R: Male lung cancer incidence in Denmark

lungDK {Epi} | R Documentation

## Male lung cancer incidence in Denmark

### Description

Male lung cancer cases and population riks time in Denmark, for the period 1943–1992 in ages 40–89.

### Usage

    data(lungDK)

### Format

A data frame with 220 observations on the following 9 variables.

`A5`: | Left end point of the age interval, a numeric vector.
`P5`: | Left enpoint of the period interval, a numeric vector.
`C5`: | Left enpoint of the birth cohort interval, a numeric vector.
`up`: | Indicator of upper trianges of each age by period rectangle in the Lexis diagram. (`up=(P5-A5-C5)/5`).
`Ax`: | The mean age of diagnois (at risk) in the triangle.
`Px`: | The mean date of diagnosis (at risk) in the triangle.
`Cx`: | The mean date of birth in the triangle, a numeric vector.
`D`: | Number of diagnosed cases of male lung cancer.
`Y`: | Risk time in the male population, person-years.

### Details

Cases and person-years are tabulated by age and date of diagnosis (period) as well as date of birth (cohort) in 5-year classes. Each observation in the dataframe correponds to a triangle in a Lexis diagram. Triangles are classified by age and date of diagnosis, period of diagnosis and date of birth, all in 5-year groupings.

### Source

The Danish Cancer Registry and Statistics Denmark.

### References

For a more thorough exposition of statistical inference in the Lexis diagram, see: B. Carstensen: Age-Period-Cohort models for the Lexis diagram. Statistics in Medicine, 26: 3018-3045, 2007.

### Examples

    data( lungDK )
    # Draw a Lexis diagram and show the number of cases in it.
    attach( lungDK )
    Lexis.diagram( age=c(40,90), date=c(1943,1993), coh.grid=TRUE )
    text( Px, Ax, paste( D ), cex=0.7 )

[Package Epi version 2.40 Index]