A generalization of the Weibull distribution with application to the analysis of survival data. (English) Zbl 0881.62017

Mudholkar, Govind S.; Srivastava, Deo Kumar; Kollia, Georgia D.

J. Am. Stat. Assoc. 91, No. 436, 1575-1583 (1996).

Summary: The Weibull distribution, which is frequently used for modeling survival data, is embedded in a larger family obtained by introducing an additional shape parameter. This generalized family not only contains distributions with unimodal and bathtub hazard shapes, but also allows for a broader class of monotone hazard rates. Furthermore, the distributions in this family are analytically tractable and computationally manageable. The modeling and analysis of survival data using this family is discussed and illustrated in terms of a lifetime dataset and the results of a two-arm clinical trial.

MSC:

62E10	Characterization and structure theory of statistical distributions
62P10	Applications of statistics to biology and medical sciences; meta analysis

Keywords:

bathtub and unimodal hazard rates; proportional hazards; total time on test transform