Functional status of patients before liver transplantation as a predictor of posttransplant mortality.
BACKGROUND
Risk models for mortality after liver transplantation have poor predictive ability. We examined whether the performance of these risk models can be improved by including information about patients' functional status (i.e., their ability to carry out activities of daily living) in addition to conventional clinical risk factors.


METHODS
The UK and Ireland Liver Transplant Audit has data on all liver transplantations carried out in both countries since 1994. We examined the association of functional status measures taken immediately before transplantation on a 5-point scale (modified version of the Eastern Cooperative Oncology Group performance status) and mortality 90 days after transplantation. Logistic regression was used to adjust for other risk factors.


RESULTS
Posttransplant mortality increased from 5.3% in patients able to carry out normal activity without restriction (functional status 1) to 24.8% in patients completely reliant on nursing and medical care (functional status 5; P for trend 0.003). This association remained after adjustment for conventional risk factors (adjusted P for trend 0.003). Adjusted odds ratios with functional status 3 (the most frequent functional status) as baseline category were 0.60 (95% confidence interval 0.29-1.25) for functional status 1, 0.70 (0.50-0.97) for functional status 2, 1.00 (0.71-1.41) for functional status 4, and 1.85 (1.07-3.19) for functional status 5.


CONCLUSIONS
Considering a patient's functional status or more general measures of a patient's health status before transplantation in addition to conventional clinical factors may help to improve our ability to predict posttransplant survival.
Jacob
Mathew
M
Health Services Research Unit, London School of Hygiene and Tropical Medicine, London, UK.
Copley
Lynn P
LP
Lewsey
James D
JD
Gimson
Alex
A
Rela
Mohamed
M
van der Meulen
Jan H P
JH
D000203:Activities of Daily Living; D015992:Body Mass Index; D005260:Female; D006801:Humans; D016030:Kidney Transplantation / Q000401:mortality* / Q000502:physiology*; D008107:Liver Diseases / Q000145:classification* / Q000503:physiopathology / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D018579:Patient Selection; D011237:Predictive Value of Tests; D011300:Preoperative Care; D011446:Prospective Studies; D015203:Reproducibility of Results; D012189:Retrospective Studies; D012648:Self Care; D016019:Survival Analysis; D013997:Time Factors