Functional status predicts postoperative mortality after liver transplantation

Area of Science:

• Transplantation Medicine
• Surgical Outcomes Research
• Patient Risk Stratification

Background:

• Frail patients are at increased risk from the stresses of liver transplantation (LT).
• The Karnofsky Performance Status (KPS) scale is used to assess frailty for risk adjustment in transplant center auditing.
• This study investigates the link between functional impairment and postoperative mortality after LT.

Purpose of the Study:

• To determine if pre-transplant functional status, measured by the KPS scale, predicts mortality after liver transplantation.
• To quantify the increased risk of death associated with different levels of functional impairment in LT recipients.

Main Methods:

• Analysis of 24,505 first-time LT recipients from the Scientific Registry of Transplant Recipients (2006-2011).
• Patients categorized into Severe, Moderate, or Normal function/disability groups based on KPS scores.
• Hierarchical logistic modeling used to assess 30- and 90-day mortality, accounting for center-specific KPS measurement variations.

Main Results:

• Over 25% of patients had Severe functional impairment; 30.5% had no limitations.
• Severely and Moderately impaired patients had 2.56 and 1.40 times the odds of 30-day mortality, respectively.
• Higher mortality in impaired groups was linked to technical complications and multiorgan failure.

Conclusions:

• Pre-transplant functional status, assessed by the KPS scale, is a significant predictor of post-LT mortality.
• The KPS scale provides a reliable measure for identifying LT candidates at higher risk for adverse outcomes.
• Integrating KPS assessment into pre-transplant evaluations can improve patient management and outcomes.