The thoro
data frame has 2470 rows and 14 columns.
Each row represents one patient that have had cerebral angiography (X-ray of
the brain) with an injected contrast medium, either Thorotrast or
another one (the controls).
This data frame contains the following columns:
id
Identification of person.
sex
Sex, 1: male / 2: female.
birthdat
Date of birth, Date
variable.
contrast
Group, 1: Thorotrast / 2: Control.
injecdat
Date of contrast injection, Date
variable.
volume
Injected volume of Thorotrast in ml. Control patients have a 0 in this variable.
exitdat
Date of exit from the study, Date
variable.
exitstat
Status at exit, 1: dead / 2: alive, censored at closing of study, 20 February 1992 / 3: censored alive at some earlier date.
cause
Cause of death. See causes in the helpfile for
gmortDK
.
liverdat
Date of liver cancer diagnosis, Date
variable.
liver
Indicator of liver cancer diagnosis. Not all livercancers
are histologically verified, hence
liver >= hepcc + chola + hmang
hepcc
Hepatocellular carcinoma at liverdat
.
chola
Cholangiocellular carcinoma at liverdat
.
hmang
Haemangisarcoma carcinoma at liverdat
.
mortDK
, gmortDK