A data frame with 35 observations on the following 9 variables.
sex
a factor with levels Male Female
age
a numeric vector age at diagnosis in years
stage
a factor with levels Unknown Localised Regional Distant
mmdx
a numeric vector month of diagnosis (1-12)
yydx
a numeric vector year of diagnosis
surv_mm
a numeric vector time from diagnosis to exit (months)
surv_yy
a numeric vector time from diagnosis to exit (years)
status
a factor with levels Alive Dead: cancer Dead: other Lost to follow-up
subsite
a factor with levels Coecum and ascending Transverse Descending and sigmoid Other and NOS