graft | R Documentation |
SOMETHING WILL COME HERE.
data(graft)
a data frame with 301 rows (272 patients; 243 patients contributing one observation, 29 patients contributiong two observations) and the variables that can be divided into the following conceptual groups:
Identification of the patient and the homograft
identification number of a patient
0/1, equal to 1 if this is already the second homograft (replacement) for a given patient
Time variable and censoring indicators
follow-up time after the operation (years)
0/1, value of 1 indicates that the homograft
failed after the time timeFU
because of biodegeneration, that is for other reasons than
infection. Value of 0 indicates right censoring when considering
the failure of the homograft because of biodegeneration as event
0/1, value of 1 indicates that the homograft
failed after the time timeFU
for various reasons.
Value of 0 indicates right censoring
when considering the failure of the homograft as event
0/1, value of 1 indicates death timeFU
years
after the operation
Basic characteristics of the patients
age at operation (years)
gender of the patient
male
=male
female
=female
Description of diagnosis
a simple way how to reflect the diagnosis, cross-clamp time (min)
codes between grafts which are anatomically correctly (concordant) and which are not correctly (discordant) placed. It has a close relationship to the diagnosis
CONC
=concordant
DISC
=discordant
further distinguishes discordant grafts according to the Truncus status
CONC
=concordant
DISC
=discordant, not Truncus
TRUNCUS
=discordant, Truncus
further distinguishes discordant grafts according to the Truncus status. This variable is equal to 0 for all concordant grafts and for all discordant, not Truncus grafts
no
=no
yes
=yes
further distinguishes concordant grafts according to the Ross status. This variable is also equal to 0 for all discordant grafts.
no
=no
yes
=yes
Features of the homografts
size of the homograft (mm)
donor graft
PH
=pulmonary donor graft
AH
=aortic donor graft
Immunological factors
is the blood group compatible between recipient and donor?
no
=no
yes
=yes
blood group of recipient
0
=0
A
=A
B
=B
AB
=AB
blood group of donor
0
=0
A
=A
B
=B
AB
=AB
Rhesus factor of recipient
n
=negative
p
=positive
Rhesus factor of donor
n
=negative
p
=positive
warm ischemia (ischemic time) (hours)
cold ischemia (ischemic time) (days)
Department of Cardiac Surgery, University Hospital Gasthuisberg, Herestraat 49, 3000 Leuven, Belgium
Meyns, B., Jashari, R., Gewillig, M., Mertens, L., Kom\mbox{\'a}
rek, A.,
Lesaffre, E., Budts, W., and Daenen, W. (2005).
Factors influencing the survival of cryopreserved homografts. The
second homograft performs as well as the first.
European Journal of Cardio-thoracic Surgery, 28, 211-216.
data("graft", package="icensBKL")
summary(graft)
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