Younger age is associated with greater pain expression among patients with knee or hip osteoarthritis scheduled for a joint arthroplasty.

Younger adults scheduled for arthroplasty expressed pain using more affective words and words with higher intensity and had less radiographically advanced OA than older adults. However, VAS and KOOS/HOOS pain subscales could not distinguish the difference in pain expression. Thus, the POM may be a valuable tool for assessment of pain.