Y.dk: Population risk time in Denmark
In Epi: Statistical Analysis in Epidemiology

Y.dk	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: 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 ) )

Epi documentation built on Oct. 1, 2024, 5:07 p.m.