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. Author manuscript; available in PMC: 2017 Jun 23.
Published in final edited form as: Clin Trials. 2008;5(3):181–193. doi: 10.1177/1740774508091815

Table 3.

Operating characteristics for Scenario 3: varying effectiveness for treatments 1 and 3. Treatment 2 is equally effective and Treatment 3 is equally ineffective for marker groups 1–5; adaptive randomization utilized with no early stopping rule; and with varying informative priors σ2=100, 10, 1, and τ2=106

Marker group
Treatment 1 2 3 4 5
True disease control rate/Observed disease control rate {1/2/3}
1 0.8/0.78/0.80/0.79 0.8/0.79/0.80/0.79 0.6/0.58/0.58/0.59 0.6/0.58/0.58/0.59 0.3/0.24/0.24/0.29
2 0.6/0.55/0.57/0.58 0.6/0.58/0.57/0.58 0.6/0.59/0.60/0.59 0.6/0.58/0.58/0.59 0.6/0.55/0.54/0.56
3 0.6/0.58/0.55/0.57 0.3/0.27/0.26/0.28 0.6/0.58/0.58/0.60 0.3/0.27/0.28/0.28 0.3/0.24/0.25/0.27
4 0.3/0.26/0.27/0.28 0.3/0.28/0.26/0.27 0.3/0.28/0.28/0.28 0.3/0.27/0.27/0.28 0.3/0.25/0.24/0.26
Model-based posterior mean of the disease control rate {1/2/3}
1 0.77/0.78/0.74 0.78/0.78/0.75 0.58/0.58/0.59 0.58/0.58/0.59 0.27/0.29/0.42
2 0.55/0.57/0.58 0.57/0.57/0.58 0.59/0.59/0.59 0.58/0.59/0.58 0.55/0.55/0.57
3 0.58/0.55/0.53 0.28/0.28/0.32 0.58/0.57/0.57 0.28/0.29/0.32 0.26/0.28/0.34
4 0.27/0.29/0.30 0.29/0.27/0.29 0.29/0.29/0.29 0.28/0.28/0.29 0.27/0.27/0.29
Average sample size {1/2/3}
1 9.3/9.4/9.1 13.4/13.6/12.8 16.5/16.5/16.5 14.9/15.0/14.9 4.6/4.6/5.1
2 7.6/7.7/7.9 11.1/11.0/11.3 16.4/16.5/16.5 14.6/14.9/15.0 6.6/6.8/6.2
3 7.8/7.6/7.4 8.0/7.9/8.5 16.3/16.0/16.1 10.6/10.5/10.8 4.5/4.7/4.7
4 5.7/5.8/5.8 8.2/7.8/7.8 11.8/11.8/12.0 10.5/10.4/10.3 4.5/4.4/4.3
Total 30.5/30.5/30.2 40.7/40.4/40.4 61.0/60.9/61.1 50.5/50.7/50.9 20.2/20.5/20.3
Probability of declaring effective treatment {1/2/3}
1 0.95/0.96/0.97 0.98/0.99/0.99 0.91/0.91/0.93 0.89/0.89/0.92 0.15/0.16/0.33
2 0.71/0.75/0.79 0.83/0.80/0.86 0.91/0.92/0.95 0.89/0.88/0.91 0.68/0.68/0.75
3 0.76/0.71/0.71 0.18/0.15/0.19 0.90/0.89/0.91 0.16/0.18/0.19 0.16/0.17/0.17
4 0.18/0.18/0.17 0.17/0.17/0.14 0.17/0.19/0.18 0.16/0.15/0.16 0.19/0.16/0.11
1

The entries {1/2/3} correspond to σ2=100(1); σ2=10(2); and σ2=1(3), respectively.