Development of explicit criteria for total knee replacement

Area of Science:

• Orthopedic Surgery
• Rheumatology
• Health Services Research

Background:

• Osteoarthritis (OA) is a leading cause of disability, often necessitating total knee replacement (TKR).
• Ensuring appropriate indications for TKR is crucial for optimizing patient outcomes and resource allocation.
• Existing tools for assessing TKR appropriateness require validation and refinement.

Purpose of the Study:

• To develop and validate an appropriateness of indications tool for total knee replacement (TKR) in patients with osteoarthritis.
• To assess the reliability and accuracy of the developed tool.

Main Methods:

• A modified Delphi panel approach was used to establish criteria for TKR appropriateness.
• Two expert panels rated TKR indications, with results compared using kappa statistics.
• Regression models and a classification tree were employed to analyze variables and assess misclassification probability.

Main Results:

• The developed tool deemed TKR appropriate in 26.8% of scenarios, with 67.1% agreement.
• High inter-rater (kappa=0.75) and test-retest (kappa=0.78) reliability were observed.
• Symptomatology and radiology were key predictors of appropriateness; the classification tree achieved a low misclassification rate of 3.8%.

Conclusions:

• The developed appropriateness of indications tool demonstrated acceptable performance and reliability.
• This algorithm can serve as a valuable aid in formulating clinical practice guidelines for TKR.
• Promoting the appropriate use of TKR can lead to improved patient care and resource management.