R: Population risk time in Denmark

Y.dk {Epi} | R Documentation

## Population risk time in Denmark

### Description

Risk time (person-years) in the Danish population, classified by sex, age, period and date of birth in 1-year classes. This corresponds to triangles in a Lexis diagram.

### Usage

    data(Y.dk)

### Format

A data frame with 13860 observations on the following 6 variables.

`sex`

  Sex. 1:males, 2:females

`A`

  One-year age class

`P`

  Period

`C`

  Birth cohort

`Y`

  Person-years

`upper`

  Indicator of upper triangle in the Lexis diagram

### Details

The risk time is computed from the population size figures in `N.dk`, using the formulae devised in B. Carstensen: "Demography and epidemiology: Age-Period-Cohort models in the computer age", http://biostat.ku.dk/reports/2006/ResearchReport06-1.pdf/, later published as: B. Carstensen: Age-period-cohort models for the Lexis diagram. Statistics in Medicine, 10; 26(15):3018-45, 2007.

### Source

http://www.statistikbanken.dk/statbank5a/SelectTable/omrade0.asp?SubjectCode=02&PLanguage=1&ShowNews=OFF

### Examples

    data(Y.dk)
    str(Y.dk)
    # Compute mean age, period for the triangles
    attach( Y.dk )
    age <- A + (1+upper)/3
    per <- P + (2-upper)/3
    # Plot a Lexis diagram
    library( Epi )
    Lexis.diagram( age=c(0,10), date=c(1990,2000), coh.grid=TRUE, int=1 )
    box()
    # Print the person-years for males there
    text( per[sex==1], age[sex==1],
          formatC( Y[sex==1]/1000, format="f", digits=1 ) )

[Package Epi version 2.37 Index]