In a study she presented at the 2013 European Congress of Rheumatology, she compared 2-year outcomes post arthroplasty in RA and OA patients in the contemporary era of high use of biologic agents and traditional DMARDs for RA. The 178 RA patients who had total knee replacement had significantly greater comorbidities preoperatively than the 5,206 OA patients. Yet by 2 years postoperatively, they had fully caught up in terms of improved Western Ontario and McMaster Osteoarthritis Index (WOMAC) function and pain scores.
Total hip replacement was a very different story. The 202 RA patients were four times more likely to have poor WOMAC functional outcome and three times more likely to have poor pain outcome scores at 2 years, compared with 5,810 OA patients. In a multivariate analysis, higher expectations for surgery, better preoperative mental health, and more advanced education were associated with better 2-year outcomes.
"I’m not sure why our hip replacement patients with RA aren’t doing as well as the knee replacement patients, but they’re clearly not," according to the rheumatologist.
She reported having no financial disclosures.