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Table 4 Impact of selection bias effect η=0.09 and linear time trend effect θ=0.26 with σ=0.73 on probability of type I error for Wei’s urn design

From: ERDO - a framework to select an appropriate randomization procedure for clinical trials

Randomization Type I Error P RP (ω≤0.05)
Procedure Probability  
[R P] [mean]  
UD(0,1) 0.051 0.44
UD(0,2) 0.051 0.44
UD(0,3) 0.051 0.44
UD(1,1) 0.051 0.47
UD(1,2) 0.051 0.46
UD(1,3) 0.051 0.45
UD(2,1) 0.051 0.48
UD(2,2) 0.051 0.47
UD(2,3) 0.051 0.46