Osteoarthritis of the hip

A 70-year-old man reports a gradual onset of hip pain that has limited his activities for about a year. The pain initially occurred only with walking and was limited to the anterior hip area but now has spread to the side of the hip and is present at rest. He has no history of injury to the hip, back, or lower back and has no pain or morning stiffness in any other joints. He has been taking ibuprofen at a dose of 200 mg once or twice daily, without improvement. How should the patient be evaluated and treated?