transplant: Liver transplant waiting list
In BART: Bayesian Additive Regression Trees
transplant R Documentation
Liver transplant waiting list
Description
Subjects on a liver transplant waiting list from 1990-1999, and their
disposition: received a transplant, died while waiting, withdrew from
the list, or censored.
Usage
data("transplant")
Format
A data frame with 815 observations on the following 6 variables.
ageage at addition to the waiting list
sexm or f
aboblood type: A, B, AB or O
yearyear in which they entered the waiting list
futimetime from entry to final disposition
eventfinal disposition: censored,
death,
ltx or withdraw
Details
This represents the transplant experience in a particular region,
over a time period in which liver transplant became much more widely
recognized as a viable treatment modality.
The number of liver transplants rises over the period, but the number of
subjects added to the liver transplant waiting list grew much faster.
Important questions addressed by the data are the change in waiting
time, who waits, and whether there was an consequent increase in deaths
while on the list.
Blood type is an important consideration. Donor livers from subjects
with blood type O can be used by patients with A, B, AB or O blood
types, whereas a donor liver from the other types will only be
transplanted to a matching recipient.
Thus type O subjects on the waiting list are at a disadvantage, since
the pool of competitors is larger for type O donor livers.
This data is of historical interest and provides a useful example of
competing risks, but it has little relevance to current
practice. Liver allocation policies have evolved and now depend
directly on each individual patient's risk and need, assessments of which are
regularly updated while a patient is on the waiting list.
The overall organ shortage remains acute, however.
References
Kim WR, Therneau TM, Benson JT, Kremers WK, Rosen CB, Gores GJ, Dickson
ER.
Deaths on the liver transplant waiting list: An analysis of competing risks.
Hepatology 2006 Feb; 43(2):345-51.
BART documentation built on June 22, 2024, 11:33 a.m.
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| transplant | R Documentation |
Liver transplant waiting list
Description
Subjects on a liver transplant waiting list from 1990-1999, and their disposition: received a transplant, died while waiting, withdrew from the list, or censored.
Usage
data("transplant")Format
A data frame with 815 observations on the following 6 variables.
ageage at addition to the waiting list
sexmorfaboblood type:
A,B,ABorOyearyear in which they entered the waiting list
futimetime from entry to final disposition
eventfinal disposition:
censored,death,ltxorwithdraw
Details
This represents the transplant experience in a particular region, over a time period in which liver transplant became much more widely recognized as a viable treatment modality. The number of liver transplants rises over the period, but the number of subjects added to the liver transplant waiting list grew much faster. Important questions addressed by the data are the change in waiting time, who waits, and whether there was an consequent increase in deaths while on the list.
Blood type is an important consideration. Donor livers from subjects with blood type O can be used by patients with A, B, AB or O blood types, whereas a donor liver from the other types will only be transplanted to a matching recipient. Thus type O subjects on the waiting list are at a disadvantage, since the pool of competitors is larger for type O donor livers.
This data is of historical interest and provides a useful example of competing risks, but it has little relevance to current practice. Liver allocation policies have evolved and now depend directly on each individual patient's risk and need, assessments of which are regularly updated while a patient is on the waiting list. The overall organ shortage remains acute, however.
References
Kim WR, Therneau TM, Benson JT, Kremers WK, Rosen CB, Gores GJ, Dickson ER. Deaths on the liver transplant waiting list: An analysis of competing risks. Hepatology 2006 Feb; 43(2):345-51.
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