Table 5.

Comparison of design parameters and resulting expected sample sizes between (1) the first design in Table 1 in Whitehead et al. (2009), (2) the δ-minimax design with n₁ constrained to be 45, and (3) the δ-minimax design with n₁ unconstrained

	Whitehead's	δ-minimax n1 = 45	δ-minimax n1 unconstrained
n1 per arm	45	45	54
f	0	0.850	1.110
e1	2.730	2.367	2.303
n2 per arm	39	52	42
e2	1.977	2.023	2.018
(N | δ = 0)	128.75	109.75	118.45
(N | δ = 0.5)	152.71	139.73	140.38
(N | δ = 1)	146.79	142.28	140.71