Table 3.
Summary statistics for BTNL and four applications of the proposed method: (1) complete order schedules, no stopping rule, (2) partial order schedules, no stopping rule, (3) complete order schedules, stopping rule, and (4) partial order schedules, stopping rule. Acceptable combination is defined as any combination within ± 10% of the target.
| Scenario | |||||||
|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | |
| Probability of selecting an acceptable combination as MTD
| |||||||
| BTNL | 0.87 | 0.81 | 0.88 | n/a | 0.71 | 0.72 | 0.54 |
| Proposed (complete, no stop) | 0.73 | 0.86 | 0.87 | n/a | 0.81 | 0.85 | 0.70 |
| Proposed (partial, no stop) | 0.78 | 0.84 | 0.82 | n/a | 0.82 | 0.84 | 0.64 |
| Proposed (complete, stop) | 0.62 | 0.75 | 0.73 | n/a | 0.64 | 0.69 | 0.49 |
| Proposed (partial, stop) | 0.64 | 0.76 | 0.69 | n/a | 0.65 | 0.66 | 0.43 |
|
| |||||||
| Probability of selecting no combination as MTD
| |||||||
| BTNL | 0.00 | 0.00 | 0.01 | 0.90 | 0.00 | 0.00 | 0.00 |
| Proposed (complete, no stop) | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Proposed (partial, no stop) | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Proposed (complete, stop) | 0.00 | 0.00 | 0.01 | 0.24 | 0.01 | 0.00 | 0.00 |
| Proposed (partial, stop) | 0.00 | 0.00 | 0.01 | 0.25 | 0.01 | 0.00 | 0.00 |
|
| |||||||
| Mean number of patients enrolled
| |||||||
| BTNL | 60.0 | 60.0 | 59.5 | 28.7 | 60.0 | 60.0 | 60.0 |
| Proposed (complete, no stop) | 60.0 | 60.0 | 60.0 | 29.0 | 60.0 | 60.0 | 60.0 |
| Proposed (partial, no stop) | 60.0 | 60.0 | 60.0 | 29.0 | 60.0 | 60.0 | 60.0 |
| Proposed (complete, stop) | 25.6 | 24.6 | 22.4 | 14.5 | 23.4 | 24.3 | 24.3 |
| Proposed (partial, stop) | 26.1 | 25.7 | 23.3 | 15.2 | 24.3 | 25.5 | 25.6 |
|
| |||||||
| Observed incidence of toxicity
| |||||||
| BTNL | 0.22 | 0.29 | 0.34 | 0.54 | 0.31 | 0.31 | 0.33 |
| Proposed (complete, no stop) | 0.21 | 0.28 | 0.32 | 0.50 | 0.31 | 0.31 | 0.33 |
| Proposed (partial, no stop) | 0.21 | 0.29 | 0.34 | 0.53 | 0.30 | 0.32 | 0.31 |
| Proposed (complete, stop) | 0.18 | 0.26 | 0.33 | 0.52 | 0.28 | 0.30 | 0.29 |
| Proposed (partial, stop) | 0.18 | 0.27 | 0.34 | 0.52 | 0.29 | 0.31 | 0.30 |
For 1000 runs, the maximum simulation standard error is approximately 0.016.
BTNL: Braun, Thall, Nguyen, de Lima method.