Early death following primary total knee arthroplasty

Area of Science:

• Orthopedic Surgery
• Patient Safety
• Outcomes Research

Background:

• Total knee arthroplasty (TKA) is a common procedure with known risks, including mortality.
• Traditional studies assess TKA mortality against standardized ratios or matched populations.
• This study compares mortality in TKA patients versus those on the surgical waiting list.

Purpose of the Study:

• To compare the mortality rate in patients undergoing primary total knee arthroplasty (TKA) with that of patients awaiting the same procedure.
• To identify potential differences in short-term mortality between TKA and a control group on the waiting list.

Main Methods:

• Retrospective analysis of patients undergoing primary TKA and those added to the waiting list between 2000-2007.
• Calculation of 30-day and 90-day mortality rates for both groups.
• Retrieval of death certificates for deceased patients within the specified timeframes.

Main Results:

• 30-day mortality was significantly higher in the TKA group (0.371%) compared to the waiting list group (0.0683%).
• 90-day mortality was also significantly higher in the TKA group (0.792%) versus the waiting list group (0.387%).
• No significant differences in age or sex were observed between the TKA and waiting list populations.

Conclusions:

• Primary total knee arthroplasty is associated with a statistically significant increase in 30-day and 90-day mortality.
• Patients awaiting total knee arthroplasty represent a valid comparator group for surgical mortality studies.
• Increasing age is identified as a risk factor for mortality after total knee arthroplasty.