Summary for Computations Related to Group Sequential Boundaries

Description

'summary' method for class '"drift"'.

Usage

## S3 method for class 'drift'
summary(object, ...)
## S3 method for class 'summary.drift'
print(x, digit = 5, ...)

Arguments

Value

The function 'summary.drift' returns a list of summary values of the group sequential boundary calculations given in 'object'.

Author(s)

Oscar A. Perez and T. Charles Casper charlie.casper@hsc.utah.edu

References

Reboussin, D. M., DeMets, D. L., Kim, K. M., and Lan, K. K. G. (2000) Computations for group sequential boundaries using the Lan-DeMets spending function method. Controlled Clinical Trials, 21:190-207.

Fortran program 'ld98' by the same authors as above.

DeMets, D. L. and Lan, K. K. G. (1995) Recent Advances in Clinical Trial Design and Analysis, Thall, P. F. (ed.). Boston: Kluwer Academic Publishers.

Lan, K. K. G. and DeMets, D. L. (1983) Discrete sequential boundaries for clinical trials. Biometrika, 70:659-63.

See Also

bounds for computation of boundaries using alpha spending function method. drift for exit probabilities given boundaries or drift (effect) or confidence interval given power.

Examples

## See function 'drift'

Results