A data frame with 7775 observations on the following 18 variables.
sex
a factor with levels Male Female
age
a numeric vector for age at diagnosis in years (0-99)
stage
a factor with levels Unknown Localised Regional Distant
mmdx
a numeric vector for the month of diagnosis (1-12)
yydx
a numeric vector for the year of diagnosis (1975-1994)
surv_mm
a numeric vector observed time from diagnosis
to end of follow-up in months (0.5-251.5)
surv_yy
a numeric vector observed time from diagnosis
to end of follow-up in years (0.5-20.5)
status
a factor with levels Alive Dead: cancer Dead: other Lost to follow-up
subsite
a factor with levels Head and Neck Trunk Limbs Multiple and NOS
year8594
a factor with levels Diagnosed 75-84 Diagnosed 85-94
dx
a Date date of diagnosis
exit
a Date date of exit
agegrp
a factor with levels 0-44 45-59 60-74 75+
id
a numeric vector individual identifier
ydx
a numeric vector for continuous year of diagnosis
yexit
a numeric vector for continuous year of exit