How to write a basic survival model assuming the time follows the exponential distribution in rstan?

Modeling
1

Hi everyone, I am quite new to Stan and I am recently using rstan to build a very basic survival model assuming the followup time follows exponential distribution. Exp(theta).

I am wondering what should I write in this model as it has uncensored followup time and censored followup time— How should I reflect this in exponential model? Thanks !!!

2

There’s a section on censored data in the manual: https://mc-stan.org/docs/2_24/stan-users-guide/censored-data.html

Is that your situation?

3

Thank you bbbales2, this is my situation… Just wondering how to do this in exponential distribution ?

4

The same sorts of lcdf/lccdf functions exist for the exponentials as for the normal distribution: https://mc-stan.org/docs/2_24/functions-reference/exponential-distribution.html

So if this is the situation, then follow the guide in the manual and adapt the math for the particular censoring you have (instead of a normal distribution do stuff with the exponential).

2 Likes
5

kkk, seems worked out…

6

Cool glad it worked out! The user guide is really handy for these types of examples.