Summary
We develop an approximate Bayesian analysis for hazard models with shape parameters dependent on covariates. We consider a general hazard regression model which includes, among others, the proportional hazards and the accelerated failure time models, with the inverse power law and the Arrhenius models as relationship of the scale parameter and a covariate, while preserves flexibility to fit datasets where shape parameter depending on covariates is observed. The advantage of this procedure is that it leads to a single algorithm for fitting hazard-based models, and model comparation is easily done through Bayes factors. We use Laplace’s method to find the marginal posterior densities of interest. As advantage we obtain simple expressions for the posterior densities. The Weibull particular case is studied in detail. The methodology is illustrated with an accelerated lifetime test on an electrical insulation film.
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References
Box, G.E.P. and Tiao, G.C. (1973) Bayesian Inference in Statistical Analysis, John Wiley & Sons.
Cox, D.R. (1972), “Regression models and life tables” (with discussion), Journal of the Royal Statistical Society B, 34, 187–220.
Cox, D.R. (1995), “The relation between theory and application in statistics” (with discussion), Test, 4, 207–261.
Davison, A.C. and Hinkley, D.V. (1997), Bootstrap Methods and their Application, Cambridge University Press.
Etezadi-Amoli, J. and Ciampi, A. (1987), “Extended hazard regression for censored survival data with covariates: a spline approximation for the baseline hazard function”, Biometrics, 43, 181–192.
Gelfand, A.E. and Smith, A.F.M. (1990), “ Samplin-based approaches to calculating marginal densities”, Journal of the American Statistical Association, 85, 398–409.
Hirose, H. (1993), “Estimation of threshold stress in accelerated life-testing”, IEEE Transactions on Reliability, 42, 650–657.
Hutton, J.L. and Solomon, P.J. (1997), “Parameter orthogonality in mixed regression models for survival data”, Journal of the Royal Statistical society B, 59, 125–136.
Kalbfleisch, J.D. and Prentice, R.L. (1980), The Statistical Analysis of Failure Time Data, John Wiley & Sons.
Kass, R.E. and Raftery, A.E. (1995), “Bayes factors”, Journal of the American Statistical Association, 90, 773–795.
Kass, R.E., Tierney, L. and Kadane, J.B. (1990), “The validity of posterior expansions based on Laplace’s method”, in Geisser, S., Hodges, J.S., Press, S.J. and Zellner, A. (eds), Bayesian and Likelihood Methods in Statistics and Econometrics: Essays in Honor of George A. Barnard, 473–488, North-Holland.
Lawless, J.F. (1982) Statistical Models and Methods for Lifetime Data, John Wiley & Sons.
Louzada-Neto, F. (1997), “Extended hazard regression model for reliability and survival analysis”, Lifetime Data Analysis, 3, 367–381.
Mann, N.R., Schaffer, R.E. and Singpurwalla, N.D. (1974) Methods for Statistical Analysis of Reliability and Life test Data, John Wiley & Sons.
Meeter, C.A. and Meeker, W.Q. (1994), “Optimum accelerated life tests with a nonconstant scale parameter”, Technometrics, 36, 71–83.
Naylor, J.C. and Smith, A.F.M. (1982). “Applications of a method for efficient computation od posterior distributions”, Applied Statistics, 31, 214–225.
Nelson, W. (1990) Accelerated Testing — Statistical Models, Test Plans and Data Analyses, John Wiley & Sons.
Prentice, R.L. (1978), “Linear rank tests with right censored data”, Biometrika, 65, 167–179.
Tierney, L. and Kadane, J.B. (1986), “Accurate approximations for posterior moments and marginal densities” Journal of the American Statistical Association, 81, 82–86.
Acknowledgements
The author is very grateful to his supervisors, D.R. Cox, A.C. Davison and D.V. Hinkley, to J. Carpenter, and to an Associate Editor and referees for their comments and suggestions on this work. Part of the research was completed while the author was on leave from the Universidade Federal de São Carlos, studing for his doctorate at the University of Oxford. The work was supported by Conselho Nacional de Desenvolvimento Científico e Tecnológico, Brazil.
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Louzada-Neto, F. Bayesian Analysis for Hazard Models with Non-constant Shape Parameter. Computational Statistics 16, 243–254 (2001). https://doi.org/10.1007/s001800100063
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DOI: https://doi.org/10.1007/s001800100063