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)
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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