Is Younger Age a Risk Factor for Failure Following Aseptic Revision Total Knee Arthroplasty?

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering
• Geriatric Medicine

Background:

• Revision total knee arthroplasty (rTKA) is increasingly common in younger US populations.
• Limited large-scale studies exist on the impact of age on rTKA outcomes.
• This study investigates the influence of patient age on rTKA success rates.

Purpose of the Study:

• To evaluate the effect of age on revision total knee arthroplasty (rTKA) outcomes.
• To compare rerevision rates between younger and older patient cohorts.
• To identify risk factors associated with rerevision after rTKA.

Main Methods:

• Utilized the American Joint Replacement Registry (2012-2020) for aseptic rTKAs.
• Compared younger (18-64 years) and older (>65 years) patient groups.
• Employed Kaplan-Meier survivorship analysis and multivariate regression for outcomes.

Main Results:

• Younger patients showed a higher rerevision rate (8.1% vs. 5.4%) than older patients.
• 10-year survivorship free of rerevision was lower in younger (90.2%) versus older (93.7%) cohorts.
• Younger age, male sex, and revision for instability were linked to increased rerevision risk.

Conclusions:

• Younger age is a significant risk factor for all-cause rerevision after aseptic rTKA.
• Age appears to have a continuous effect, with a 10% increased risk for every 5-year age reduction.
• Further research is needed to understand and mitigate these risks in younger rTKA patients.