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Related Concept Videos

Clinical Trials01:16

Clinical Trials

6.7K
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...
6.7K
Clinical Trials: Overview01:11

Clinical Trials: Overview

2.9K
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...
2.9K
Preclinical Development: Overview01:28

Preclinical Development: Overview

4.4K
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...
4.4K
Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches01:23

Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches

128
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,...
128
Hazard Ratio01:12

Hazard Ratio

124
The hazard ratio (HR) is a widely used measure in clinical trials to compare the risk of events, such as death or disease recurrence, between two groups over time. It reflects the ratio of hazard rates—the instantaneous risk of the event occurring—between a treatment group and a control group. This measure provides valuable insights into the relative effectiveness of a treatment by assessing how the risk of an event differs between the two groups.
For example, in a clinical trial...
124
Pharmacovigilance01:19

Pharmacovigilance

833
Post-marketing surveillance is a critical component of pharmaceutical regulation, often uncovering unanticipated adverse drug reactions (ADRs) once a drug is widely used over an extended period.
This process, termed pharmacovigilance, aims to detect, evaluate, and minimize harmful effects related to medication use. The data collection for pharmacovigilance depends on spontaneous reporting systems, where healthcare professionals or patients voluntarily report suspected ADRs.
In some cases, there...
833

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Related Experiment Video

Updated: Jul 4, 2025

A Clinical Trial Assessing the Safety, Efficacy, and Delivery of Olive-Oil-Based Three-Chamber Bags for Parenteral Nutrition
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Stopping Trials Early Due to Harm.

Thomas Cook1, Olive D Buhule2

  • 1Department of Biostatistics and Medical Informatics, University of Wisconsin-Madison, Madison, WI.

NEJM Evidence
|February 6, 2024
PubMed
Summary

Data and Safety Monitoring Boards (DSMBs) halted two clinical trials due to participant harm. One trial stopped early in enrollment due to increased mortality in the experimental group.

Area of Science:

  • Clinical Trials
  • Medical Ethics
  • Patient Safety

Background:

  • Data and Safety Monitoring Boards (DSMBs) are crucial for safeguarding participants in clinical research.
  • Ensuring participant safety is paramount in all phases of clinical trials.

Purpose of the Study:

  • To describe two distinct clinical trials that were terminated prematurely due to evidence of harm to participants.
  • To highlight the role of DSMBs in making critical decisions regarding trial continuation.

Main Methods:

  • Review of two cases where DSMBs recommended trial termination based on emerging safety data.
  • Analysis of the timing and rationale for stopping trials at different stages of participant involvement.

Main Results:

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High Content Screening Analysis to Evaluate the Toxicological Effects of Harmful and Potentially Harmful Constituents HPHC

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  • A DSMB recommended early termination of a trial shortly after enrollment commenced due to observed higher mortality in the experimental arm compared to the control arm.
  • Another trial, with enrollment completed, was stopped during the follow-up and treatment phase due to safety concerns.

Conclusions:

  • DSMBs play a vital role in protecting participants by recommending early trial cessation when significant harm is detected.
  • The decision to stop a trial can occur at various stages, emphasizing the need for ongoing safety surveillance.