graft {icensBKL}

Homograft's Survival Times

Description

SOMETHING WILL COME HERE.

Usage

data(graft)

Format

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

idnr

identification number of a patient

Hsecond

0/1, equal to 1 if this is already the second homograft (replacement) for a given patient

Time variable and censoring indicators

timeFU

follow-up time after the operation (years)

homo.repl.biod

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

homo.failure

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

death

0/1, value of 1 indicates death timeFU years after the operation

Basic characteristics of the patients

age

age at operation (years)

gender

gender of the patient

0 = male=

male

1 = female=

female

Description of diagnosis

clamp.time

a simple way how to reflect the diagnosis, cross-clamp time (min)

position

codes between grafts which are anatomically correctly (concordant) and which are not correctly (discordant) placed. It has a close relationship to the diagnosis

0 = CONC =

concordant

1 = DISC =

discordant

type

further distinguishes discordant grafts according to the Truncus status

0 = CONC =

concordant

1 = DISC =

discordant, not Truncus

2 = TRUNCUS =

discordant, Truncus

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

0 = no =

no

1 = yes =

yes

Ross

further distinguishes concordant grafts according to the Ross status. This variable is also equal to 0 for all discordant grafts.

0 = no =

no

1 = yes =

yes

Features of the homografts

Hsize

size of the homograft (mm)

Hgraft

donor graft

0 = PH =

pulmonary donor graft

1 = AH =

aortic donor graft

Immunological factors

BG.compatible

is the blood group compatible between recipient and donor?

0 = no =

no

1 = yes =

yes

BG.recip

blood group of recipient

0 = 0 =

0

1 = A =

A

1 = B =

B

2 = AB =

AB

BG.donor

blood group of donor

0 = 0 =

0

1 = A =

A

1 = B =

B

2 = AB =

AB

Rh.recip

Rhesus factor of recipient

0 = n =

negative

1 = p =

positive

Rh.donor

Rhesus factor of donor

0 = n =

negative

1 = p =

positive

Iwarm

warm ischemia (ischemic time) (hours)

Icold

cold ischemia (ischemic time) (days)

Source

Department of Cardiac Surgery, University Hospital Gasthuisberg, Herestraat 49, 3000 Leuven, Belgium

References

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.

Examples

data("graft", package="icensBKL")
summary(graft)