R: A Cohort of Nickel Smelters in South Wales

nickel {Epi} | R Documentation

## A Cohort of Nickel Smelters in South Wales

### Description

The `nickel` data frame has 679 rows and 7 columns. The data concern a cohort of nickel smelting workers in South Wales and are taken from Breslow and Day, Volume 2. For comparison purposes, England and Wales mortality rates (per 1,000,000 per annum) from lung cancer (ICDs 162 and 163), nasal cancer (ICD 160), and all causes, by age group and calendar period, are supplied in the dataset `ewrates`.

### Format

This data frame contains the following columns:

`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)

### Source

Breslow NE, and Day N, Statistical Methods in Cancer Research. Volume II: The Design and Analysis of Cohort Studies. IARC Scientific Publications, IARC:Lyon, 1987.

### Examples

    data(nickel)
    str(nickel)

[Package Epi version 2.44 Index]