Dear all,
I'm looking for software for the following data situation:
- Multivariate survival data (Recurrent diarrhea infections)
- (Continuous) time dependent covariates (different time scales
like age, time since beginning of the study, etc. )
- Random effect (frailty) to model the heterogeneity among
individuals or marginal approach (WLW, PWP model) to adjust the variance
estimators
I would like to fit an extended Cox model using a frailty term or an robust
variance estimation to estimate risk factors for diarrhea infections.
What I know:
In S-Plus it is possible but not with continuous covariates.
In STATA incl. of frailty it is possible but only for parametric Survival
analysis
In SAS I found some macros for an robust WLW approach but they do not work
with time dependent covariates
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Dr Bernd Genser
Department of Public Health
Federal University of Bahia
Salvador, Brazil
email: [log in to unmask]
<http://www.bgstats.com> www.bgstats.com
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