CODEWITHSUNDEEP
survival-analysis
gabagool
gabagool

Reputation: 1161

survival analysis with two levels of censoring

I'm trying to figure out this problem from Applied Survival Analysis by Hosmer, Lemeshow, and May, 2nd edition. Chapter 7, #3

In the GBCS data, does hormone use improve survival after cancer recurrence, controlling for tumor grade and size?

The data information can be seen here

I am confused about how to handle the data. There are two censoring variables: recurrence and death. I am not sure how to handle the subjects who do not have recurrence.

Upvotes: 0

Views: 84

Answers (1)

jrdnmdhl
jrdnmdhl

Reputation: 1955

The example defines TWO separate time-to-event distributions: 1. Time to recurrence 2. Time to death (i.e. survival)

Assuming #2 starts at the same time as #1, you should first subset the data so only patients who have a recurrence are included and then define a new time-to-event variable whose time is survtime-rectime and whose flag is simply censdead. This gives you time from recurrence to death.

Upvotes: 0

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