Published in:
Open Access 01-12-2009 | Research article
A semiparametric Bayesian proportional hazards model for interval censored data with frailty effects
Published in: BMC Medical Research Methodology | Issue 1/2009
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Background
Multivariate analysis of interval censored event data based on classical likelihood methods is notoriously cumbersome. Likelihood inference for models which additionally include random effects are not available at all. Developed algorithms bear problems for practical users like: matrix inversion, slow convergence, no assessment of statistical uncertainty.
Methods
MCMC procedures combined with imputation are used to implement hierarchical models for interval censored data within a Bayesian framework.
Results
Two examples from clinical practice demonstrate the handling of clustered interval censored event times as well as multilayer random effects for inter-institutional quality assessment. The software developed is called survBayes and is freely available at CRAN.
Conclusion
The proposed software supports the solution of complex analyses in many fields of clinical epidemiology as well as health services research.