The research was published in the July 14 issue of Archives of Internal Medicine, one of the JAMA/Archives journals.

Mary Beth Hamel, MD, MPH, and colleagues at Beth Israel Deaconess Medical Center, Boston, studied medical decision-making and treatment outcomes in 174 patients age 65 and older (average age 75.2) who had severe osteoarthritis of the hip or knee.

Participants’ arthritis symptoms and functional status were assessed at the beginning of the study, between 2001 and 2004, and again 12 months later. Patients who chose to have joint replacement surgery were assessed 6 weeks, 6 months and 12 months after the procedure.

During 12 months of follow-up, 51 patients (29%) had joint replacement surgery, including 30 knee and 21 hip replacements. None of these patients died, 17% had postoperative complications and 38% had pain lasting more than 4 weeks following surgery. Patients age 75 and older took about the same amount of time to return to regular activities as those age 65 to 74, with most patients requiring assistance with activities such as shopping and household chores for more than a month.

At the 12-month mark, scores on scales measuring osteoarthritis symptoms improved more significantly in patients who had surgery than in patients who did not have surgery. Close to half (45 percent) of patients who did not have surgery reported that surgery was not offered to them as a potential treatment. Participants who did not have surgery tended to be older, have lower incomes and be more worried about surgical complications and a long recovery than those who did have surgery.

“Our findings of excellent outcomes from joint replacement surgery in elderly patients with severe hip or knee osteoarthritis corroborate and extend the findings of previous studies,” the authors conclude. “These data should help inform discussion about joint replacement surgery and allow patients to consider the risks and benefits of surgery as well as the expected postoperative recovery experience.”