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Table 3 Chart of the ratio of imbalance given the two sample sizes of 66 and 264

From: Randomization in substance abuse clinical trials

 

Ratio of Imbalance (n = 66)/(n = 264)

RANDOMIZATON PROCEDURE

cocaine (50:50) ratio

gender (25:75) ratio

COMPLETE OR SIMPLE

1.99

2.50

STRATIFIED SIMPLE

  

URN

3.04

1.53

STRATIFIED URN

1.90

2.80

BLOCKED

1.56

2.65

STRATIFIED BLOCKED

  

COVARIATE ADAPTIVE (2)

2.38

0.80

COVARIATE ADAPTIVE (5)

2.21

1.20

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Substance Abuse Treatment, Prevention, and Policy

ISSN: 1747-597X