Table II.
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% |