[R] Survival analysis

From: Jacques VESLOT <jacques.veslot_at_good.ibl.fr>
Date: Thu 11 May 2006 - 21:50:49 EST


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



Jacques VESLOT

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Tel : 33 (0)3.20.87.10.44
Fax : 33 (0)3.20.87.10.31

http://www-good.ibl.fr



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