Lan-DeMets Method for Group Sequential Boundaries
Commonly Used Group Sequential Boundaries
Conditional Power Given Interim Results
Final Boundary Given Earlier Boundaries
Defunct functions in ldBounds
Group Sequential Boundaries Using Spending Functions
Power and Other Probabilities for Group Sequential Boundaries
Plot for Group Sequential Boundaries
Summary for Group Sequential Boundaries
Summary for Computations Related to Group Sequential Boundaries
Computations related to group sequential boundaries. Includes calculation of bounds using the Lan-DeMets alpha spending function approach. Based on FORTRAN program ld98 implemented by Reboussin, et al. (2000) <doi:10.1016/s0197-2456(00)00057-x>.