Substantial Clinical Benefit After Total Knee Arthroplasty Has Been Set Too High | Synapse
February 2, 2026
Substantial Clinical Benefit After Total Knee Arthroplasty Has Been Set Too High
Key Points
To assess the percentages of patients achieving minimal clinically important difference and substantial clinical benefit in KOOS-JR scores post knee arthroplasty.
Queried the American Joint Replacement Registry for primary TKA cases from 2018 to 2023.
Analyzed KOOS-JR scores for distribution-based and anchor-based minimal clinically important differences.
Evaluated associations between patient demographics and benchmark achievement using generalized linear models.
86.8% achieved the distribution-based minimal clinically important difference.
76.5% met the anchor-based minimal clinically important difference.
Only 65.7% reached the substantial clinical benefit threshold for KOOS-JR.
Abstract
Background: The U.S. Centers for Medicare p 80% patient satisfaction. Level of Evidence: Prognostic Level II . See Instructions for Authors for a complete description of levels of evidence.