TABLE 1.

Combination of the decision rules in the 3‐arm 2‐stage trial with ${\theta }^{(1)}\ge {\theta }^{(2)}$

	$Z_j^{(1)}\ge u_j^{(1)}$	$l_j^{(1)}<Z_j^{(1)}<u_j^{(1)}$	$Z_j^{(1)}\le l_j^{(1)}$
$Z_j^{(2)}\ge u_j^{(2)}$	Stop: select $T_1,T_2$	Proceed with T 1, T 2	Proceed with T 1, T 2
$l_j^{(2)}<Z_j^{(2)}<u_j^{(2)}$	Proceed with $T_2$	Proceed with $T_1,T_2$	Drop both arms
$Z_j^{(2)}\le l_j^{(2)}$	Stop: select $T_1$	Proceed with $T_1$	Drop both arms

Note: Cells colored in red correspond to contradicting evidence.