Male lung cancer incidence in Denmark
Male lung cancer cases and population riks time in Denmark, for the period 1943–1992 in ages 40–89.
data(lungDK)
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. |
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.
The Danish Cancer Registry and Statistics Denmark.
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.
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 )
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