refinedBoundary | R Documentation |
Primary boundaries, refined secondary boundaries, and nominal significance for the secondary endpoint are listed.
refinedBoundary(
alpha,
tVec,
pOBF = TRUE,
sOBF = FALSE,
LanDeMets = FALSE,
digits = 2
)
alpha |
type I error probability. |
tVec |
vector of relative information levels. The last element in the vector is 1. |
pOBF |
type of primary boundary, |
sOBF |
type of secondary boundary, |
LanDeMets |
type of boundary, |
digits |
number of digits after decimal point for primary and secondary boundaries. |
This function gives a list including primary boundary, refined secondary boundary, and the nominal significance for the secondary endpoint.
The number of digits for the nominal significance depends on parameter alpha
.
a result list including primary boundary, refined secondary boundary, and the nominal significance for the secondary endpoint.
Jiangtao Gou
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Jennison, C. and Turnbull, B. W. (2000). Group Sequential Methods with Applications to Clinical Trials. Chapman and Hall/CRC, New York.
Lan, K. K. G., and Demets, D. L. (1983). Discrete sequential boundaries for clinical trials. Biometrika 70, 659-663.
O'Brien, P. C., and Fleming, T. R. (1979). A multiple testing procedure for clinical trials. Biometrics 35, 549-556.
Pocock, S. J. (1977). Group sequential methods in the design and analysis of clinical trials. Biometrika 64, 191-199.
Tamhane, A. C., Mehta, C. R., and Liu, L. (2010). Testing a primary and a secondary endpoint in a group sequential design. Biometrics 66, 1174-1184.
Tamhane, A. C., Gou, J., Jennison, C., Mehta, C. R., and Curto, T. (2018). A gatekeeping procedure to test a primary and a secondary endpoint in a group sequential design with multiple interim looks. Biometrics, 74, 40-48
require(mvtnorm)
require(ldbounds)
result <- refinedBoundary(alpha=0.05,tVec=c(0.2,0.6,1))
result$primaryBoundary
result$secondaryBoundary
result$nomialSignificance
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