R: Nickel smelters in South Wales, expanded

nickel.expand {ISwR} | R Documentation

## Nickel smelters in South Wales, expanded

### Description

The data concern a cohort of nickel smelting workers in South Wales, with information on exposure, follow-up period, and cause of death, as in the `nickel` data. This version has follow-up times split according to age groups and is merged with the mortality rates in `ewrates`.

### Usage

    nickel.expand

### Format

A data frame with 3724 observations on the following 12 variables:

`agr`

  age class: 10: 10–14, 15: 15–19, ....

`ygr`

  calendar period, 1931: 1931–35, 1936: 1936–40, ... .

`id`

  subject identifier (numeric).

`icd`

  ICD cause of death if dead, 0 otherwise (numeric).

`exposure`

  exposure index for workplace (numeric).

`dob`

  date of birth (numeric).

`age1st`

  age at first exposure (numeric).

`agein`

  age at start of follow-up (numeric).

`ageout`

  age at end of follow-up (numeric).

`lung`

  lung cancer mortality rate per 1 million person-years.

`nasal`

  nasal cancer mortality rate per 1 million person-years.

`other`

  all cause mortality rate per 1 million person-years.

### Source

Computed from `nickel` and `ewrates` data sets.

[Package ISwR version 2.0-7 Index]