joint injury, physical labor, certain sports activities, and being overweight. As the articular cartilage wears down, more pressure is placed on the bones, causing pain, joint stiffness, and inflammation.