MSFinals-2545

A 45-year-old male comes to your clinic complaining of knee pain. He reports experiencing severe pain in his left knee for the past 5 days, and he describes the joint as feeling very warm. During the examination, you observe redness and swelling of the affected joint. Aspiration of the knee does not show any signs of septic arthritis, but it does reveal deposits of calcium pyrophosphate dihydrate crystals.
What is a risk factor for this condition?