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  3. Survival Analysis in R

Exercise

Survival curve quantiles from a Weibull model

We can now estimate the survival of the breast cancer patients in the GBSG2 data using a Weibull model.

The predict() function with type = "quantile" allows us to compute the quantiles of the distribution function. As we learned in this course so far, the survival function is 1 - the distribution function (\(S = 1 - D\)), so we can easily compute the quantiles of the survival function using the predict() function.

The survival package and GBSG2 data are loaded for you in this exercise.

Instructions

100 XP
  • Estimate a Weibull model for the breast cancer patients.
  • Get the time point at which the probability of surviving longer than that time point is 70 Percent (using the predict() function with type = "quantile").