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. Author manuscript; available in PMC: 2010 Nov 9.
Published in final edited form as: J Biopharm Stat. 2009;19(3):437–455. doi: 10.1080/10543400902800486

Table II.

Simulation Results Based on 10,000 Realizations for Distribution 1

Traditional Method CRM with Escalation/De-escalation Decisions Based on Complete Cohorts CRM with Escalation/De-escalation Decisions Based on Incomplete Cohorts
Dose Actual Toxicity Probability Percent Chosen Experimentation Percentage Percent Chosen Experimentation Percentage Percent Chosen Experimentation Percentage
1 5% 9.9% (2.5%)* 24.6% 4.1% (0.63%)* 20.8% 3.5% (0.58%)* 20.0%
2 10% 28.8% 27.2% 24.3% 29.5% 22.9% 28.5%
3 20% 38.3% 26.3% 46.8% 30.5% 47.9% 30.8%
4 35% 17.3% 16.2% 22.0% 15.5% 22.9% 16.4%
5 50% 3.2% 5.0% 2.1% 3.4% 2.2% 4.0%
6 70% 0.0% 0.7% 0.0 0.3% 0.04% 0.3%
Median Sample Size (Range) 18 (3–36) 15 (2–37) 16 (2–35)
Median % Toxicity (Range) 19.1%(5–67) 18.2% (0–100%) 18.8% (0–100%)
% of Trials Revisiting a Dose with ≥ 2 DLTs - 14.5% 31.3%
% of Trials with ≥ 3 DLTs at a Dose 27% 15.4% 19.5%