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Estimate baseline parameters in the Gumbel–Hougaard model for sample size calculation using pilot data

gumbel.est.Rd

Estimate baseline parameters in the Gumbel–Hougaard model described in base for sample size calculation using pilot study data.

Usage

gumbel.est(id, time, status)

Arguments

id

A vector of unique patient identifiers.

time

A numeric vector of event times.

status

A vector of event type variable; 2 = nonfatal event, 1 = death, and 0 = censoring.

Value

A list containing lambda_D for \(\lambda_D\), lambda_H for \(\lambda_H\), and kappa for \(\kappa\) in the Gumbel–Hougaard model.

References

Mao, L., Kim, K. and Miao, X. (2021). Sample size formula for general win ratio analysis. Biometrics, https://doi.org/10.1111/biom.13501.

See also

base, WRSS

Examples

# see the example for WRSS