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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...
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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.
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The randomization process involves assigning study participants randomly to experimental or control groups based on their probability of being equally assigned. Randomization is meant to eliminate selection bias and balance known and unknown confounding factors so that the control group is similar to the treatment group as much as possible. A computer program and a random number generator can be used to assign participants to groups in a way that minimizes bias.
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Related Experiment Video

Updated: Nov 23, 2025

A Clinical Trial Assessing the Safety, Efficacy, and Delivery of Olive-Oil-Based Three-Chamber Bags for Parenteral Nutrition
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Integrating shared decision making into trial consent: A nested, cluster-randomized trial.

Ellen A Lipstein1, Maggie Breslin2, Cassandra M Dodds3

  • 1James M. Anderson Center for Health Systems Excellence, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave, Cincinnati, OH, USA; Department of Pediatrics, University of Cincinnati College of Medicine, 3333 Burnet Ave, Cincinnati, OH, USA.

Patient Education and Counseling
|January 2, 2021
PubMed
Summary
This summary is machine-generated.

A shared decision-making intervention during consent did not improve participant knowledge in clinical trials. However, the study demonstrated the intervention

Keywords:
Decision aidsInflammatory bowel diseaseInformed consentPediatricsShared decision making

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Area of Science:

  • Clinical Trials
  • Health Literacy
  • Shared Decision-Making

Background:

  • Informed consent is crucial for clinical trial participation.
  • Enhancing participant understanding of study procedures and implications is essential.
  • Shared decision-making (SDM) models aim to improve patient engagement and knowledge.

Purpose of the Study:

  • To test if a shared decision-making intervention improves participant knowledge in a clinical trial.
  • To assess the feasibility and acceptability of implementing SDM in the informed consent process.
  • To evaluate the impact of SDM on decisional support and enrollment rates.

Main Methods:

  • A nested, cluster-randomized trial design was employed.
  • Sites were randomized to either an SDM intervention or standard consent.
  • Participant knowledge and decisional support were primary outcomes, measured via surveys.

Main Results:

  • No significant difference in study-related knowledge was observed between the SDM intervention and standard consent groups.
  • Decisional support and enrollment rates also showed no significant differences between the arms.
  • Qualitative data indicated variable clinician adoption of the SDM intervention.

Conclusions:

  • The shared decision-making intervention did not improve participant knowledge or decisional support in this trial.
  • The study successfully demonstrated the feasibility and acceptability of integrating SDM into the informed consent process.
  • Future research should explore adaptations of the intervention and refined measurement strategies.