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Related Concept Videos

Bioequivalence Experimental Study Designs: Repeated Measures, Cross-Over, Carry-Over, and Latin Square Designs01:15

Bioequivalence Experimental Study Designs: Repeated Measures, Cross-Over, Carry-Over, and Latin Square Designs

Bioequivalence experimental study designs play a pivotal role in testing the effectiveness of various treatments. Key among these are the repeated measures, cross-over, carry-over, and Latin square designs. In the repeated measures design, each subject receives all treatments, allowing for temporal comparisons. This type of design is useful in reducing variability but requires careful planning to avoid bias.The cross-over design, an economical method, involves sequential administration of...
Bioequivalence Experimental Study Designs: Completely Randomized and Randomized Block Designs01:20

Bioequivalence Experimental Study Designs: Completely Randomized and Randomized Block Designs

Bioequivalence experimental study designs are crucial methodologies used in evaluating and comparing the bioavailability of different drug products. These designs are categorized into various types: completely randomized, randomized block, repeated measures, cross and carry-over, and Latin square designs.Completely randomized designs involve randomly allocating treatments to all subjects participating in the experiment. This allocation is achieved by assigning unique random numbers to subjects...
Clinical Trials: Overview01:11

Clinical 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...
Clinical Trials01:16

Clinical 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...
Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches01:23

Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches

Biopharmaceutical studies constitute a vital field aiming to enhance drug delivery methods and refine therapeutic approaches, drawing upon diverse interdisciplinary knowledge. In research methodologies, the choice between controlled and non-controlled studies significantly influences the study's reliability and accuracy.
Non-controlled studies, commonly employed for initial exploration, lack a control group, rendering them susceptible to biases and external influences. In contrast, controlled...
Study Designs in Epidemiology01:20

Study Designs in Epidemiology

Epidemiological study designs are fundamental tools for investigating the distribution, determinants, and control of health conditions in populations. They help researchers understand the relationships between exposures and outcomes, and they broadly fall into two categories: "observational" and "experimental" studies.
Observational studies are those where the researcher does not intervene but rather observes natural variations. They include cross-sectional, cohort, and case-control studies.

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Related Experiment Video

Updated: May 19, 2026

Preparation of Peripheral Blood Mononuclear Cell Pellets and Plasma from a Single Blood Draw at Clinical Trial Sites for Biomarker Analysis
07:40

Preparation of Peripheral Blood Mononuclear Cell Pellets and Plasma from a Single Blood Draw at Clinical Trial Sites for Biomarker Analysis

Published on: March 20, 2021

Randomized phase II trial designs with biomarkers.

Boris Freidlin1, Lisa M McShane, Mei-Yin C Polley

  • 1Biometric Research Branch, EPN-8129, National Cancer Institute, Bethesda, MD 20852, USA. freidlinb@ctep.nci.nih.gov

Journal of Clinical Oncology : Official Journal of the American Society of Clinical Oncology
|August 8, 2012
PubMed
Summary

This study introduces a novel randomized phase II biomarker trial design. This design effectively guides the selection of appropriate phase III clinical trial strategies for targeted therapies and biomarkers.

Related Experiment Videos

Last Updated: May 19, 2026

Preparation of Peripheral Blood Mononuclear Cell Pellets and Plasma from a Single Blood Draw at Clinical Trial Sites for Biomarker Analysis
07:40

Preparation of Peripheral Blood Mononuclear Cell Pellets and Plasma from a Single Blood Draw at Clinical Trial Sites for Biomarker Analysis

Published on: March 20, 2021

Area of Science:

  • Clinical Trials
  • Biostatistics
  • Oncology

Background:

  • Targeted therapies require biomarkers to identify patient subpopulations.
  • Phase III trials are crucial for definitive evaluation but require robust phase II data.
  • Existing phase II designs may not adequately inform phase III biomarker strategies.

Purpose of the Study:

  • To propose a new randomized phase II biomarker trial design.
  • To ensure phase II trials provide recommendations for subsequent phase III trial designs.
  • To optimize the development pathway for targeted therapies and biomarkers.

Main Methods:

  • Development of a novel randomized phase II biomarker trial design.
  • Utilizing simulations and published data for design evaluation.
  • Assessing the design's ability to recommend phase III strategies.

Main Results:

  • The proposed phase II design effectively recommends phase III trial approaches.
  • Recommendations include proceeding with or without biomarker use, or halting further development.
  • Evaluations confirmed the design's utility in guiding future clinical trial planning.

Conclusions:

  • The proposed randomized phase II biomarker trial design is effective.
  • It provides crucial guidance for selecting optimal phase III trial designs.
  • This approach enhances the efficient development of targeted therapies.