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Table 2 Average efficiency relative to an updating interval of 20 participants according to the distribution of the acceptance probabilities for the less accepted interventions

From: Preference-adaptive randomization in comparative effectiveness studies

Updating interval

Acceptance probabilities for

 

less accepted interventions

 

Even

Uneven

1

1.16

1.26

3

1.08

1.15

5

1.05

1.11

10

1.02

1.05

  1. Even: All set to 0.5 times the acceptance probability for the arm with the largest acceptance probability. Uneven: Set to 0.2, 0.4, 0.6 and 0.8 times the acceptance probability for the arm with the largest acceptance probability.