Hi all,
I am trying to fit a survival analysis to determine effect of two
factors on survival, factors have 3 and 5 levels respectively. N is 1050
and experiment is balanced. I have used "survival" package for analyses.
I have problems in select the best survival model for my data, I fit
several parametric models (weibull, expontential, gaussian, lognormal,
loglogistic, logistic) and a Cox model. Model selection was made by AICc
being Cox model the best option by this criteria, but I am not sure that
AIC is valid to compare parametric and non-parametric survival models.
Moreover, my data violates the proportional hazards assumption of Cox
models.
For all of this, I don't know what model select.
Thanks in advanced
Diego Salazar
--
Diego Francisco Salazar Tortosa
Phd. student
Departamento de Ecología
Facultad de Ciencias
Universidad de Granada
Av. Fuente Nueva s/n
18071 Granada
Telefono: +34 958241000 ext 20007
Movil: +34 634851132
email:dsala...@ugr.es
dftort...@gmail.com
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