Table 2.

Comparisons of total imbalance scores B by allocation strategies

		Mean	0%	25%	50%	75%	100%
Panel (a): n = 80
Dynamic block randomization
	Block size = 20	0.010	0	0.008	0.010	0.013	0.021
	Block size = 10	0.038	0.005	0.028	0.038	0.049	0.097
Minimization
	Pk = 2/3	0.155	0.008	0.080	0.130	0.204	0.747
	Pk = 3/4	0.090	0.004	0.048	0.073	0.117	0.482
	Pk = 0.8	0.067	0.004	0.035	0.056	0.084	0.380
	Pk = 0.9	0.037	0.002	0.021	0.032	0.048	0.177
	Pk = 1	0.024	0.003	0.015	0.021	0.031	0.084
Simple randomization		0.349	0.018	0.196	0.305	0.458	1.703
Panel (b): n = 60
Dynamic block randomization
	Block size = 20	0.020	0	0.015	0.021	0.025	0.039
	Block size = 10	0.065	0.004	0.048	0.064	0.081	0.153
Minimization
	Pk = 2/3	0.249	0.016	0.129	0.213	0.331	1.073
	Pk = 3/4	0.149	0.005	0.080	0.122	0.194	0.933
	Pk = 0.8	0.119	0.004	0.062	0.098	0.153	0.539
	Pk = 0.9	0.067	0.004	0.037	0.056	0.086	0.276
	Pk = 1	0.044	0.003	0.026	0.040	0.055	0.275
Simple randomization		0.459	0.041	0.261	0.399	0.611	1.894
Panel (c): n = 40
Dynamic block randomization
	Block size = 20	0.047	0	0.035	0.045	0.059	0.118
	Block size = 10	0.140	0.010	0.104	0.136	0.174	0.657
Minimization
	Pk = 2/3	0.445	0.027	0.251	0.386	0.570	2.109
	Pk = 3/4	0.308	0.026	0.165	0.265	0.406	1.293
	Pk = 0.8	0.245	0.023	0.132	0.205	0.317	1.427
	Pk = 0.9	0.161	0	0.087	0.138	0.208	1.103
	Pk = 1	0.101	0.010	0.062	0.089	0.127	0.452
Simple randomization		0.703	0.057	0.398	0.630	0.913	2.461