R: Thorotrast Study

thoro {Epi} | R Documentation

## Thorotrast Study

### Description

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).

### 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.

### See Also

`mortDK`, `gmortDK`

### Examples

    data(thoro)
    str(thoro)

[Package Epi version 2.42 Index]