lungDK {Epi} | R Documentation |
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: http://staff.pubhealth.ku.dk/~bxc/APC/notes.pdf
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 )