Format
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.
Source
M Andersson, M Vyberg, J Visfeldt, B Carstensen & HH Storm:
Primary liver tumours among Danish patients exposed to Thorotrast.
Radiation Research, 137, pp. 262--273, 1994. M Andersson, B Carstensen HH Storm: Mortality and cancer
incidence after cerebral angiography. Radiation Research, 142,
pp. 305--320, 1995.