getWeilbull {debest}

Estimate parameters of the Weibull survival distributions for each subgroup.

Description

Estimate parameters of the Weibull survival distributions for each subgroup.

Usage

getWeilbull(dat)

Arguments

dat

- data frame of three columns: 1) time: follow up time; 2) status: indicator, 0=no event, 1=event; 3) group, integer 1,...,n, for each subgroup of patients.

Value

shape and scale parameters of the Weibull distribution for each subgroup.

References

Hong Zhang, Jie Pu, Shibing Deng, Satrajit Roychoudhury, Haitao Chu and Douglas Robinson. "Study Duration Prediction for Clinical Trials with Time-to-Event Endpoints Using Mixture Distributions Accounting for Heterogeneous Population", arXiv:2401.00540.

Examples

# dat_udca already has time, status and group columns defined,
getWeilbull(dat_udca)