post1PYOm: Get person-years at risk and observed deaths after cancer
Description
Converts data.frame D into a list of objects containing information regarding person years at risk
of death after cancer and the number of deaths observed, in a defined time since exposure interval.
Usage
post1PYOm(D,brks=c(0,2,5),binIndx=1,yearEnd)
Arguments
D
Input data.frame with columns: yrdx, agedx, surv, and status (1=dead).
brks
A vector of break points in years used to form time since diagnosis bins.
binIndx
The index of the interval for which py are to be computed by calling this function.
yearEnd
The most recent year of available mortality data.
Value
element is a vector of deaths observed in the intervals, and the third is a scalar, the py-weighted midpoint of the time intervals.