[R] Survival Analysis and Predict time-to-death

[David Winsemius]

It depends on several factors. You need answers to all these questions:  How many events occurred, ... and was the period of observation long enough to cover a significant fraction of the life expectancy, …. and is there external evidence or theory that will help establish that this process should follow Weibull statistics?

— 
David.

> On Aug 17, 2015, at 2:18 PM, survivalUser <tufanomichele at hotmail.it> wrote:
> 
> Thank you David for your answer.
> 
> Some follow-up questions:
> 
> - So, do you think that try to estimate the life expectancy would be risky
> and probably not justifiable? Is there some sort of 'confidence' that the
> model could give me for a prediction?
> 
> - type=response - I found it here: 
> https://stat.ethz.ch/R-manual/R-devel/library/survival/html/predict.survreg.html
> 
> I have not tried it yet, but I was planning to use that because it says that
> predict the "original scale of the data".
> 
> - Yes, I think they are time-varying predictors. Would you suggest other
> models? (coxph?)
> 
> Overall, do you think this analysis is feasible/correct? Predicting how much
> time a new individual (with those covariates) will be alive till death, is a
> reasonable thing to predict with survival model?
> 
> Thank you again!
> 
> 
> 
> 
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