In this study, patients with burn-wound infections were followed until a
staphylococcus infection occurred. Of primary interest in the study is a
comparison of two methods of body cleansing: a routine bathing care
method
and a body cleansing method using 4% chlorhexidine gluconate. Among the
covariates, two time-dependent covariates were recorded, namely, time to
excision and time to prophylactic antibiotic treatment administered,
along
with the two corresponding indicator variables, namely, whether or not
the patient's wound had been excised and whether or not the patient had
been treated with an antibiotic sometime during the course of the study.
The variables represented in the dataset are as follows:
Observation number
Z1--Treatment
0-routine bathing 1-Body cleansing
Z2--Gender
0=male 1=female
Z3--Race
0=nonwhite 1=white
Z4--Percentage of total surface area burned
Z5--Burn site on head
1=yes, 0=no
Z6--Burn site on buttock
1=yes, 0=no
Z7--Burn site on trunk
1=yes, 0=no
Z8--Burn site on upper leg
1=yes, 0=no
Z9--Burn site on lower leg
1=yes, 0=no
Z10--Burn site on respiratory tract
1=yes, 0=no
Z11--Type of burn
1=chemical, 2=scald, 3=electric, 4=flame
T1--Time (in days) to excision or on study time
delta1 --Excision indicator
1=yes 0=no
T2--Time (in days) to prophylactic antibiotic treatment or on study time
delta2 --Prophylactic antibiotic treatment
1=yes 0=no
T3--Time (in days) to staphylococcus aureus infection or on study time
delta3 --Staphylococcus aureus infection
1=yes 0=no
Reference Ichida et al. Stat. Med.
12 (1993): 301-310.