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Updated: Jun 17, 2026

A Clinical Trial Assessing the Safety, Efficacy, and Delivery of Olive-Oil-Based Three-Chamber Bags for Parenteral Nutrition
Published on: September 20, 2019
Optimal designs for two-arm, phase II clinical trial design with multiple constraints
Matthew S Mayo1, Jonathan D Mahnken, Seng-Jaw Soong
1Department of Biostatistics, University of Kansas Medical Center, Kansas City, Kansas 66160, USA. mmayo@kumc.edu
This study introduces a new clinical trial design for multi-stage Phase II trials. It incorporates a control arm for better treatment comparison and response rate estimation, improving trial efficiency.
Area of Science:
- Clinical trial design
- Biostatistics
- Pharmaceutical research
Background:
- Multi-stage Phase II trials are common but have limitations.
- Current designs may be suboptimal when endpoints are delayed or a control arm is needed.
Purpose of the Study:
- To present a novel Phase II trial design.
- To incorporate a control arm for comparative analysis.
- To enable estimation of individual treatment response rates and their differences.
Main Methods:
- Developed a new multi-stage Phase II trial design.
- Included sample size determination with a control arm.
- Evaluated the design under various treatment allocation schemes and response rate scenarios.
Main Results:
- The proposed design allows for estimation of response for each treatment.
- The design facilitates the estimation of the difference in response rates between treatments.
- Performance was assessed across different allocation ratios and treatment efficacies.
Conclusions:
- The new design offers a more robust approach for Phase II trials.
- It is particularly beneficial when delayed endpoints or control arms are desired.
- This design enhances the ability to compare treatments effectively within Phase II studies.
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