Head and neck cancer survival data from the Northern California Oncology Group (NCOG), from Section 9.2. Patients were randomized to one of two treatment arms.
Format
A data frame with survival time information and variables:
- t
Time in months until death or censoring
- d
Death indicator: 1 = death observed, 0 = censored
- arm
Treatment arm: "A" = Chemotherapy, "B" = Chemotherapy + Radiation
- day
Day of event/censoring
- month
Month of event/censoring
- year
Year of event/censoring