[R] Survival analysis

[Jacques VESLOT]

Dear r-users,

I have longitudinal data with measures and a binary trait (status) made on hundreds of people every 
3 years during nine years.

I tried different models but I wonder if it is possible to use survival analysis.

If I take Surv(time, status), I have hundreds of ties and I am not sure it is a nice case to do 
survival analysis.

I wonder if I could take Surv(age, status) in a cox model with coxph() or a logrank test for a 
genotype factor with survdiff() since people enter the study at different ages which implies 
different survival time and thus very few ties.

Actually I can't find similar examples in documentation.

Thanks in advance.

jacques

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Jacques VESLOT

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