February, 2003
© 2000, 2001 Scott S. Emerson, M.D., Ph.D.
Session 3: 33
Boundary Scales
Unified family of group sequential designs (Kittelson and Emerson, 1999)
Defined for estimate of treatment effect (sample mean scale)
Includes Pocock (1977), O’Brien and Fleming (1979), Whitehead and Stratton (1983), Wang and Tsiatis (1987), Emerson and Fleming (1989), Pampallona and Tsiatis (1994), Xiong (1995)