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What, in fact, is a successful total knee arthroplasty?

What, in fact, is a successful total knee arthroplasty? Poll 100 surgeons and you might get 150 opinions. But a new study from Australia, using HOOS-12 and KOOS-12 scores for more than 3,400 patients, found THE scores that surgeons can use to define clinically relevant changes in joint-specific pain, function, or quality of life.

Details and results are available in the full study, “Minimal Clinically Important Changes in HOOS-12 and KOOS-12 Scores Following Joint Replacement,” which appears in the June 1, 2022 edition of The Journal of Bone and Joint Surgery.

The research team began by collecting 12-item Hip disability and Osteoarthritis Outcome Scores (HOOS-12) and Knee injury and Osteoarthritis Outcome (KOOS-12) scores for 3,421 patients receiving joint replacement surgery for osteoarthritis (OA)—1,490 total hips and 1,931 total knees.

Ilana Ackerman, Ph.D., co-deputy director of the Monash-Cabrini Department of Musculoskeletal Health and Clinical Epidemiology at the School of Public Health and Preventive Medicine at Monash University in Melbourne, Australia, described to OTW the basic objective and methodology of the study: “The 12-item HOOS-12 and KOOS-12 instruments are relatively new measures of joint-specific pain, function, and quality of life that can be used to assess outcomes after joint replacement surgery from the patient’s perspective. They were developed from the longer HOOS and KOOS instruments.”

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