Related Experiment Video
Updated: Aug 9, 2026
10:49
Pre-clinical Evaluation of Tyrosine Kinase Inhibitors for Treatment of Acute Leukemia
Published on: September 18, 2013
Some ethical issues in phase II trials in acute leukemia
1Department of Biostatistics and Applied Mathematics, University of Texas M. D. Anderson Cancer Center, Houston 77030, USA. rex@mdanderson.org
Clinical Advances in Hematology & Oncology : H&O
|March 25, 2006
Summary
Phase II clinical trial designs must balance statistical rigor with patient welfare. Poorly designed trials, especially in acute leukemia, can offer less benefit than standard therapy, highlighting ethical and scientific integration needs.
Area of Science:
- Clinical Trials Methodology
- Biostatistics
- Oncology
Background:
- Phase II clinical trials are crucial for evaluating experimental therapies.
- Ethical and scientific considerations in trial design are paramount.
- Acute leukemia chemotherapy trials serve as a key example.
Purpose of the Study:
- To examine scientific and ethical issues in Phase II clinical trial design.
- To analyze the impact of statistical design choices on patient outcomes.
- To evaluate the balance between response rate targets and early stopping rules.
Main Methods:
- Numerical comparisons of alternative statistical designs for Phase II trials.
- Analysis of response rate specifications and interim testing frequencies.
- Assessment of early stopping probabilities and patient treatment allocation.
Main Results:
- Designs targeting low response rates or infrequent early stopping are suboptimal.
- Such designs may provide less patient benefit compared to standard therapy.
- Statistical design choices directly influence scientific validity and ethical practice.
Conclusions:
- Statistical designs in clinical trials have profound scientific and ethical implications.
- Science, statistics, and ethics must be integrated in trial design.
- Optimized Phase II trial designs are essential for patient benefit and scientific advancement.
Related Concept Videos
01:16Clinical Trials
Clinical trials are prospective experimental studies conducted on humans to determine the safety and efficacy of treatments, drugs, diet methods, and medical devices. Using statistics in clinical trials enables researchers to derive reasonable and accurate conclusions from the collected data, allowing them to make wise decisions in uncertain situations. In medical research, statistical methods are crucial for preventing errors and bias.
There are four phases in a clinical trial. A phase one...
There are four phases in a clinical trial. A phase one...
01:11Clinical Trials: Overview
Clinical development focuses on how the drug will interact with the human body and encompasses four key phases of clinical trials, each serving a specific purpose in assessing the safety and effectiveness of new drugs. These phases overlap and build upon one another. Phase I involves a small group of healthy volunteers (typically 20-80 individuals) or, in cases where significant toxicity is expected, patients with the targeted disease, such as cancer or AIDS. The volunteers are tested for...
01:28Preclinical Development: Overview
Preclinical development consists of a series of tests that ensure the safety and efficacy of a new therapeutic compound before it is tested in humans. There are four main phases to this process. First, safety pharmacology tests are conducted to ensure the drug does not produce any acutely harmful effects. These tests examine parameters such as bronchoconstriction, cardiac dysrhythmias, blood pressure changes, and ataxia. Next, preliminary toxicological testing is performed to determine the...