What are the joints mostly involved in osteoarthritis?

Ostreoarthritis. Osteoarthritis is the non inflammatory degenerative joint disease marked by degeneration of the articular cartilage. Joints that are exposed to trauma (wear and tear) are mostly involved. This is different for each person/job type. The construction worker will likely have different joints involved than the receptionist.
Neck. Neck (cervical spine), lower back (lumbar spine), knees, hips, hands, ankles and feet.