Epi (version 2.34)

lungDK: 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.

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

# NOT RUN {
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 )
# }