Design and Monitoring of Survival Trials Accounting for Complex Situations

Calculates various functions needed for design and monitoring survival trials accounting for complex situations such as delayed treatment effect, treatment crossover, non-uniform accrual, and different censoring distributions between groups. The event time distribution is assumed to be piecewise exponential (PWE) distribution and the entry time is assumed to be piecewise uniform distribution. As compared with Version 1.2.1, two more types of hybrid crossover are added. A bug is corrected in the function "pwecx" that calculates the crossover-adjusted survival, distribution, density, hazard and cumulative hazard functions. Also, to generate the crossover-adjusted event time random variable, a more efficient algorithm is used and the output includes crossover indicators.


Reference manual

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1.3.0 by Xiaodong Luo, 3 years ago

Browse source code at

Authors: Xiaodong Luo [aut, cre] , Xuezhou Mao [ctb] , Xun Chen [ctb] , Hui Quan [ctb] , Sanofi [cph]

Documentation:   PDF Manual  

GPL (>= 2) license

Imports survival, stats

Imported by NBDesign, goldilocks.

See at CRAN